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Merge branch 'master' into performance 

Conflicts:
	db/db_impl.cc
	db/db_test.cc
	db/memtable.cc
	db/version_set.cc
	include/rocksdb/statistics.h
This commit is contained in:
kailiu 2013-12-27 12:23:17 -08:00
parent bf4a48ccb3 a094f3b3b5
commit f1cec73a76
38 changed files with 3557 additions and 977 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
Makefile
View File

@ -45,6 +45,8 @@ VALGRIND_VER := $(join $(VALGRIND_VER),valgrind)
VALGRIND_OPTS = --error-exitcode=$(VALGRIND_ERROR) --leak-check=full
TESTS = \
autovector_test \
db_test \
table_properties_collector_test \
arena_test \
auto_roll_logger_test \
@ -74,12 +76,12 @@ TESTS = \
skiplist_test \
stringappend_test \
ttl_test \
backupable_db_test \
version_edit_test \
version_set_test \
write_batch_test\
deletefile_test \
table_test \
db_test
table_test
TOOLS = \
sst_dump \
@ -125,7 +127,7 @@ $(SHARED2): $(SHARED3)
endif
$(SHARED3):
$(CXX) $(LDFLAGS) $(PLATFORM_SHARED_LDFLAGS)$(SHARED2) $(CXXFLAGS) $(COVERAGEFLAGS) $(PLATFORM_SHARED_CFLAGS) $(SOURCES) -o $(SHARED3)
$(CXX) $(PLATFORM_SHARED_LDFLAGS)$(SHARED2) $(CXXFLAGS) $(COVERAGEFLAGS) $(PLATFORM_SHARED_CFLAGS) $(SOURCES) -o $@ $(LDFLAGS)
endif # PLATFORM_SHARED_EXT
@ -145,8 +147,9 @@ coverage:
# Delete intermediate files
find . -type f -regex ".*\.\(\(gcda\)\|\(gcno\)\)" -exec rm {} \;
check: all $(PROGRAMS) $(TESTS) $(TOOLS) ldb_tests
check: all $(PROGRAMS) $(TESTS) $(TOOLS)
for t in $(TESTS); do echo "***** Running $$t"; ./$$t || exit 1; done
python tools/ldb_test.py
ldb_tests: all $(PROGRAMS) $(TOOLS)
python tools/ldb_test.py
@ -223,6 +226,9 @@ signal_test: util/signal_test.o $(LIBOBJECTS)
arena_test: util/arena_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) util/arena_test.o $(LIBOBJECTS) $(TESTHARNESS) $(EXEC_LDFLAGS) -o $@ $(LDFLAGS) $(COVERAGEFLAGS)
autovector_test: util/autovector_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) util/autovector_test.o $(LIBOBJECTS) $(TESTHARNESS) $(EXEC_LDFLAGS) -o $@ $(LDFLAGS) $(COVERAGEFLAGS)
table_properties_collector_test: db/table_properties_collector_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) db/table_properties_collector_test.o $(LIBOBJECTS) $(TESTHARNESS) $(EXEC_LDFLAGS) -o $@ $(LDFLAGS) $(COVERAGEFLAGS)
@ -277,6 +283,9 @@ perf_context_test: db/perf_context_test.o $(LIBOBJECTS) $(TESTHARNESS)
prefix_test: db/prefix_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) db/prefix_test.o $(LIBOBJECTS) $(TESTHARNESS) $(EXEC_LDFLAGS) -o $@ $(LDFLAGS)
backupable_db_test: utilities/backupable/backupable_db_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) utilities/backupable/backupable_db_test.o $(LIBOBJECTS) $(TESTHARNESS) $(EXEC_LDFLAGS) -o $@ $(LDFLAGS) $(COVERAGEFLAGS)
ttl_test: utilities/ttl/ttl_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) utilities/ttl/ttl_test.o $(LIBOBJECTS) $(TESTHARNESS) $(EXEC_LDFLAGS) -o $@ $(LDFLAGS) $(COVERAGEFLAGS)

2
README
View File

@ -79,4 +79,4 @@ include/rocksdb/statistics.h
include/rocksdb/transaction_log.h
An API to retrieve transaction logs from a database.
Design discussions are conducted in https://www.facebook.com/groups/rocksdb.dev/

12
build_tools/build_detect_platform
View File

@ -189,6 +189,18 @@ EOF
COMMON_FLAGS="$COMMON_FLAGS -DROCKSDB_ATOMIC_PRESENT"
fi
# Test whether fallocate is available
$CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null <<EOF
#include <fcntl.h>
int main() {
int fd = open("/dev/null", 0);
fallocate(fd, 0, 0, 1024);
}
EOF
if [ "$?" = 0 ]; then
COMMON_FLAGS="$PLATFORM_LDFLAGS -DROCKSDB_FALLOCATE_PRESENT"
fi
# Test whether Snappy library is installed
# http://code.google.com/p/snappy/
$CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null <<EOF

473
db/c.cc
View File

@ -20,6 +20,8 @@
#include "rocksdb/options.h"
#include "rocksdb/status.h"
#include "rocksdb/write_batch.h"
#include "rocksdb/memtablerep.h"
#include "rocksdb/universal_compaction.h"
using rocksdb::Cache;
using rocksdb::Comparator;
@ -48,21 +50,21 @@ using std::shared_ptr;
extern "C" {
struct leveldb_t { DB* rep; };
struct leveldb_iterator_t { Iterator* rep; };
struct leveldb_writebatch_t { WriteBatch rep; };
struct leveldb_snapshot_t { const Snapshot* rep; };
struct leveldb_readoptions_t { ReadOptions rep; };
struct leveldb_writeoptions_t { WriteOptions rep; };
struct leveldb_options_t { Options rep; };
struct leveldb_seqfile_t { SequentialFile* rep; };
struct leveldb_randomfile_t { RandomAccessFile* rep; };
struct leveldb_writablefile_t { WritableFile* rep; };
struct leveldb_filelock_t { FileLock* rep; };
struct leveldb_logger_t { shared_ptr<Logger> rep; };
struct leveldb_cache_t { shared_ptr<Cache> rep; };
struct rocksdb_t { DB* rep; };
struct rocksdb_iterator_t { Iterator* rep; };
struct rocksdb_writebatch_t { WriteBatch rep; };
struct rocksdb_snapshot_t { const Snapshot* rep; };
struct rocksdb_readoptions_t { ReadOptions rep; };
struct rocksdb_writeoptions_t { WriteOptions rep; };
struct rocksdb_options_t { Options rep; };
struct rocksdb_seqfile_t { SequentialFile* rep; };
struct rocksdb_randomfile_t { RandomAccessFile* rep; };
struct rocksdb_writablefile_t { WritableFile* rep; };
struct rocksdb_filelock_t { FileLock* rep; };
struct rocksdb_logger_t { shared_ptr<Logger> rep; };
struct rocksdb_cache_t { shared_ptr<Cache> rep; };
struct leveldb_comparator_t : public Comparator {
struct rocksdb_comparator_t : public Comparator {
void* state_;
void (*destructor_)(void*);
int (*compare_)(
@ -71,7 +73,7 @@ struct leveldb_comparator_t : public Comparator {
const char* b, size_t blen);
const char* (*name_)(void*);
virtual ~leveldb_comparator_t() {
virtual ~rocksdb_comparator_t() {
(*destructor_)(state_);
}
@ -88,7 +90,7 @@ struct leveldb_comparator_t : public Comparator {
virtual void FindShortSuccessor(std::string* key) const { }
};
struct leveldb_filterpolicy_t : public FilterPolicy {
struct rocksdb_filterpolicy_t : public FilterPolicy {
void* state_;
void (*destructor_)(void*);
const char* (*name_)(void*);
@ -102,7 +104,7 @@ struct leveldb_filterpolicy_t : public FilterPolicy {
const char* key, size_t length,
const char* filter, size_t filter_length);
virtual ~leveldb_filterpolicy_t() {
virtual ~rocksdb_filterpolicy_t() {
(*destructor_)(state_);
}
@ -129,11 +131,16 @@ struct leveldb_filterpolicy_t : public FilterPolicy {
}
};
struct leveldb_env_t {
struct rocksdb_env_t {
Env* rep;
bool is_default;
};
struct rocksdb_universal_compaction_options_t {
rocksdb::CompactionOptionsUniversal *rep;
};
static bool SaveError(char** errptr, const Status& s) {
assert(errptr != NULL);
if (s.ok()) {
@ -154,27 +161,27 @@ static char* CopyString(const std::string& str) {
return result;
}
leveldb_t* leveldb_open(
const leveldb_options_t* options,
rocksdb_t* rocksdb_open(
const rocksdb_options_t* options,
const char* name,
char** errptr) {
DB* db;
if (SaveError(errptr, DB::Open(options->rep, std::string(name), &db))) {
return NULL;
}
leveldb_t* result = new leveldb_t;
rocksdb_t* result = new rocksdb_t;
result->rep = db;
return result;
}
void leveldb_close(leveldb_t* db) {
void rocksdb_close(rocksdb_t* db) {
delete db->rep;
delete db;
}
void leveldb_put(
leveldb_t* db,
const leveldb_writeoptions_t* options,
void rocksdb_put(
rocksdb_t* db,
const rocksdb_writeoptions_t* options,
const char* key, size_t keylen,
const char* val, size_t vallen,
char** errptr) {
@ -182,26 +189,26 @@ void leveldb_put(
db->rep->Put(options->rep, Slice(key, keylen), Slice(val, vallen)));
}
void leveldb_delete(
leveldb_t* db,
const leveldb_writeoptions_t* options,
void rocksdb_delete(
rocksdb_t* db,
const rocksdb_writeoptions_t* options,
const char* key, size_t keylen,
char** errptr) {
SaveError(errptr, db->rep->Delete(options->rep, Slice(key, keylen)));
}
void leveldb_write(
leveldb_t* db,
const leveldb_writeoptions_t* options,
leveldb_writebatch_t* batch,
void rocksdb_write(
rocksdb_t* db,
const rocksdb_writeoptions_t* options,
rocksdb_writebatch_t* batch,
char** errptr) {
SaveError(errptr, db->rep->Write(options->rep, &batch->rep));
}
char* leveldb_get(
leveldb_t* db,
const leveldb_readoptions_t* options,
char* rocksdb_get(
rocksdb_t* db,
const rocksdb_readoptions_t* options,
const char* key, size_t keylen,
size_t* vallen,
char** errptr) {
@ -220,30 +227,30 @@ char* leveldb_get(
return result;
}
leveldb_iterator_t* leveldb_create_iterator(
leveldb_t* db,
const leveldb_readoptions_t* options) {
leveldb_iterator_t* result = new leveldb_iterator_t;
rocksdb_iterator_t* rocksdb_create_iterator(
rocksdb_t* db,
const rocksdb_readoptions_t* options) {
rocksdb_iterator_t* result = new rocksdb_iterator_t;
result->rep = db->rep->NewIterator(options->rep);
return result;
}
const leveldb_snapshot_t* leveldb_create_snapshot(
leveldb_t* db) {
leveldb_snapshot_t* result = new leveldb_snapshot_t;
const rocksdb_snapshot_t* rocksdb_create_snapshot(
rocksdb_t* db) {
rocksdb_snapshot_t* result = new rocksdb_snapshot_t;
result->rep = db->rep->GetSnapshot();
return result;
}
void leveldb_release_snapshot(
leveldb_t* db,
const leveldb_snapshot_t* snapshot) {
void rocksdb_release_snapshot(
rocksdb_t* db,
const rocksdb_snapshot_t* snapshot) {
db->rep->ReleaseSnapshot(snapshot->rep);
delete snapshot;
}
char* leveldb_property_value(
leveldb_t* db,
char* rocksdb_property_value(
rocksdb_t* db,
const char* propname) {
std::string tmp;
if (db->rep->GetProperty(Slice(propname), &tmp)) {
@ -254,8 +261,8 @@ char* leveldb_property_value(
}
}
void leveldb_approximate_sizes(
leveldb_t* db,
void rocksdb_approximate_sizes(
rocksdb_t* db,
int num_ranges,
const char* const* range_start_key, const size_t* range_start_key_len,
const char* const* range_limit_key, const size_t* range_limit_key_len,
@ -269,8 +276,8 @@ void leveldb_approximate_sizes(
delete[] ranges;
}
void leveldb_compact_range(
leveldb_t* db,
void rocksdb_compact_range(
rocksdb_t* db,
const char* start_key, size_t start_key_len,
const char* limit_key, size_t limit_key_len) {
Slice a, b;
@ -280,92 +287,92 @@ void leveldb_compact_range(
(limit_key ? (b = Slice(limit_key, limit_key_len), &b) : NULL));
}
void leveldb_destroy_db(
const leveldb_options_t* options,
void rocksdb_destroy_db(
const rocksdb_options_t* options,
const char* name,
char** errptr) {
SaveError(errptr, DestroyDB(name, options->rep));
}
void leveldb_repair_db(
const leveldb_options_t* options,
void rocksdb_repair_db(
const rocksdb_options_t* options,
const char* name,
char** errptr) {
SaveError(errptr, RepairDB(name, options->rep));
}
void leveldb_iter_destroy(leveldb_iterator_t* iter) {
void rocksdb_iter_destroy(rocksdb_iterator_t* iter) {
delete iter->rep;
delete iter;
}
unsigned char leveldb_iter_valid(const leveldb_iterator_t* iter) {
unsigned char rocksdb_iter_valid(const rocksdb_iterator_t* iter) {
return iter->rep->Valid();
}
void leveldb_iter_seek_to_first(leveldb_iterator_t* iter) {
void rocksdb_iter_seek_to_first(rocksdb_iterator_t* iter) {
iter->rep->SeekToFirst();
}
void leveldb_iter_seek_to_last(leveldb_iterator_t* iter) {
void rocksdb_iter_seek_to_last(rocksdb_iterator_t* iter) {
iter->rep->SeekToLast();
}
void leveldb_iter_seek(leveldb_iterator_t* iter, const char* k, size_t klen) {
void rocksdb_iter_seek(rocksdb_iterator_t* iter, const char* k, size_t klen) {
iter->rep->Seek(Slice(k, klen));
}
void leveldb_iter_next(leveldb_iterator_t* iter) {
void rocksdb_iter_next(rocksdb_iterator_t* iter) {
iter->rep->Next();
}
void leveldb_iter_prev(leveldb_iterator_t* iter) {
void rocksdb_iter_prev(rocksdb_iterator_t* iter) {
iter->rep->Prev();
}
const char* leveldb_iter_key(const leveldb_iterator_t* iter, size_t* klen) {
const char* rocksdb_iter_key(const rocksdb_iterator_t* iter, size_t* klen) {
Slice s = iter->rep->key();
*klen = s.size();
return s.data();
}
const char* leveldb_iter_value(const leveldb_iterator_t* iter, size_t* vlen) {
const char* rocksdb_iter_value(const rocksdb_iterator_t* iter, size_t* vlen) {
Slice s = iter->rep->value();
*vlen = s.size();
return s.data();
}
void leveldb_iter_get_error(const leveldb_iterator_t* iter, char** errptr) {
void rocksdb_iter_get_error(const rocksdb_iterator_t* iter, char** errptr) {
SaveError(errptr, iter->rep->status());
}
leveldb_writebatch_t* leveldb_writebatch_create() {
return new leveldb_writebatch_t;
rocksdb_writebatch_t* rocksdb_writebatch_create() {
return new rocksdb_writebatch_t;
}
void leveldb_writebatch_destroy(leveldb_writebatch_t* b) {
void rocksdb_writebatch_destroy(rocksdb_writebatch_t* b) {
delete b;
}
void leveldb_writebatch_clear(leveldb_writebatch_t* b) {
void rocksdb_writebatch_clear(rocksdb_writebatch_t* b) {
b->rep.Clear();
}
void leveldb_writebatch_put(
leveldb_writebatch_t* b,
void rocksdb_writebatch_put(
rocksdb_writebatch_t* b,
const char* key, size_t klen,
const char* val, size_t vlen) {
b->rep.Put(Slice(key, klen), Slice(val, vlen));
}
void leveldb_writebatch_delete(
leveldb_writebatch_t* b,
void rocksdb_writebatch_delete(
rocksdb_writebatch_t* b,
const char* key, size_t klen) {
b->rep.Delete(Slice(key, klen));
}
void leveldb_writebatch_iterate(
leveldb_writebatch_t* b,
void rocksdb_writebatch_iterate(
rocksdb_writebatch_t* b,
void* state,
void (*put)(void*, const char* k, size_t klen, const char* v, size_t vlen),
void (*deleted)(void*, const char* k, size_t klen)) {
@ -388,132 +395,132 @@ void leveldb_writebatch_iterate(
b->rep.Iterate(&handler);
}
leveldb_options_t* leveldb_options_create() {
return new leveldb_options_t;
rocksdb_options_t* rocksdb_options_create() {
return new rocksdb_options_t;
}
void leveldb_options_destroy(leveldb_options_t* options) {
void rocksdb_options_destroy(rocksdb_options_t* options) {
delete options;
}
void leveldb_options_set_comparator(
leveldb_options_t* opt,
leveldb_comparator_t* cmp) {
void rocksdb_options_set_comparator(
rocksdb_options_t* opt,
rocksdb_comparator_t* cmp) {
opt->rep.comparator = cmp;
}
void leveldb_options_set_filter_policy(
leveldb_options_t* opt,
leveldb_filterpolicy_t* policy) {
void rocksdb_options_set_filter_policy(
rocksdb_options_t* opt,
rocksdb_filterpolicy_t* policy) {
opt->rep.filter_policy = policy;
}
void leveldb_options_set_create_if_missing(
leveldb_options_t* opt, unsigned char v) {
void rocksdb_options_set_create_if_missing(
rocksdb_options_t* opt, unsigned char v) {
opt->rep.create_if_missing = v;
}
void leveldb_options_set_error_if_exists(
leveldb_options_t* opt, unsigned char v) {
void rocksdb_options_set_error_if_exists(
rocksdb_options_t* opt, unsigned char v) {
opt->rep.error_if_exists = v;
}
void leveldb_options_set_paranoid_checks(
leveldb_options_t* opt, unsigned char v) {
void rocksdb_options_set_paranoid_checks(
rocksdb_options_t* opt, unsigned char v) {
opt->rep.paranoid_checks = v;
}
void leveldb_options_set_env(leveldb_options_t* opt, leveldb_env_t* env) {
void rocksdb_options_set_env(rocksdb_options_t* opt, rocksdb_env_t* env) {
opt->rep.env = (env ? env->rep : NULL);
}
void leveldb_options_set_info_log(leveldb_options_t* opt, leveldb_logger_t* l) {
void rocksdb_options_set_info_log(rocksdb_options_t* opt, rocksdb_logger_t* l) {
if (l) {
opt->rep.info_log = l->rep;
}
}
void leveldb_options_set_write_buffer_size(leveldb_options_t* opt, size_t s) {
void rocksdb_options_set_write_buffer_size(rocksdb_options_t* opt, size_t s) {
opt->rep.write_buffer_size = s;
}
void leveldb_options_set_max_open_files(leveldb_options_t* opt, int n) {
void rocksdb_options_set_max_open_files(rocksdb_options_t* opt, int n) {
opt->rep.max_open_files = n;
}
void leveldb_options_set_cache(leveldb_options_t* opt, leveldb_cache_t* c) {
void rocksdb_options_set_cache(rocksdb_options_t* opt, rocksdb_cache_t* c) {
if (c) {
opt->rep.block_cache = c->rep;
}
}
void leveldb_options_set_block_size(leveldb_options_t* opt, size_t s) {
void rocksdb_options_set_block_size(rocksdb_options_t* opt, size_t s) {
opt->rep.block_size = s;
}
void leveldb_options_set_block_restart_interval(leveldb_options_t* opt, int n) {
void rocksdb_options_set_block_restart_interval(rocksdb_options_t* opt, int n) {
opt->rep.block_restart_interval = n;
}
void leveldb_options_set_target_file_size_base(
leveldb_options_t* opt, uint64_t n) {
void rocksdb_options_set_target_file_size_base(
rocksdb_options_t* opt, uint64_t n) {
opt->rep.target_file_size_base = n;
}
void leveldb_options_set_target_file_size_multiplier(
leveldb_options_t* opt, int n) {
void rocksdb_options_set_target_file_size_multiplier(
rocksdb_options_t* opt, int n) {
opt->rep.target_file_size_multiplier = n;
}
void leveldb_options_set_max_bytes_for_level_base(
leveldb_options_t* opt, uint64_t n) {
void rocksdb_options_set_max_bytes_for_level_base(
rocksdb_options_t* opt, uint64_t n) {
opt->rep.max_bytes_for_level_base = n;
}
void leveldb_options_set_max_bytes_for_level_multiplier(
leveldb_options_t* opt, int n) {
void rocksdb_options_set_max_bytes_for_level_multiplier(
rocksdb_options_t* opt, int n) {
opt->rep.max_bytes_for_level_multiplier = n;
}
void leveldb_options_set_expanded_compaction_factor(
leveldb_options_t* opt, int n) {
void rocksdb_options_set_expanded_compaction_factor(
rocksdb_options_t* opt, int n) {
opt->rep.expanded_compaction_factor = n;
}
void leveldb_options_set_max_grandparent_overlap_factor(
leveldb_options_t* opt, int n) {
void rocksdb_options_set_max_grandparent_overlap_factor(
rocksdb_options_t* opt, int n) {
opt->rep.max_grandparent_overlap_factor = n;
}
void leveldb_options_set_num_levels(leveldb_options_t* opt, int n) {
void rocksdb_options_set_num_levels(rocksdb_options_t* opt, int n) {
opt->rep.num_levels = n;
}
void leveldb_options_set_level0_file_num_compaction_trigger(
leveldb_options_t* opt, int n) {
void rocksdb_options_set_level0_file_num_compaction_trigger(
rocksdb_options_t* opt, int n) {
opt->rep.level0_file_num_compaction_trigger = n;
}
void leveldb_options_set_level0_slowdown_writes_trigger(
leveldb_options_t* opt, int n) {
void rocksdb_options_set_level0_slowdown_writes_trigger(
rocksdb_options_t* opt, int n) {
opt->rep.level0_slowdown_writes_trigger = n;
}
void leveldb_options_set_level0_stop_writes_trigger(
leveldb_options_t* opt, int n) {
void rocksdb_options_set_level0_stop_writes_trigger(
rocksdb_options_t* opt, int n) {
opt->rep.level0_stop_writes_trigger = n;
}
void leveldb_options_set_max_mem_compaction_level(
leveldb_options_t* opt, int n) {
void rocksdb_options_set_max_mem_compaction_level(
rocksdb_options_t* opt, int n) {
opt->rep.max_mem_compaction_level = n;
}
void leveldb_options_set_compression(leveldb_options_t* opt, int t) {
void rocksdb_options_set_compression(rocksdb_options_t* opt, int t) {
opt->rep.compression = static_cast<CompressionType>(t);
}
void leveldb_options_set_compression_per_level(leveldb_options_t* opt,
void rocksdb_options_set_compression_per_level(rocksdb_options_t* opt,
int* level_values,
size_t num_levels) {
opt->rep.compression_per_level.resize(num_levels);
@ -523,43 +530,132 @@ void leveldb_options_set_compression_per_level(leveldb_options_t* opt,
}
}
void leveldb_options_set_compression_options(
leveldb_options_t* opt, int w_bits, int level, int strategy) {
void rocksdb_options_set_compression_options(
rocksdb_options_t* opt, int w_bits, int level, int strategy) {
opt->rep.compression_opts.window_bits = w_bits;
opt->rep.compression_opts.level = level;
opt->rep.compression_opts.strategy = strategy;
}
void leveldb_options_set_disable_data_sync(
leveldb_options_t* opt, bool disable_data_sync) {
void rocksdb_options_set_disable_data_sync(
rocksdb_options_t* opt, int disable_data_sync) {
opt->rep.disableDataSync = disable_data_sync;
}
void leveldb_options_set_use_fsync(
leveldb_options_t* opt, bool use_fsync) {
void rocksdb_options_set_use_fsync(
rocksdb_options_t* opt, int use_fsync) {
opt->rep.use_fsync = use_fsync;
}
void leveldb_options_set_db_stats_log_interval(
leveldb_options_t* opt, int db_stats_log_interval) {
void rocksdb_options_set_db_stats_log_interval(
rocksdb_options_t* opt, int db_stats_log_interval) {
opt->rep.db_stats_log_interval = db_stats_log_interval;
}
void leveldb_options_set_db_log_dir(
leveldb_options_t* opt, const char* db_log_dir) {
void rocksdb_options_set_db_log_dir(
rocksdb_options_t* opt, const char* db_log_dir) {
opt->rep.db_log_dir = db_log_dir;
}
void leveldb_options_set_WAL_ttl_seconds(leveldb_options_t* opt, uint64_t ttl) {
void rocksdb_options_set_WAL_ttl_seconds(rocksdb_options_t* opt, uint64_t ttl) {
opt->rep.WAL_ttl_seconds = ttl;
}
void leveldb_options_set_WAL_size_limit_MB(
leveldb_options_t* opt, uint64_t limit) {
void rocksdb_options_set_WAL_size_limit_MB(
rocksdb_options_t* opt, uint64_t limit) {
opt->rep.WAL_size_limit_MB = limit;
}
leveldb_comparator_t* leveldb_comparator_create(
void rocksdb_options_set_max_write_buffer_number(rocksdb_options_t* opt, int n) {
opt->rep.max_write_buffer_number = n;
}
void rocksdb_options_set_min_write_buffer_number_to_merge(rocksdb_options_t* opt, int n) {
opt->rep.min_write_buffer_number_to_merge = n;
}
void rocksdb_options_set_max_background_compactions(rocksdb_options_t* opt, int n) {
opt->rep.max_background_compactions = n;
}
void rocksdb_options_set_max_background_flushes(rocksdb_options_t* opt, int n) {
opt->rep.max_background_flushes = n;
}
void rocksdb_options_set_disable_auto_compactions(rocksdb_options_t* opt, int disable) {
opt->rep.disable_auto_compactions = disable;
}
void rocksdb_options_set_disable_seek_compaction(rocksdb_options_t* opt, int disable) {
opt->rep.disable_seek_compaction = disable;
}
void rocksdb_options_set_source_compaction_factor(
rocksdb_options_t* opt, int n) {
opt->rep.expanded_compaction_factor = n;
}
void rocksdb_options_prepare_for_bulk_load(rocksdb_options_t* opt) {
opt->rep.PrepareForBulkLoad();
}
void rocksdb_options_set_memtable_vector_rep(rocksdb_options_t *opt) {
static rocksdb::VectorRepFactory* factory = 0;
if (!factory) {
factory = new rocksdb::VectorRepFactory;
}
opt->rep.memtable_factory.reset(factory);
}
void rocksdb_options_set_compaction_style(rocksdb_options_t *opt, int style) {
opt->rep.compaction_style = static_cast<rocksdb::CompactionStyle>(style);
}
void rocksdb_options_set_universal_compaction_options(rocksdb_options_t *opt, rocksdb_universal_compaction_options_t *uco) {
opt->rep.compaction_options_universal = *(uco->rep);
}
/*
TODO:
merge_operator
compaction_filter
prefix_extractor
whole_key_filtering
max_bytes_for_level_multiplier_additional
delete_obsolete_files_period_micros
max_log_file_size
log_file_time_to_roll
keep_log_file_num
soft_rate_limit
hard_rate_limit
rate_limit_delay_max_milliseconds
max_manifest_file_size
no_block_cache
table_cache_numshardbits
table_cache_remove_scan_count_limit
arena_block_size
manifest_preallocation_size
purge_redundant_kvs_while_flush
allow_os_buffer
allow_mmap_reads
allow_mmap_writes
is_fd_close_on_exec
skip_log_error_on_recovery
stats_dump_period_sec
block_size_deviation
advise_random_on_open
access_hint_on_compaction_start
use_adaptive_mutex
bytes_per_sync
filter_deletes
max_sequential_skip_in_iterations
table_factory
table_properties_collectors
inplace_update_support
inplace_update_num_locks
*/
rocksdb_comparator_t* rocksdb_comparator_create(
void* state,
void (*destructor)(void*),
int (*compare)(
@ -567,7 +663,7 @@ leveldb_comparator_t* leveldb_comparator_create(
const char* a, size_t alen,
const char* b, size_t blen),
const char* (*name)(void*)) {
leveldb_comparator_t* result = new leveldb_comparator_t;
rocksdb_comparator_t* result = new rocksdb_comparator_t;
result->state_ = state;
result->destructor_ = destructor;
result->compare_ = compare;
@ -575,11 +671,11 @@ leveldb_comparator_t* leveldb_comparator_create(
return result;
}
void leveldb_comparator_destroy(leveldb_comparator_t* cmp) {
void rocksdb_comparator_destroy(rocksdb_comparator_t* cmp) {
delete cmp;
}
leveldb_filterpolicy_t* leveldb_filterpolicy_create(
rocksdb_filterpolicy_t* rocksdb_filterpolicy_create(
void* state,
void (*destructor)(void*),
char* (*create_filter)(
@ -592,7 +688,7 @@ leveldb_filterpolicy_t* leveldb_filterpolicy_create(
const char* key, size_t length,
const char* filter, size_t filter_length),
const char* (*name)(void*)) {
leveldb_filterpolicy_t* result = new leveldb_filterpolicy_t;
rocksdb_filterpolicy_t* result = new rocksdb_filterpolicy_t;
result->state_ = state;
result->destructor_ = destructor;
result->create_ = create_filter;
@ -601,15 +697,15 @@ leveldb_filterpolicy_t* leveldb_filterpolicy_create(
return result;
}
void leveldb_filterpolicy_destroy(leveldb_filterpolicy_t* filter) {
void rocksdb_filterpolicy_destroy(rocksdb_filterpolicy_t* filter) {
delete filter;
}
leveldb_filterpolicy_t* leveldb_filterpolicy_create_bloom(int bits_per_key) {
// Make a leveldb_filterpolicy_t, but override all of its methods so
rocksdb_filterpolicy_t* rocksdb_filterpolicy_create_bloom(int bits_per_key) {
// Make a rocksdb_filterpolicy_t, but override all of its methods so
// they delegate to a NewBloomFilterPolicy() instead of user
// supplied C functions.
struct Wrapper : public leveldb_filterpolicy_t {
struct Wrapper : public rocksdb_filterpolicy_t {
const FilterPolicy* rep_;
~Wrapper() { delete rep_; }
const char* Name() const { return rep_->Name(); }
@ -628,64 +724,115 @@ leveldb_filterpolicy_t* leveldb_filterpolicy_create_bloom(int bits_per_key) {
return wrapper;
}
leveldb_readoptions_t* leveldb_readoptions_create() {
return new leveldb_readoptions_t;
rocksdb_readoptions_t* rocksdb_readoptions_create() {
return new rocksdb_readoptions_t;
}
void leveldb_readoptions_destroy(leveldb_readoptions_t* opt) {
void rocksdb_readoptions_destroy(rocksdb_readoptions_t* opt) {
delete opt;
}
void leveldb_readoptions_set_verify_checksums(
leveldb_readoptions_t* opt,
void rocksdb_readoptions_set_verify_checksums(
rocksdb_readoptions_t* opt,
unsigned char v) {
opt->rep.verify_checksums = v;
}
void leveldb_readoptions_set_fill_cache(
leveldb_readoptions_t* opt, unsigned char v) {
void rocksdb_readoptions_set_fill_cache(
rocksdb_readoptions_t* opt, unsigned char v) {
opt->rep.fill_cache = v;
}
void leveldb_readoptions_set_snapshot(
leveldb_readoptions_t* opt,
const leveldb_snapshot_t* snap) {
void rocksdb_readoptions_set_snapshot(
rocksdb_readoptions_t* opt,
const rocksdb_snapshot_t* snap) {
opt->rep.snapshot = (snap ? snap->rep : NULL);
}
leveldb_writeoptions_t* leveldb_writeoptions_create() {
return new leveldb_writeoptions_t;
rocksdb_writeoptions_t* rocksdb_writeoptions_create() {
return new rocksdb_writeoptions_t;
}
void leveldb_writeoptions_destroy(leveldb_writeoptions_t* opt) {
void rocksdb_writeoptions_destroy(rocksdb_writeoptions_t* opt) {
delete opt;
}
void leveldb_writeoptions_set_sync(
leveldb_writeoptions_t* opt, unsigned char v) {
void rocksdb_writeoptions_set_sync(
rocksdb_writeoptions_t* opt, unsigned char v) {
opt->rep.sync = v;
}
leveldb_cache_t* leveldb_cache_create_lru(size_t capacity) {
leveldb_cache_t* c = new leveldb_cache_t;
void rocksdb_writeoptions_disable_WAL(rocksdb_writeoptions_t* opt, int disable) {
opt->rep.disableWAL = disable;
}
rocksdb_cache_t* rocksdb_cache_create_lru(size_t capacity) {
rocksdb_cache_t* c = new rocksdb_cache_t;
c->rep = NewLRUCache(capacity);
return c;
}
void leveldb_cache_destroy(leveldb_cache_t* cache) {
void rocksdb_cache_destroy(rocksdb_cache_t* cache) {
delete cache;
}
leveldb_env_t* leveldb_create_default_env() {
leveldb_env_t* result = new leveldb_env_t;
rocksdb_env_t* rocksdb_create_default_env() {
rocksdb_env_t* result = new rocksdb_env_t;
result->rep = Env::Default();
result->is_default = true;
return result;
}
void leveldb_env_destroy(leveldb_env_t* env) {
void rocksdb_env_set_background_threads(rocksdb_env_t* env, int n) {
env->rep->SetBackgroundThreads(n);
}
void rocksdb_env_destroy(rocksdb_env_t* env) {
if (!env->is_default) delete env->rep;
delete env;
}
rocksdb_universal_compaction_options_t* rocksdb_universal_compaction_options_create() {
rocksdb_universal_compaction_options_t* result = new rocksdb_universal_compaction_options_t;
result->rep = new rocksdb::CompactionOptionsUniversal;
return result;
}
void rocksdb_universal_compaction_options_set_size_ratio(
rocksdb_universal_compaction_options_t* uco, int ratio) {
uco->rep->size_ratio = ratio;
}
void rocksdb_universal_compaction_options_set_min_merge_width(
rocksdb_universal_compaction_options_t* uco, int w) {
uco->rep->min_merge_width = w;
}
void rocksdb_universal_compaction_options_set_max_merge_width(
rocksdb_universal_compaction_options_t* uco, int w) {
uco->rep->max_merge_width = w;
}
void rocksdb_universal_compaction_options_set_max_size_amplification_percent(
rocksdb_universal_compaction_options_t* uco, int p) {
uco->rep->max_size_amplification_percent = p;
}
void rocksdb_universal_compaction_options_set_compression_size_percent(
rocksdb_universal_compaction_options_t* uco, int p) {
uco->rep->compression_size_percent = p;
}
void rocksdb_universal_compaction_options_set_stop_style(
rocksdb_universal_compaction_options_t* uco, int style) {
uco->rep->stop_style = static_cast<rocksdb::CompactionStopStyle>(style);
}
void rocksdb_universal_compaction_options_destroy(
rocksdb_universal_compaction_options_t* uco) {
delete uco->rep;
delete uco;
}
} // end extern "C"

212
db/c_test.c
View File

@ -62,30 +62,30 @@ static void Free(char** ptr) {
}
static void CheckGet(
leveldb_t* db,
const leveldb_readoptions_t* options,
rocksdb_t* db,
const rocksdb_readoptions_t* options,
const char* key,
const char* expected) {
char* err = NULL;
size_t val_len;
char* val;
val = leveldb_get(db, options, key, strlen(key), &val_len, &err);
val = rocksdb_get(db, options, key, strlen(key), &val_len, &err);
CheckNoError(err);
CheckEqual(expected, val, val_len);
Free(&val);
}
static void CheckIter(leveldb_iterator_t* iter,
static void CheckIter(rocksdb_iterator_t* iter,
const char* key, const char* val) {
size_t len;
const char* str;
str = leveldb_iter_key(iter, &len);
str = rocksdb_iter_key(iter, &len);
CheckEqual(key, str, len);
str = leveldb_iter_value(iter, &len);
str = rocksdb_iter_value(iter, &len);
CheckEqual(val, str, len);
}
// Callback from leveldb_writebatch_iterate()
// Callback from rocksdb_writebatch_iterate()
static void CheckPut(void* ptr,
const char* k, size_t klen,
const char* v, size_t vlen) {
@ -104,7 +104,7 @@ static void CheckPut(void* ptr,
(*state)++;
}
// Callback from leveldb_writebatch_iterate()
// Callback from rocksdb_writebatch_iterate()
static void CheckDel(void* ptr, const char* k, size_t klen) {
int* state = (int*) ptr;
CheckCondition(*state == 2);
@ -155,117 +155,117 @@ unsigned char FilterKeyMatch(
}
int main(int argc, char** argv) {
leveldb_t* db;
leveldb_comparator_t* cmp;
leveldb_cache_t* cache;
leveldb_env_t* env;
leveldb_options_t* options;
leveldb_readoptions_t* roptions;
leveldb_writeoptions_t* woptions;
rocksdb_t* db;
rocksdb_comparator_t* cmp;
rocksdb_cache_t* cache;
rocksdb_env_t* env;
rocksdb_options_t* options;
rocksdb_readoptions_t* roptions;
rocksdb_writeoptions_t* woptions;
char* err = NULL;
int run = -1;
snprintf(dbname, sizeof(dbname),
"%s/leveldb_c_test-%d",
"%s/rocksdb_c_test-%d",
GetTempDir(),
((int) geteuid()));
StartPhase("create_objects");
cmp = leveldb_comparator_create(NULL, CmpDestroy, CmpCompare, CmpName);
env = leveldb_create_default_env();
cache = leveldb_cache_create_lru(100000);
cmp = rocksdb_comparator_create(NULL, CmpDestroy, CmpCompare, CmpName);
env = rocksdb_create_default_env();
cache = rocksdb_cache_create_lru(100000);
options = leveldb_options_create();
leveldb_options_set_comparator(options, cmp);
leveldb_options_set_error_if_exists(options, 1);
leveldb_options_set_cache(options, cache);
leveldb_options_set_env(options, env);
leveldb_options_set_info_log(options, NULL);
leveldb_options_set_write_buffer_size(options, 100000);
leveldb_options_set_paranoid_checks(options, 1);
leveldb_options_set_max_open_files(options, 10);
leveldb_options_set_block_size(options, 1024);
leveldb_options_set_block_restart_interval(options, 8);
leveldb_options_set_compression(options, leveldb_no_compression);
leveldb_options_set_compression_options(options, -14, -1, 0);
int compression_levels[] = {leveldb_no_compression, leveldb_no_compression,
leveldb_no_compression, leveldb_no_compression};
leveldb_options_set_compression_per_level(options, compression_levels, 4);
options = rocksdb_options_create();
rocksdb_options_set_comparator(options, cmp);
rocksdb_options_set_error_if_exists(options, 1);
rocksdb_options_set_cache(options, cache);
rocksdb_options_set_env(options, env);
rocksdb_options_set_info_log(options, NULL);
rocksdb_options_set_write_buffer_size(options, 100000);
rocksdb_options_set_paranoid_checks(options, 1);
rocksdb_options_set_max_open_files(options, 10);
rocksdb_options_set_block_size(options, 1024);
rocksdb_options_set_block_restart_interval(options, 8);
rocksdb_options_set_compression(options, rocksdb_no_compression);
rocksdb_options_set_compression_options(options, -14, -1, 0);
int compression_levels[] = {rocksdb_no_compression, rocksdb_no_compression,
rocksdb_no_compression, rocksdb_no_compression};
rocksdb_options_set_compression_per_level(options, compression_levels, 4);
roptions = leveldb_readoptions_create();
leveldb_readoptions_set_verify_checksums(roptions, 1);
leveldb_readoptions_set_fill_cache(roptions, 0);
roptions = rocksdb_readoptions_create();
rocksdb_readoptions_set_verify_checksums(roptions, 1);
rocksdb_readoptions_set_fill_cache(roptions, 0);
woptions = leveldb_writeoptions_create();
leveldb_writeoptions_set_sync(woptions, 1);
woptions = rocksdb_writeoptions_create();
rocksdb_writeoptions_set_sync(woptions, 1);
StartPhase("destroy");
leveldb_destroy_db(options, dbname, &err);
rocksdb_destroy_db(options, dbname, &err);
Free(&err);
StartPhase("open_error");
db = leveldb_open(options, dbname, &err);
db = rocksdb_open(options, dbname, &err);
CheckCondition(err != NULL);
Free(&err);
StartPhase("open");
leveldb_options_set_create_if_missing(options, 1);
db = leveldb_open(options, dbname, &err);
rocksdb_options_set_create_if_missing(options, 1);
db = rocksdb_open(options, dbname, &err);
CheckNoError(err);
CheckGet(db, roptions, "foo", NULL);
StartPhase("put");
leveldb_put(db, woptions, "foo", 3, "hello", 5, &err);
rocksdb_put(db, woptions, "foo", 3, "hello", 5, &err);
CheckNoError(err);
CheckGet(db, roptions, "foo", "hello");
StartPhase("compactall");
leveldb_compact_range(db, NULL, 0, NULL, 0);
rocksdb_compact_range(db, NULL, 0, NULL, 0);
CheckGet(db, roptions, "foo", "hello");
StartPhase("compactrange");
leveldb_compact_range(db, "a", 1, "z", 1);
rocksdb_compact_range(db, "a", 1, "z", 1);
CheckGet(db, roptions, "foo", "hello");
StartPhase("writebatch");
{
leveldb_writebatch_t* wb = leveldb_writebatch_create();
leveldb_writebatch_put(wb, "foo", 3, "a", 1);
leveldb_writebatch_clear(wb);
leveldb_writebatch_put(wb, "bar", 3, "b", 1);
leveldb_writebatch_put(wb, "box", 3, "c", 1);
leveldb_writebatch_delete(wb, "bar", 3);
leveldb_write(db, woptions, wb, &err);
rocksdb_writebatch_t* wb = rocksdb_writebatch_create();
rocksdb_writebatch_put(wb, "foo", 3, "a", 1);
rocksdb_writebatch_clear(wb);
rocksdb_writebatch_put(wb, "bar", 3, "b", 1);
rocksdb_writebatch_put(wb, "box", 3, "c", 1);
rocksdb_writebatch_delete(wb, "bar", 3);
rocksdb_write(db, woptions, wb, &err);
CheckNoError(err);
CheckGet(db, roptions, "foo", "hello");
CheckGet(db, roptions, "bar", NULL);
CheckGet(db, roptions, "box", "c");
int pos = 0;
leveldb_writebatch_iterate(wb, &pos, CheckPut, CheckDel);
rocksdb_writebatch_iterate(wb, &pos, CheckPut, CheckDel);
CheckCondition(pos == 3);
leveldb_writebatch_destroy(wb);
rocksdb_writebatch_destroy(wb);
}
StartPhase("iter");
{
leveldb_iterator_t* iter = leveldb_create_iterator(db, roptions);
CheckCondition(!leveldb_iter_valid(iter));
leveldb_iter_seek_to_first(iter);
CheckCondition(leveldb_iter_valid(iter));
rocksdb_iterator_t* iter = rocksdb_create_iterator(db, roptions);
CheckCondition(!rocksdb_iter_valid(iter));
rocksdb_iter_seek_to_first(iter);
CheckCondition(rocksdb_iter_valid(iter));
CheckIter(iter, "box", "c");
leveldb_iter_next(iter);
rocksdb_iter_next(iter);
CheckIter(iter, "foo", "hello");
leveldb_iter_prev(iter);
rocksdb_iter_prev(iter);
CheckIter(iter, "box", "c");
leveldb_iter_prev(iter);
CheckCondition(!leveldb_iter_valid(iter));
leveldb_iter_seek_to_last(iter);
rocksdb_iter_prev(iter);
CheckCondition(!rocksdb_iter_valid(iter));
rocksdb_iter_seek_to_last(iter);
CheckIter(iter, "foo", "hello");
leveldb_iter_seek(iter, "b", 1);
rocksdb_iter_seek(iter, "b", 1);
CheckIter(iter, "box", "c");
leveldb_iter_get_error(iter, &err);
rocksdb_iter_get_error(iter, &err);
CheckNoError(err);
leveldb_iter_destroy(iter);
rocksdb_iter_destroy(iter);
}
StartPhase("approximate_sizes");
@ -279,39 +279,39 @@ int main(int argc, char** argv) {
size_t start_len[2] = { 1, 21 };
const char* limit[2] = { "k00000000000000010000", "z" };
size_t limit_len[2] = { 21, 1 };
leveldb_writeoptions_set_sync(woptions, 0);
rocksdb_writeoptions_set_sync(woptions, 0);
for (i = 0; i < n; i++) {
snprintf(keybuf, sizeof(keybuf), "k%020d", i);
snprintf(valbuf, sizeof(valbuf), "v%020d", i);
leveldb_put(db, woptions, keybuf, strlen(keybuf), valbuf, strlen(valbuf),
rocksdb_put(db, woptions, keybuf, strlen(keybuf), valbuf, strlen(valbuf),
&err);
CheckNoError(err);
}
leveldb_approximate_sizes(db, 2, start, start_len, limit, limit_len, sizes);
rocksdb_approximate_sizes(db, 2, start, start_len, limit, limit_len, sizes);
CheckCondition(sizes[0] > 0);
CheckCondition(sizes[1] > 0);
}
StartPhase("property");
{
char* prop = leveldb_property_value(db, "nosuchprop");
char* prop = rocksdb_property_value(db, "nosuchprop");
CheckCondition(prop == NULL);
prop = leveldb_property_value(db, "rocksdb.stats");
prop = rocksdb_property_value(db, "rocksdb.stats");
CheckCondition(prop != NULL);
Free(&prop);
}
StartPhase("snapshot");
{
const leveldb_snapshot_t* snap;
snap = leveldb_create_snapshot(db);
leveldb_delete(db, woptions, "foo", 3, &err);
const rocksdb_snapshot_t* snap;
snap = rocksdb_create_snapshot(db);
rocksdb_delete(db, woptions, "foo", 3, &err);
CheckNoError(err);
leveldb_readoptions_set_snapshot(roptions, snap);
rocksdb_readoptions_set_snapshot(roptions, snap);
CheckGet(db, roptions, "foo", "hello");
leveldb_readoptions_set_snapshot(roptions, NULL);
rocksdb_readoptions_set_snapshot(roptions, NULL);
CheckGet(db, roptions, "foo", NULL);
leveldb_release_snapshot(db, snap);
rocksdb_release_snapshot(db, snap);
}
StartPhase("repair");
@ -320,44 +320,44 @@ int main(int argc, char** argv) {
// files (https://reviews.facebook.net/D6123) would leave
// around deleted files and the repair process will find
// those files and put them back into the database.
leveldb_compact_range(db, NULL, 0, NULL, 0);
leveldb_close(db);
leveldb_options_set_create_if_missing(options, 0);
leveldb_options_set_error_if_exists(options, 0);
leveldb_repair_db(options, dbname, &err);
rocksdb_compact_range(db, NULL, 0, NULL, 0);
rocksdb_close(db);
rocksdb_options_set_create_if_missing(options, 0);
rocksdb_options_set_error_if_exists(options, 0);
rocksdb_repair_db(options, dbname, &err);
CheckNoError(err);
db = leveldb_open(options, dbname, &err);
db = rocksdb_open(options, dbname, &err);
CheckNoError(err);
CheckGet(db, roptions, "foo", NULL);
CheckGet(db, roptions, "bar", NULL);
CheckGet(db, roptions, "box", "c");
leveldb_options_set_create_if_missing(options, 1);
leveldb_options_set_error_if_exists(options, 1);
rocksdb_options_set_create_if_missing(options, 1);
rocksdb_options_set_error_if_exists(options, 1);
}
StartPhase("filter");
for (run = 0; run < 2; run++) {
// First run uses custom filter, second run uses bloom filter
CheckNoError(err);
leveldb_filterpolicy_t* policy;
rocksdb_filterpolicy_t* policy;
if (run == 0) {
policy = leveldb_filterpolicy_create(
policy = rocksdb_filterpolicy_create(
NULL, FilterDestroy, FilterCreate, FilterKeyMatch, FilterName);
} else {
policy = leveldb_filterpolicy_create_bloom(10);
policy = rocksdb_filterpolicy_create_bloom(10);
}
// Create new database
leveldb_close(db);
leveldb_destroy_db(options, dbname, &err);
leveldb_options_set_filter_policy(options, policy);
db = leveldb_open(options, dbname, &err);
rocksdb_close(db);
rocksdb_destroy_db(options, dbname, &err);
rocksdb_options_set_filter_policy(options, policy);
db = rocksdb_open(options, dbname, &err);
CheckNoError(err);
leveldb_put(db, woptions, "foo", 3, "foovalue", 8, &err);
rocksdb_put(db, woptions, "foo", 3, "foovalue", 8, &err);
CheckNoError(err);
leveldb_put(db, woptions, "bar", 3, "barvalue", 8, &err);
rocksdb_put(db, woptions, "bar", 3, "barvalue", 8, &err);
CheckNoError(err);
leveldb_compact_range(db, NULL, 0, NULL, 0);
rocksdb_compact_range(db, NULL, 0, NULL, 0);
fake_filter_result = 1;
CheckGet(db, roptions, "foo", "foovalue");
@ -372,18 +372,18 @@ int main(int argc, char** argv) {
CheckGet(db, roptions, "foo", "foovalue");
CheckGet(db, roptions, "bar", "barvalue");
}
leveldb_options_set_filter_policy(options, NULL);
leveldb_filterpolicy_destroy(policy);
rocksdb_options_set_filter_policy(options, NULL);
rocksdb_filterpolicy_destroy(policy);
}
StartPhase("cleanup");
leveldb_close(db);
leveldb_options_destroy(options);
leveldb_readoptions_destroy(roptions);
leveldb_writeoptions_destroy(woptions);
leveldb_cache_destroy(cache);
leveldb_comparator_destroy(cmp);
leveldb_env_destroy(env);
rocksdb_close(db);
rocksdb_options_destroy(options);
rocksdb_readoptions_destroy(roptions);
rocksdb_writeoptions_destroy(woptions);
rocksdb_cache_destroy(cache);
rocksdb_comparator_destroy(cmp);
rocksdb_env_destroy(env);
fprintf(stderr, "PASS\n");
return 0;

8
db/db_bench.cc
View File

@ -49,6 +49,7 @@ DEFINE_string(benchmarks,
"compact,"
"readrandom,"
"readseq,"
"readtocache,"
"readreverse,"
"readwhilewriting,"
"readrandomwriterandom,"
@ -76,6 +77,7 @@ DEFINE_string(benchmarks,
"\tdeleteseq -- delete N keys in sequential order\n"
"\tdeleterandom -- delete N keys in random order\n"
"\treadseq -- read N times sequentially\n"
"\treadtocache -- 1 thread reading database sequentially\n"
"\treadreverse -- read N times in reverse order\n"
"\treadrandom -- read N times in random order\n"
"\treadmissing -- read N missing keys in random order\n"
@ -150,7 +152,7 @@ DEFINE_double(compression_ratio, 0.5, "Arrange to generate values that shrink"
DEFINE_bool(histogram, false, "Print histogram of operation timings");
DEFINE_int32(write_buffer_size, rocksdb::Options().write_buffer_size,
DEFINE_int64(write_buffer_size, rocksdb::Options().write_buffer_size,
"Number of bytes to buffer in memtable before compacting");
DEFINE_int32(max_write_buffer_number,
@ -1062,6 +1064,10 @@ class Benchmark {
method = &Benchmark::WriteRandom;
} else if (name == Slice("readseq")) {
method = &Benchmark::ReadSequential;
} else if (name == Slice("readtocache")) {
method = &Benchmark::ReadSequential;
num_threads = 1;
reads_ = num_;
} else if (name == Slice("readreverse")) {
method = &Benchmark::ReadReverse;
} else if (name == Slice("readrandom")) {

348
db/db_impl.cc
View File

@ -241,6 +241,7 @@ DBImpl::DBImpl(const Options& options, const std::string& dbname)
mem_(new MemTable(internal_comparator_, mem_rep_factory_,
NumberLevels(), options_)),
logfile_number_(0),
super_version_(nullptr),
tmp_batch_(),
bg_compaction_scheduled_(0),
bg_flush_scheduled_(0),
@ -316,6 +317,13 @@ DBImpl::~DBImpl() {
bg_logstats_scheduled_) {
bg_cv_.Wait();
}
if (super_version_ != nullptr) {
bool is_last_reference __attribute__((unused));
is_last_reference = super_version_->Unref();
assert(is_last_reference);
super_version_->Cleanup();
delete super_version_;
}
mutex_.Unlock();
if (db_lock_ != nullptr) {
@ -345,6 +353,13 @@ void DBImpl::TEST_Destroy_DBImpl() {
bg_logstats_scheduled_) {
bg_cv_.Wait();
}
if (super_version_ != nullptr) {
bool is_last_reference __attribute__((unused));
is_last_reference = super_version_->Unref();
assert(is_last_reference);
super_version_->Cleanup();
delete super_version_;
}
// Prevent new compactions from occuring.
bg_work_gate_closed_ = true;
@ -443,6 +458,49 @@ void DBImpl::MaybeDumpStats() {
}
}
// DBImpl::SuperVersion methods
DBImpl::SuperVersion::SuperVersion(const int num_memtables) {
to_delete.resize(num_memtables);
}
DBImpl::SuperVersion::~SuperVersion() {
for (auto td : to_delete) {
delete td;
}
}
DBImpl::SuperVersion* DBImpl::SuperVersion::Ref() {
refs.fetch_add(1, std::memory_order_relaxed);
return this;
}
bool DBImpl::SuperVersion::Unref() {
assert(refs > 0);
// fetch_sub returns the previous value of ref
return refs.fetch_sub(1, std::memory_order_relaxed) == 1;
}
void DBImpl::SuperVersion::Cleanup() {
assert(refs.load(std::memory_order_relaxed) == 0);
imm.UnrefAll(&to_delete);
MemTable* m = mem->Unref();
if (m != nullptr) {
to_delete.push_back(m);
}
current->Unref();
}
void DBImpl::SuperVersion::Init(MemTable* new_mem, const MemTableList& new_imm,
Version* new_current) {
mem = new_mem;
imm = new_imm;
current = new_current;
mem->Ref();
imm.RefAll();
current->Ref();
refs.store(1, std::memory_order_relaxed);
}
// Returns the list of live files in 'sst_live' and the list
// of all files in the filesystem in 'all_files'.
// no_full_scan = true -- never do the full scan using GetChildren()
@ -518,11 +576,6 @@ void DBImpl::FindObsoleteFiles(DeletionState& deletion_state,
// It is not necessary to hold the mutex when invoking this method.
void DBImpl::PurgeObsoleteFiles(DeletionState& state) {
// free pending memtables
for (auto m : state.memtables_to_free) {
delete m;
}
// check if there is anything to do
if (!state.all_files.size() &&
!state.sst_delete_files.size() &&
@ -1041,6 +1094,7 @@ Status DBImpl::WriteLevel0TableForRecovery(MemTable* mem, VersionEdit* edit) {
stats.bytes_written = meta.file_size;
stats.files_out_levelnp1 = 1;
stats_[level].Add(stats);
RecordTick(options_.statistics.get(), COMPACT_WRITE_BYTES, meta.file_size);
return s;
}
@ -1129,6 +1183,7 @@ Status DBImpl::WriteLevel0Table(std::vector<MemTable*> &mems, VersionEdit* edit,
stats.micros = env_->NowMicros() - start_micros;
stats.bytes_written = meta.file_size;
stats_[level].Add(stats);
RecordTick(options_.statistics.get(), COMPACT_WRITE_BYTES, meta.file_size);
return s;
}
@ -1186,6 +1241,7 @@ Status DBImpl::FlushMemTableToOutputFile(bool* madeProgress,
file_number, pending_outputs_, &deletion_state.memtables_to_free);
if (s.ok()) {
InstallSuperVersion(deletion_state);
if (madeProgress) {
*madeProgress = 1;
}
@ -1245,11 +1301,17 @@ int DBImpl::FindMinimumEmptyLevelFitting(int level) {
void DBImpl::ReFitLevel(int level, int target_level) {
assert(level < NumberLevels());
MutexLock l(&mutex_);
SuperVersion* superversion_to_free = nullptr;
SuperVersion* new_superversion =
new SuperVersion(options_.max_write_buffer_number);
mutex_.Lock();
// only allow one thread refitting
if (refitting_level_) {
mutex_.Unlock();
Log(options_.info_log, "ReFitLevel: another thread is refitting");
delete new_superversion;
return;
}
refitting_level_ = true;
@ -1285,6 +1347,8 @@ void DBImpl::ReFitLevel(int level, int target_level) {
edit.DebugString().data());
auto status = versions_->LogAndApply(&edit, &mutex_);
superversion_to_free = InstallSuperVersion(new_superversion);
new_superversion = nullptr;
Log(options_.info_log, "LogAndApply: %s\n", status.ToString().data());
@ -1296,6 +1360,10 @@ void DBImpl::ReFitLevel(int level, int target_level) {
refitting_level_ = false;
bg_work_gate_closed_ = false;
mutex_.Unlock();
delete superversion_to_free;
delete new_superversion;
}
int DBImpl::NumberLevels() {
@ -1311,8 +1379,7 @@ int DBImpl::Level0StopWriteTrigger() {
}
Status DBImpl::Flush(const FlushOptions& options) {
Status status = FlushMemTable(options);
return status;
return FlushMemTable(options);
}
SequenceNumber DBImpl::GetLatestSequenceNumber() const {
@ -1669,7 +1736,7 @@ Status DBImpl::BackgroundFlush(bool* madeProgress,
void DBImpl::BackgroundCallFlush() {
bool madeProgress = false;
DeletionState deletion_state(options_.max_write_buffer_number);
DeletionState deletion_state(options_.max_write_buffer_number, true);
assert(bg_flush_scheduled_);
MutexLock l(&mutex_);
@ -1715,7 +1782,7 @@ void DBImpl::TEST_PurgeObsoleteteWAL() {
void DBImpl::BackgroundCallCompaction() {
bool madeProgress = false;
DeletionState deletion_state(options_.max_write_buffer_number);
DeletionState deletion_state(options_.max_write_buffer_number, true);
MaybeDumpStats();
@ -1768,7 +1835,7 @@ void DBImpl::BackgroundCallCompaction() {
}
Status DBImpl::BackgroundCompaction(bool* madeProgress,
DeletionState& deletion_state) {
DeletionState& deletion_state) {
*madeProgress = false;
mutex_.AssertHeld();
@ -1821,6 +1888,7 @@ Status DBImpl::BackgroundCompaction(bool* madeProgress,
f->smallest, f->largest,
f->smallest_seqno, f->largest_seqno);
status = versions_->LogAndApply(c->edit(), &mutex_);
InstallSuperVersion(deletion_state);
VersionSet::LevelSummaryStorage tmp;
Log(options_.info_log, "Moved #%lld to level-%d %lld bytes %s: %s\n",
static_cast<unsigned long long>(f->number),
@ -2454,14 +2522,22 @@ Status DBImpl::DoCompactionWork(CompactionState* compact,
}
stats.files_out_levelnp1 = num_output_files;
for (int i = 0; i < compact->compaction->num_input_files(0); i++)
for (int i = 0; i < compact->compaction->num_input_files(0); i++) {
stats.bytes_readn += compact->compaction->input(0, i)->file_size;
RecordTick(options_.statistics.get(), COMPACT_READ_BYTES,
compact->compaction->input(0, i)->file_size);
}
for (int i = 0; i < compact->compaction->num_input_files(1); i++)
for (int i = 0; i < compact->compaction->num_input_files(1); i++) {
stats.bytes_readnp1 += compact->compaction->input(1, i)->file_size;
RecordTick(options_.statistics.get(), COMPACT_READ_BYTES,
compact->compaction->input(1, i)->file_size);
}
for (int i = 0; i < num_output_files; i++) {
stats.bytes_written += compact->outputs[i].file_size;
RecordTick(options_.statistics.get(), COMPACT_WRITE_BYTES,
compact->outputs[i].file_size);
}
LogFlush(options_.info_log);
@ -2474,6 +2550,7 @@ Status DBImpl::DoCompactionWork(CompactionState* compact,
if (status.ok()) {
status = InstallCompactionResults(compact);
InstallSuperVersion(deletion_state);
}
VersionSet::LevelSummaryStorage tmp;
Log(options_.info_log,
@ -2581,6 +2658,44 @@ Status DBImpl::Get(const ReadOptions& options,
return GetImpl(options, key, value);
}
// DeletionState gets created and destructed outside of the lock -- we
// use this convinently to:
// * malloc one SuperVersion() outside of the lock -- new_superversion
// * delete one SuperVersion() outside of the lock -- superversion_to_free
//
// However, if InstallSuperVersion() gets called twice with the same,
// deletion_state, we can't reuse the SuperVersion() that got malloced because
// first call already used it. In that rare case, we take a hit and create a
// new SuperVersion() inside of the mutex. We do similar thing
// for superversion_to_free
void DBImpl::InstallSuperVersion(DeletionState& deletion_state) {
// if new_superversion == nullptr, it means somebody already used it
SuperVersion* new_superversion =
(deletion_state.new_superversion != nullptr) ?
deletion_state.new_superversion : new SuperVersion();
SuperVersion* old_superversion = InstallSuperVersion(new_superversion);
deletion_state.new_superversion = nullptr;
if (deletion_state.superversion_to_free != nullptr) {
// somebody already put it there
delete old_superversion;
} else {
deletion_state.superversion_to_free = old_superversion;
}
}
DBImpl::SuperVersion* DBImpl::InstallSuperVersion(
SuperVersion* new_superversion) {
mutex_.AssertHeld();
new_superversion->Init(mem_, imm_, versions_->current());
SuperVersion* old_superversion = super_version_;
super_version_ = new_superversion;
if (old_superversion != nullptr && old_superversion->Unref()) {
old_superversion->Cleanup();
return old_superversion; // will let caller delete outside of mutex
}
return nullptr;
}
Status DBImpl::GetImpl(const ReadOptions& options,
const Slice& key,
std::string* value,
@ -2591,28 +2706,21 @@ Status DBImpl::GetImpl(const ReadOptions& options,
StopWatchNano snapshot_timer(env_, false);
StartPerfTimer(&snapshot_timer);
SequenceNumber snapshot;
std::vector<MemTable*> to_delete;
to_delete.reserve(options_.max_write_buffer_number);
mutex_.Lock();
if (options.snapshot != nullptr) {
snapshot = reinterpret_cast<const SnapshotImpl*>(options.snapshot)->number_;
} else {
snapshot = versions_->LastSequence();
}
MemTable* mem = mem_;
MemTableList imm = imm_;
Version* current = versions_->current();
mem->Ref();
imm.RefAll();
current->Ref();
// Unlock while reading from files and memtables
// This can be replaced by using atomics and spinlock instead of big mutex
mutex_.Lock();
SuperVersion* get_version = super_version_->Ref();
mutex_.Unlock();
bool have_stat_update = false;
Version::GetStats stats;
// Prepare to store a list of merge operations if merge occurs.
MergeContext merge_context;
@ -2621,18 +2729,18 @@ Status DBImpl::GetImpl(const ReadOptions& options,
// merge_operands will contain the sequence of merges in the latter case.
LookupKey lkey(key, snapshot);
BumpPerfTime(&perf_context.get_snapshot_time, &snapshot_timer);
if (mem->Get(lkey, value, &s, merge_context, options_)) {
if (get_version->mem->Get(lkey, value, &s, merge_context, options_)) {
// Done
RecordTick(options_.statistics.get(), MEMTABLE_HIT);
} else if (imm.Get(lkey, value, &s, merge_context, options_)) {
} else if (get_version->imm.Get(lkey, value, &s, merge_context, options_)) {
// Done
RecordTick(options_.statistics.get(), MEMTABLE_HIT);
} else {
StopWatchNano from_files_timer(env_, false);
StartPerfTimer(&from_files_timer);
current->Get(options, lkey, value, &s, &merge_context, &stats,
options_, value_found);
get_version->current->Get(options, lkey, value, &s, &merge_context, &stats,
options_, value_found);
have_stat_update = true;
BumpPerfTime(&perf_context.get_from_output_files_time, &from_files_timer);
RecordTick(options_.statistics.get(), MEMTABLE_MISS);
@ -2640,22 +2748,30 @@ Status DBImpl::GetImpl(const ReadOptions& options,
StopWatchNano post_process_timer(env_, false);
StartPerfTimer(&post_process_timer);
mutex_.Lock();
if (!options_.disable_seek_compaction &&
have_stat_update && current->UpdateStats(stats)) {
MaybeScheduleFlushOrCompaction();
bool delete_get_version = false;
if (!options_.disable_seek_compaction && have_stat_update) {
mutex_.Lock();
if (get_version->current->UpdateStats(stats)) {
MaybeScheduleFlushOrCompaction();
}
if (get_version->Unref()) {
get_version->Cleanup();
delete_get_version = true;
}
mutex_.Unlock();
} else {
if (get_version->Unref()) {
mutex_.Lock();
get_version->Cleanup();
mutex_.Unlock();
delete_get_version = true;
}
}
if (delete_get_version) {
delete get_version;
}
MemTable* m = mem->Unref();
imm.UnrefAll(&to_delete);
current->Unref();
mutex_.Unlock();
// free up all obsolete memtables outside the mutex
delete m;
for (MemTable* v: to_delete) delete v;
LogFlush(options_.info_log);
// Note, tickers are atomic now - no lock protection needed any more.
RecordTick(options_.statistics.get(), NUMBER_KEYS_READ);
@ -2673,7 +2789,6 @@ std::vector<Status> DBImpl::MultiGet(const ReadOptions& options,
SequenceNumber snapshot;
std::vector<MemTable*> to_delete;
to_delete.reserve(options_.max_write_buffer_number);
mutex_.Lock();
if (options.snapshot != nullptr) {
@ -2748,8 +2863,6 @@ std::vector<Status> DBImpl::MultiGet(const ReadOptions& options,
delete m;
for (MemTable* v: to_delete) delete v;
LogFlush(options_.info_log);
RecordTick(options_.statistics.get(), NUMBER_MULTIGET_CALLS);
RecordTick(options_.statistics.get(), NUMBER_MULTIGET_KEYS_READ, numKeys);
RecordTick(options_.statistics.get(), NUMBER_MULTIGET_BYTES_READ, bytesRead);
@ -2831,17 +2944,27 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* my_batch) {
w.done = false;
StopWatch sw(env_, options_.statistics.get(), DB_WRITE);
MutexLock l(&mutex_);
mutex_.Lock();
writers_.push_back(&w);
while (!w.done && &w != writers_.front()) {
w.cv.Wait();
}
if (!options.disableWAL) {
RecordTick(options_.statistics.get(), WRITE_WITH_WAL, 1);
}
if (w.done) {
mutex_.Unlock();
RecordTick(options_.statistics.get(), WRITE_DONE_BY_OTHER, 1);
return w.status;
} else {
RecordTick(options_.statistics.get(), WRITE_DONE_BY_SELF, 1);
}
// May temporarily unlock and wait.
Status status = MakeRoomForWrite(my_batch == nullptr);
SuperVersion* superversion_to_free = nullptr;
Status status = MakeRoomForWrite(my_batch == nullptr, &superversion_to_free);
uint64_t last_sequence = versions_->LastSequence();
Writer* last_writer = &w;
if (status.ok() && my_batch != nullptr) { // nullptr batch is for compactions
@ -2877,7 +3000,10 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* my_batch) {
if (!options.disableWAL) {
StopWatchNano timer(env_);
StartPerfTimer(&timer);
status = log_->AddRecord(WriteBatchInternal::Contents(updates));
Slice log_entry = WriteBatchInternal::Contents(updates);
status = log_->AddRecord(log_entry);
RecordTick(options_.statistics.get(), WAL_FILE_SYNCED, 1);
RecordTick(options_.statistics.get(), WAL_FILE_BYTES, log_entry.size());
if (status.ok() && options.sync) {
if (options_.use_fsync) {
StopWatch(env_, options_.statistics.get(), WAL_FILE_SYNC_MICROS);
@ -2906,7 +3032,6 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* my_batch) {
SEQUENCE_NUMBER, last_sequence);
}
StartPerfTimer(&pre_post_process_timer);
LogFlush(options_.info_log);
mutex_.Lock();
if (status.ok()) {
versions_->SetLastSequence(last_sequence);
@ -2933,6 +3058,8 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* my_batch) {
if (!writers_.empty()) {
writers_.front()->cv.Signal();
}
mutex_.Unlock();
delete superversion_to_free;
BumpPerfTime(&perf_context.write_pre_and_post_process_time,
&pre_post_process_timer);
return status;
@ -3027,7 +3154,8 @@ uint64_t DBImpl::SlowdownAmount(int n, int top, int bottom) {
// REQUIRES: mutex_ is held
// REQUIRES: this thread is currently at the front of the writer queue
Status DBImpl::MakeRoomForWrite(bool force) {
Status DBImpl::MakeRoomForWrite(bool force,
SuperVersion** superversion_to_free) {
mutex_.AssertHeld();
assert(!writers_.empty());
bool allow_delay = !force;
@ -3036,6 +3164,7 @@ Status DBImpl::MakeRoomForWrite(bool force) {
uint64_t rate_limit_delay_millis = 0;
Status s;
double score;
*superversion_to_free = nullptr;
while (true) {
if (!bg_error_.ok()) {
@ -3162,6 +3291,7 @@ Status DBImpl::MakeRoomForWrite(bool force) {
// Do this without holding the dbmutex lock.
assert(versions_->PrevLogNumber() == 0);
uint64_t new_log_number = versions_->NewFileNumber();
SuperVersion* new_superversion = nullptr;
mutex_.Unlock();
{
EnvOptions soptions(storage_options_);
@ -3178,6 +3308,7 @@ Status DBImpl::MakeRoomForWrite(bool force) {
lfile->SetPreallocationBlockSize(1.1 * options_.write_buffer_size);
memtmp = new MemTable(
internal_comparator_, mem_rep_factory_, NumberLevels(), options_);
new_superversion = new SuperVersion(options_.max_write_buffer_number);
}
}
mutex_.Lock();
@ -3202,11 +3333,16 @@ Status DBImpl::MakeRoomForWrite(bool force) {
mem_->SetLogNumber(logfile_number_);
force = false; // Do not force another compaction if have room
MaybeScheduleFlushOrCompaction();
*superversion_to_free = InstallSuperVersion(new_superversion);
}
}
return s;
}
const std::string& DBImpl::GetName() const {
return dbname_;
}
Env* DBImpl::GetEnv() const {
return env_;
}
@ -3256,6 +3392,13 @@ bool DBImpl::GetProperty(const Slice& property, std::string* value) {
} else if (in == "stats") {
char buf[1000];
uint64_t wal_bytes = 0;
uint64_t wal_synced = 0;
uint64_t user_bytes_written = 0;
uint64_t write_other = 0;
uint64_t write_self = 0;
uint64_t write_with_wal = 0;
uint64_t total_bytes_written = 0;
uint64_t total_bytes_read = 0;
uint64_t micros_up = env_->NowMicros() - started_at_;
@ -3268,6 +3411,16 @@ bool DBImpl::GetProperty(const Slice& property, std::string* value) {
uint64_t interval_bytes_new = 0;
double interval_seconds_up = 0;
Statistics* s = options_.statistics.get();
if (s) {
wal_bytes = s->getTickerCount(WAL_FILE_BYTES);
wal_synced = s->getTickerCount(WAL_FILE_SYNCED);
user_bytes_written = s->getTickerCount(BYTES_WRITTEN);
write_other = s->getTickerCount(WRITE_DONE_BY_OTHER);
write_self = s->getTickerCount(WRITE_DONE_BY_SELF);
write_with_wal = s->getTickerCount(WRITE_WITH_WAL);
}
// Pardon the long line but I think it is easier to read this way.
snprintf(buf, sizeof(buf),
" Compactions\n"
@ -3324,19 +3477,38 @@ bool DBImpl::GetProperty(const Slice& property, std::string* value) {
}
}
interval_bytes_new = stats_[0].bytes_written - last_stats_.bytes_new_;
interval_bytes_read = total_bytes_read - last_stats_.bytes_read_;
interval_bytes_written = total_bytes_written - last_stats_.bytes_written_;
interval_bytes_new = user_bytes_written - last_stats_.ingest_bytes_;
interval_bytes_read = total_bytes_read - last_stats_.compaction_bytes_read_;
interval_bytes_written =
total_bytes_written - last_stats_.compaction_bytes_written_;
interval_seconds_up = seconds_up - last_stats_.seconds_up_;
snprintf(buf, sizeof(buf), "Uptime(secs): %.1f total, %.1f interval\n",
seconds_up, interval_seconds_up);
value->append(buf);
snprintf(buf, sizeof(buf),
"Writes cumulative: %llu total, %llu batches, "
"%.1f per batch, %.2f ingest GB\n",
(unsigned long long) (write_other + write_self),
(unsigned long long) write_self,
(write_other + write_self) / (double) (write_self + 1),
user_bytes_written / (1048576.0 * 1024));
value->append(buf);
snprintf(buf, sizeof(buf),
"WAL cumulative: %llu WAL writes, %llu WAL syncs, "
"%.2f writes per sync, %.2f GB written\n",
(unsigned long long) write_with_wal,
(unsigned long long ) wal_synced,
write_with_wal / (double) (wal_synced + 1),
wal_bytes / (1048576.0 * 1024));
value->append(buf);
snprintf(buf, sizeof(buf),
"Compaction IO cumulative (GB): "
"%.2f new, %.2f read, %.2f write, %.2f read+write\n",
stats_[0].bytes_written / (1048576.0 * 1024),
user_bytes_written / (1048576.0 * 1024),
total_bytes_read / (1048576.0 * 1024),
total_bytes_written / (1048576.0 * 1024),
(total_bytes_read + total_bytes_written) / (1048576.0 * 1024));
@ -3345,7 +3517,7 @@ bool DBImpl::GetProperty(const Slice& property, std::string* value) {
snprintf(buf, sizeof(buf),
"Compaction IO cumulative (MB/sec): "
"%.1f new, %.1f read, %.1f write, %.1f read+write\n",
stats_[0].bytes_written / 1048576.0 / seconds_up,
user_bytes_written / 1048576.0 / seconds_up,
total_bytes_read / 1048576.0 / seconds_up,
total_bytes_written / 1048576.0 / seconds_up,
(total_bytes_read + total_bytes_written) / 1048576.0 / seconds_up);
@ -3354,9 +3526,38 @@ bool DBImpl::GetProperty(const Slice& property, std::string* value) {
// +1 to avoid divide by 0 and NaN
snprintf(buf, sizeof(buf),
"Amplification cumulative: %.1f write, %.1f compaction\n",
(double) total_bytes_written / (stats_[0].bytes_written+1),
(double) (total_bytes_written + total_bytes_read)
/ (stats_[0].bytes_written+1));
(double) (total_bytes_written + wal_bytes)
/ (user_bytes_written + 1),
(double) (total_bytes_written + total_bytes_read + wal_bytes)
/ (user_bytes_written + 1));
value->append(buf);
uint64_t interval_write_other = write_other - last_stats_.write_other_;
uint64_t interval_write_self = write_self - last_stats_.write_self_;
snprintf(buf, sizeof(buf),
"Writes interval: %llu total, %llu batches, "
"%.1f per batch, %.1f ingest MB\n",
(unsigned long long) (interval_write_other + interval_write_self),
(unsigned long long) interval_write_self,
(double) (interval_write_other + interval_write_self)
/ (interval_write_self + 1),
(user_bytes_written - last_stats_.ingest_bytes_) / 1048576.0);
value->append(buf);
uint64_t interval_write_with_wal =
write_with_wal - last_stats_.write_with_wal_;
uint64_t interval_wal_synced = wal_synced - last_stats_.wal_synced_;
uint64_t interval_wal_bytes = wal_bytes - last_stats_.wal_bytes_;
snprintf(buf, sizeof(buf),
"WAL interval: %llu WAL writes, %llu WAL syncs, "
"%.2f writes per sync, %.2f MB written\n",
(unsigned long long) interval_write_with_wal,
(unsigned long long ) interval_wal_synced,
interval_write_with_wal / (double) (interval_wal_synced + 1),
interval_wal_bytes / (1048576.0 * 1024));
value->append(buf);
snprintf(buf, sizeof(buf),
@ -3381,9 +3582,10 @@ bool DBImpl::GetProperty(const Slice& property, std::string* value) {
// +1 to avoid divide by 0 and NaN
snprintf(buf, sizeof(buf),
"Amplification interval: %.1f write, %.1f compaction\n",
(double) interval_bytes_written / (interval_bytes_new+1),
(double) (interval_bytes_written + interval_bytes_read) /
(interval_bytes_new+1));
(double) (interval_bytes_written + wal_bytes)
/ (interval_bytes_new + 1),
(double) (interval_bytes_written + interval_bytes_read + wal_bytes)
/ (interval_bytes_new + 1));
value->append(buf);
snprintf(buf, sizeof(buf),
@ -3404,10 +3606,15 @@ bool DBImpl::GetProperty(const Slice& property, std::string* value) {
(unsigned long) total_slowdown_count);
value->append(buf);
last_stats_.bytes_read_ = total_bytes_read;
last_stats_.bytes_written_ = total_bytes_written;
last_stats_.bytes_new_ = stats_[0].bytes_written;
last_stats_.compaction_bytes_read_ = total_bytes_read;
last_stats_.compaction_bytes_written_ = total_bytes_written;
last_stats_.ingest_bytes_ = user_bytes_written;
last_stats_.seconds_up_ = seconds_up;
last_stats_.wal_bytes_ = wal_bytes;
last_stats_.wal_synced_ = wal_synced;
last_stats_.write_with_wal_ = write_with_wal;
last_stats_.write_other_ = write_other;
last_stats_.write_self_ = write_self;
return true;
} else if (in == "sstables") {
@ -3482,7 +3689,7 @@ Status DBImpl::DeleteFile(std::string name) {
FileMetaData metadata;
int maxlevel = NumberLevels();
VersionEdit edit(maxlevel);
DeletionState deletion_state;
DeletionState deletion_state(0, true);
{
MutexLock l(&mutex_);
status = versions_->GetMetadataForFile(number, &level, &metadata);
@ -3512,14 +3719,14 @@ Status DBImpl::DeleteFile(std::string name) {
}
edit.DeleteFile(level, number);
status = versions_->LogAndApply(&edit, &mutex_);
if (status.ok()) {
InstallSuperVersion(deletion_state);
}
FindObsoleteFiles(deletion_state, false);
} // lock released here
LogFlush(options_.info_log);
if (status.ok()) {
// remove files outside the db-lock
PurgeObsoleteFiles(deletion_state);
}
// remove files outside the db-lock
PurgeObsoleteFiles(deletion_state);
return status;
}
@ -3619,6 +3826,7 @@ Status DB::Open(const Options& options, const std::string& dbname, DB** dbptr) {
s = impl->versions_->LogAndApply(&edit, &impl->mutex_);
}
if (s.ok()) {
delete impl->InstallSuperVersion(new DBImpl::SuperVersion());
impl->mem_->SetLogNumber(impl->logfile_number_);
impl->DeleteObsoleteFiles();
impl->MaybeScheduleFlushOrCompaction();

95
db/db_impl.h
View File

@ -67,6 +67,7 @@ class DBImpl : public DB {
virtual int NumberLevels();
virtual int MaxMemCompactionLevel();
virtual int Level0StopWriteTrigger();
virtual const std::string& GetName() const;
virtual Env* GetEnv() const;
virtual const Options& GetOptions() const;
virtual Status Flush(const FlushOptions& options);
@ -127,12 +128,38 @@ class DBImpl : public DB {
default_interval_to_delete_obsolete_WAL_ = default_interval_to_delete_obsolete_WAL;
}
// needed for CleanupIteratorState
// holds references to memtable, all immutable memtables and version
struct SuperVersion {
MemTable* mem;
MemTableList imm;
Version* current;
std::atomic<uint32_t> refs;
// We need to_delete because during Cleanup(), imm.UnrefAll() returns
// all memtables that we need to free through this vector. We then
// delete all those memtables outside of mutex, during destruction
std::vector<MemTable*> to_delete;
// should be called outside the mutex
explicit SuperVersion(const int num_memtables = 0);
~SuperVersion();
SuperVersion* Ref();
// Returns true if this was the last reference and caller should
// call Clenaup() and delete the object
bool Unref();
// call these two methods with db mutex held
// Cleanup unrefs mem, imm and current. Also, it stores all memtables
// that needs to be deleted in to_delete vector. Unrefing those
// objects needs to be done in the mutex
void Cleanup();
void Init(MemTable* new_mem, const MemTableList& new_imm,
Version* new_current);
};
// needed for CleanupIteratorState
struct DeletionState {
inline bool HaveSomethingToDelete() const {
return memtables_to_free.size() ||
all_files.size() ||
return all_files.size() ||
sst_delete_files.size() ||
log_delete_files.size();
}
@ -154,15 +181,35 @@ class DBImpl : public DB {
// a list of memtables to be free
std::vector<MemTable *> memtables_to_free;
SuperVersion* superversion_to_free; // if nullptr nothing to free
SuperVersion* new_superversion; // if nullptr no new superversion
// the current manifest_file_number, log_number and prev_log_number
// that corresponds to the set of files in 'live'.
uint64_t manifest_file_number, log_number, prev_log_number;
explicit DeletionState(const int num_memtables = 0) {
explicit DeletionState(const int num_memtables = 0,
bool create_superversion = false) {
manifest_file_number = 0;
log_number = 0;
prev_log_number = 0;
memtables_to_free.reserve(num_memtables);
superversion_to_free = nullptr;
new_superversion =
create_superversion ? new SuperVersion(num_memtables) : nullptr;
}
~DeletionState() {
// free pending memtables
for (auto m : memtables_to_free) {
delete m;
}
// free superversion. if nullptr, this will be noop
delete superversion_to_free;
// if new_superversion was not used, it will be non-nullptr and needs
// to be freed here
delete new_superversion;
}
};
@ -239,7 +286,11 @@ class DBImpl : public DB {
uint64_t* filenumber);
uint64_t SlowdownAmount(int n, int top, int bottom);
Status MakeRoomForWrite(bool force /* compact even if there is room? */);
// MakeRoomForWrite will return superversion_to_free through an arugment,
// which the caller needs to delete. We do it because caller can delete
// the superversion outside of mutex
Status MakeRoomForWrite(bool force /* compact even if there is room? */,
SuperVersion** superversion_to_free);
WriteBatch* BuildBatchGroup(Writer** last_writer);
// Force current memtable contents to be flushed.
@ -323,6 +374,8 @@ class DBImpl : public DB {
uint64_t logfile_number_;
unique_ptr<log::Writer> log_;
SuperVersion* super_version_;
std::string host_name_;
// Queue of writers.
@ -440,15 +493,25 @@ class DBImpl : public DB {
// Used to compute per-interval statistics
struct StatsSnapshot {
uint64_t bytes_read_;
uint64_t bytes_written_;
uint64_t bytes_new_;
uint64_t compaction_bytes_read_; // Bytes read by compaction
uint64_t compaction_bytes_written_; // Bytes written by compaction
uint64_t ingest_bytes_; // Bytes written by user
uint64_t wal_bytes_; // Bytes written to WAL
uint64_t wal_synced_; // Number of times WAL is synced
uint64_t write_with_wal_; // Number of writes that request WAL
// These count the number of writes processed by the calling thread or
// another thread.
uint64_t write_other_;
uint64_t write_self_;
double seconds_up_;
StatsSnapshot() : bytes_read_(0), bytes_written_(0),
bytes_new_(0), seconds_up_(0) {}
StatsSnapshot() : compaction_bytes_read_(0), compaction_bytes_written_(0),
ingest_bytes_(0), wal_bytes_(0), wal_synced_(0),
write_with_wal_(0), write_other_(0), write_self_(0),
seconds_up_(0) {}
};
// Counters from the previous time per-interval stats were computed
StatsSnapshot last_stats_;
static const int KEEP_LOG_FILE_NUM = 1000;
@ -480,6 +543,18 @@ class DBImpl : public DB {
std::vector<SequenceNumber>& snapshots,
SequenceNumber* prev_snapshot);
// will return a pointer to SuperVersion* if previous SuperVersion
// if its reference count is zero and needs deletion or nullptr if not
// As argument takes a pointer to allocated SuperVersion
// Foreground threads call this function directly (they don't carry
// deletion state and have to handle their own creation and deletion
// of SuperVersion)
SuperVersion* InstallSuperVersion(SuperVersion* new_superversion);
// Background threads call this function, which is just a wrapper around
// the InstallSuperVersion() function above. Background threads carry
// deletion_state which can have new_superversion already allocated.
void InstallSuperVersion(DeletionState& deletion_state);
// Function that Get and KeyMayExist call with no_io true or false
// Note: 'value_found' from KeyMayExist propagates here
Status GetImpl(const ReadOptions& options,

182
db/db_test.cc
View File

@ -701,23 +701,25 @@ static std::string Key(int i) {
return std::string(buf);
}
TEST(DBTest, Empty) {
/*
TEST(DBTest, GetFromImmutableLayer) {
do {
ASSERT_TRUE(db_ != nullptr);
ASSERT_EQ("NOT_FOUND", Get("foo"));
} while (ChangeOptions());
}
Options options = CurrentOptions();
options.env = env_;
options.write_buffer_size = 100000; // Small write buffer
Reopen(&options);
TEST(DBTest, ReadWrite) {
do {
ASSERT_OK(Put("foo", "v1"));
ASSERT_EQ("v1", Get("foo"));
ASSERT_OK(Put("bar", "v2"));
ASSERT_OK(Put("foo", "v3"));
ASSERT_EQ("v3", Get("foo"));
ASSERT_EQ("v2", Get("bar"));
env_->delay_sstable_sync_.Release_Store(env_); // Block sync calls
Put("k1", std::string(100000, 'x')); // Fill memtable
Put("k2", std::string(100000, 'y')); // Trigger compaction
ASSERT_EQ("v1", Get("foo"));
env_->delay_sstable_sync_.Release_Store(nullptr); // Release sync calls
} while (ChangeOptions());
}
*/
// Make sure that when options.block_cache is set, after a new table is
// created its index/filter blocks are added to block cache.
@ -731,7 +733,7 @@ TEST(DBTest, IndexAndFilterBlocksOfNewTableAddedToCache) {
ASSERT_OK(db_->Put(WriteOptions(), "key", "val"));
// Create a new talbe.
dbfull()->Flush(FlushOptions());
ASSERT_OK(dbfull()->Flush(FlushOptions()));
// index/filter blocks added to block cache right after table creation.
ASSERT_EQ(1,
@ -776,157 +778,6 @@ TEST(DBTest, IndexAndFilterBlocksOfNewTableAddedToCache) {
options.statistics.get()->getTickerCount(BLOCK_CACHE_FILTER_HIT));
}
TEST(DBTest, LevelLimitReopen) {
Options options = CurrentOptions();
Reopen(&options);
const std::string value(1024 * 1024, ' ');
int i = 0;
while (NumTableFilesAtLevel(2) == 0) {
ASSERT_OK(Put(Key(i++), value));
}
options.num_levels = 1;
options.max_bytes_for_level_multiplier_additional.resize(1, 1);
Status s = TryReopen(&options);
ASSERT_EQ(s.IsCorruption(), true);
ASSERT_EQ(s.ToString(),
"Corruption: VersionEdit: db already has "
"more levels than options.num_levels");
options.num_levels = 10;
options.max_bytes_for_level_multiplier_additional.resize(10, 1);
ASSERT_OK(TryReopen(&options));
}
TEST(DBTest, Preallocation) {
const std::string src = dbname_ + "/alloc_test";
unique_ptr<WritableFile> srcfile;
const EnvOptions soptions;
ASSERT_OK(env_->NewWritableFile(src, &srcfile, soptions));
srcfile->SetPreallocationBlockSize(1024 * 1024);
// No writes should mean no preallocation
size_t block_size, last_allocated_block;
srcfile->GetPreallocationStatus(&block_size, &last_allocated_block);
ASSERT_EQ(last_allocated_block, 0UL);
// Small write should preallocate one block
srcfile->Append("test");
srcfile->GetPreallocationStatus(&block_size, &last_allocated_block);
ASSERT_EQ(last_allocated_block, 1UL);
// Write an entire preallocation block, make sure we increased by two.
std::string buf(block_size, ' ');
srcfile->Append(buf);
srcfile->GetPreallocationStatus(&block_size, &last_allocated_block);
ASSERT_EQ(last_allocated_block, 2UL);
// Write five more blocks at once, ensure we're where we need to be.
buf = std::string(block_size * 5, ' ');
srcfile->Append(buf);
srcfile->GetPreallocationStatus(&block_size, &last_allocated_block);
ASSERT_EQ(last_allocated_block, 7UL);
}
TEST(DBTest, PutDeleteGet) {
do {
ASSERT_OK(db_->Put(WriteOptions(), "foo", "v1"));
ASSERT_EQ("v1", Get("foo"));
ASSERT_OK(db_->Put(WriteOptions(), "foo", "v2"));
ASSERT_EQ("v2", Get("foo"));
ASSERT_OK(db_->Delete(WriteOptions(), "foo"));
ASSERT_EQ("NOT_FOUND", Get("foo"));
} while (ChangeOptions());
}
TEST(DBTest, GetFromImmutableLayer) {
do {
Options options = CurrentOptions();
options.env = env_;
options.write_buffer_size = 100000; // Small write buffer
Reopen(&options);
ASSERT_OK(Put("foo", "v1"));
ASSERT_EQ("v1", Get("foo"));
env_->delay_sstable_sync_.Release_Store(env_); // Block sync calls
Put("k1", std::string(100000, 'x')); // Fill memtable
Put("k2", std::string(100000, 'y')); // Trigger compaction
ASSERT_EQ("v1", Get("foo"));
env_->delay_sstable_sync_.Release_Store(nullptr); // Release sync calls
} while (ChangeOptions());
}
TEST(DBTest, GetFromVersions) {
do {
ASSERT_OK(Put("foo", "v1"));
dbfull()->TEST_FlushMemTable();
ASSERT_EQ("v1", Get("foo"));
} while (ChangeOptions());
}
TEST(DBTest, GetSnapshot) {
do {
// Try with both a short key and a long key
for (int i = 0; i < 2; i++) {
std::string key = (i == 0) ? std::string("foo") : std::string(200, 'x');
ASSERT_OK(Put(key, "v1"));
const Snapshot* s1 = db_->GetSnapshot();
ASSERT_OK(Put(key, "v2"));
ASSERT_EQ("v2", Get(key));
ASSERT_EQ("v1", Get(key, s1));
dbfull()->TEST_FlushMemTable();
ASSERT_EQ("v2", Get(key));
ASSERT_EQ("v1", Get(key, s1));
db_->ReleaseSnapshot(s1);
}
} while (ChangeOptions());
}
TEST(DBTest, GetLevel0Ordering) {
do {
// Check that we process level-0 files in correct order. The code
// below generates two level-0 files where the earlier one comes
// before the later one in the level-0 file list since the earlier
// one has a smaller "smallest" key.
ASSERT_OK(Put("bar", "b"));
ASSERT_OK(Put("foo", "v1"));
dbfull()->TEST_FlushMemTable();
ASSERT_OK(Put("foo", "v2"));
dbfull()->TEST_FlushMemTable();
ASSERT_EQ("v2", Get("foo"));
} while (ChangeOptions());
}
TEST(DBTest, GetOrderedByLevels) {
do {
ASSERT_OK(Put("foo", "v1"));
Compact("a", "z");
ASSERT_EQ("v1", Get("foo"));
ASSERT_OK(Put("foo", "v2"));
ASSERT_EQ("v2", Get("foo"));
dbfull()->TEST_FlushMemTable();
ASSERT_EQ("v2", Get("foo"));
} while (ChangeOptions());
}
TEST(DBTest, GetPicksCorrectFile) {
do {
// Arrange to have multiple files in a non-level-0 level.
ASSERT_OK(Put("a", "va"));
Compact("a", "b");
ASSERT_OK(Put("x", "vx"));
Compact("x", "y");
ASSERT_OK(Put("f", "vf"));
Compact("f", "g");
ASSERT_EQ("va", Get("a"));
ASSERT_EQ("vf", Get("f"));
ASSERT_EQ("vx", Get("x"));
} while (ChangeOptions());
}
TEST(DBTest, GetEncountersEmptyLevel) {
do {
// Arrange for the following to happen:
@ -4510,6 +4361,10 @@ class ModelDB: public DB {
return -1;
}
virtual const std::string& GetName() const {
return name_;
}
virtual Env* GetEnv() const {
return nullptr;
}
@ -4587,6 +4442,7 @@ class ModelDB: public DB {
};
const Options options_;
KVMap map_;
std::string name_ = "";
};
static std::string RandomKey(Random* rnd, int minimum = 0) {

2
db/memtable.cc
View File

@ -279,7 +279,7 @@ bool MemTable::Get(const LookupKey& key, std::string* value, Status* s,
*s = Status::Corruption("Error: Could not perform merge.");
}
} else {
*s = Status::NotFound(Slice());
*s = Status::NotFound();
}
found_final_value = true;
break;

10
db/table_cache.cc
View File

@ -50,9 +50,8 @@ Status TableCache::FindTable(const EnvOptions& toptions,
Cache::Handle** handle, bool* table_io,
const bool no_io) {
Status s;
char buf[sizeof(file_number)];
EncodeFixed64(buf, file_number);
Slice key(buf, sizeof(buf));
Slice key(reinterpret_cast<const char*>(&file_number), sizeof(file_number));
*handle = cache_->Lookup(key);
if (*handle == nullptr) {
if (no_io) { // Dont do IO and return a not-found status
@ -165,9 +164,8 @@ bool TableCache::PrefixMayMatch(const ReadOptions& options,
}
void TableCache::Evict(uint64_t file_number) {
char buf[sizeof(file_number)];
EncodeFixed64(buf, file_number);
cache_->Erase(Slice(buf, sizeof(buf)));
Slice key(reinterpret_cast<const char*>(&file_number), sizeof(file_number));
cache_->Erase(key);
}
} // namespace rocksdb

16
db/version_set.cc
View File

@ -545,7 +545,7 @@ void Version::Get(const ReadOptions& options,
case kFound:
return;
case kDeleted:
*status = Status::NotFound(Slice()); // Use empty error message for speed
*status = Status::NotFound(); // Use empty error message for speed
return;
case kCorrupt:
*status = Status::Corruption("corrupted key for ", user_key);
@ -570,7 +570,7 @@ void Version::Get(const ReadOptions& options,
user_key);
}
} else {
*status = Status::NotFound(Slice()); // Use an empty error message for speed
*status = Status::NotFound(); // Use an empty error message for speed
}
}
@ -1112,12 +1112,6 @@ class VersionSet::Builder {
MaybeAddFile(v, level, *base_iter);
}
}
// Pre-sort level0 for Get()
if (vset_->options_->compaction_style == kCompactionStyleUniversal) {
std::sort(v->files_[0].begin(), v->files_[0].end(), NewestFirstBySeqNo);
} else {
std::sort(v->files_[0].begin(), v->files_[0].end(), NewestFirst);
}
CheckConsistency(v);
}
@ -1683,6 +1677,12 @@ void VersionSet::MarkFileNumberUsed(uint64_t number) {
void VersionSet::Finalize(Version* v,
std::vector<uint64_t>& size_being_compacted) {
// Pre-sort level0 for Get()
if (options_->compaction_style == kCompactionStyleUniversal) {
std::sort(v->files_[0].begin(), v->files_[0].end(), NewestFirstBySeqNo);
} else {
std::sort(v->files_[0].begin(), v->files_[0].end(), NewestFirst);
}
double max_score = 0;
int max_score_level = 0;

8
db/version_set.h
View File

@ -274,12 +274,14 @@ class VersionSet {
int64_t NumLevelBytes(int level) const;
// Return the last sequence number.
uint64_t LastSequence() const { return last_sequence_; }
uint64_t LastSequence() const {
return last_sequence_.load(std::memory_order_acquire);
}
// Set the last sequence number to s.
void SetLastSequence(uint64_t s) {
assert(s >= last_sequence_);
last_sequence_ = s;
last_sequence_.store(s, std::memory_order_release);
}
// Mark the specified file number as used.
@ -478,7 +480,7 @@ class VersionSet {
const InternalKeyComparator icmp_;
uint64_t next_file_number_;
uint64_t manifest_file_number_;
uint64_t last_sequence_;
std::atomic<uint64_t> last_sequence_;
uint64_t log_number_;
uint64_t prev_log_number_; // 0 or backing store for memtable being compacted

296
include/rocksdb/c.h
View File

@ -54,171 +54,204 @@ extern "C" {
/* Exported types */
typedef struct leveldb_t leveldb_t;
typedef struct leveldb_cache_t leveldb_cache_t;
typedef struct leveldb_comparator_t leveldb_comparator_t;
typedef struct leveldb_env_t leveldb_env_t;
typedef struct leveldb_filelock_t leveldb_filelock_t;
typedef struct leveldb_filterpolicy_t leveldb_filterpolicy_t;
typedef struct leveldb_iterator_t leveldb_iterator_t;
typedef struct leveldb_logger_t leveldb_logger_t;
typedef struct leveldb_options_t leveldb_options_t;
typedef struct leveldb_randomfile_t leveldb_randomfile_t;
typedef struct leveldb_readoptions_t leveldb_readoptions_t;
typedef struct leveldb_seqfile_t leveldb_seqfile_t;
typedef struct leveldb_snapshot_t leveldb_snapshot_t;
typedef struct leveldb_writablefile_t leveldb_writablefile_t;
typedef struct leveldb_writebatch_t leveldb_writebatch_t;
typedef struct leveldb_writeoptions_t leveldb_writeoptions_t;
typedef struct rocksdb_t rocksdb_t;
typedef struct rocksdb_cache_t rocksdb_cache_t;
typedef struct rocksdb_comparator_t rocksdb_comparator_t;
typedef struct rocksdb_env_t rocksdb_env_t;
typedef struct rocksdb_filelock_t rocksdb_filelock_t;
typedef struct rocksdb_filterpolicy_t rocksdb_filterpolicy_t;
typedef struct rocksdb_iterator_t rocksdb_iterator_t;
typedef struct rocksdb_logger_t rocksdb_logger_t;
typedef struct rocksdb_options_t rocksdb_options_t;
typedef struct rocksdb_randomfile_t rocksdb_randomfile_t;
typedef struct rocksdb_readoptions_t rocksdb_readoptions_t;
typedef struct rocksdb_seqfile_t rocksdb_seqfile_t;
typedef struct rocksdb_snapshot_t rocksdb_snapshot_t;
typedef struct rocksdb_writablefile_t rocksdb_writablefile_t;
typedef struct rocksdb_writebatch_t rocksdb_writebatch_t;
typedef struct rocksdb_writeoptions_t rocksdb_writeoptions_t;
typedef struct rocksdb_universal_compaction_options_t rocksdb_universal_compaction_options_t;
/* DB operations */
extern leveldb_t* leveldb_open(
const leveldb_options_t* options,
extern rocksdb_t* rocksdb_open(
const rocksdb_options_t* options,
const char* name,
char** errptr);
extern void leveldb_close(leveldb_t* db);
extern void rocksdb_close(rocksdb_t* db);
extern void leveldb_put(
leveldb_t* db,
const leveldb_writeoptions_t* options,
extern void rocksdb_put(
rocksdb_t* db,
const rocksdb_writeoptions_t* options,
const char* key, size_t keylen,
const char* val, size_t vallen,
char** errptr);
extern void leveldb_delete(
leveldb_t* db,
const leveldb_writeoptions_t* options,
extern void rocksdb_delete(
rocksdb_t* db,
const rocksdb_writeoptions_t* options,
const char* key, size_t keylen,
char** errptr);
extern void leveldb_write(
leveldb_t* db,
const leveldb_writeoptions_t* options,
leveldb_writebatch_t* batch,
extern void rocksdb_write(
rocksdb_t* db,
const rocksdb_writeoptions_t* options,
rocksdb_writebatch_t* batch,
char** errptr);
/* Returns NULL if not found. A malloc()ed array otherwise.
Stores the length of the array in *vallen. */
extern char* leveldb_get(
leveldb_t* db,
const leveldb_readoptions_t* options,
extern char* rocksdb_get(
rocksdb_t* db,
const rocksdb_readoptions_t* options,
const char* key, size_t keylen,
size_t* vallen,
char** errptr);
extern leveldb_iterator_t* leveldb_create_iterator(
leveldb_t* db,
const leveldb_readoptions_t* options);
extern rocksdb_iterator_t* rocksdb_create_iterator(
rocksdb_t* db,
const rocksdb_readoptions_t* options);
extern const leveldb_snapshot_t* leveldb_create_snapshot(
leveldb_t* db);
extern const rocksdb_snapshot_t* rocksdb_create_snapshot(
rocksdb_t* db);
extern void leveldb_release_snapshot(
leveldb_t* db,
const leveldb_snapshot_t* snapshot);
extern void rocksdb_release_snapshot(
rocksdb_t* db,
const rocksdb_snapshot_t* snapshot);
/* Returns NULL if property name is unknown.
Else returns a pointer to a malloc()-ed null-terminated value. */
extern char* leveldb_property_value(
leveldb_t* db,
extern char* rocksdb_property_value(
rocksdb_t* db,
const char* propname);
extern void leveldb_approximate_sizes(
leveldb_t* db,
extern void rocksdb_approximate_sizes(
rocksdb_t* db,
int num_ranges,
const char* const* range_start_key, const size_t* range_start_key_len,
const char* const* range_limit_key, const size_t* range_limit_key_len,
uint64_t* sizes);
extern void leveldb_compact_range(
leveldb_t* db,
extern void rocksdb_compact_range(
rocksdb_t* db,
const char* start_key, size_t start_key_len,
const char* limit_key, size_t limit_key_len);
/* Management operations */
extern void leveldb_destroy_db(
const leveldb_options_t* options,
extern void rocksdb_destroy_db(
const rocksdb_options_t* options,
const char* name,
char** errptr);
extern void leveldb_repair_db(
const leveldb_options_t* options,
extern void rocksdb_repair_db(
const rocksdb_options_t* options,
const char* name,
char** errptr);
/* Iterator */
extern void leveldb_iter_destroy(leveldb_iterator_t*);
extern unsigned char leveldb_iter_valid(const leveldb_iterator_t*);
extern void leveldb_iter_seek_to_first(leveldb_iterator_t*);
extern void leveldb_iter_seek_to_last(leveldb_iterator_t*);
extern void leveldb_iter_seek(leveldb_iterator_t*, const char* k, size_t klen);
extern void leveldb_iter_next(leveldb_iterator_t*);
extern void leveldb_iter_prev(leveldb_iterator_t*);
extern const char* leveldb_iter_key(const leveldb_iterator_t*, size_t* klen);
extern const char* leveldb_iter_value(const leveldb_iterator_t*, size_t* vlen);
extern void leveldb_iter_get_error(const leveldb_iterator_t*, char** errptr);
extern void rocksdb_iter_destroy(rocksdb_iterator_t*);
extern unsigned char rocksdb_iter_valid(const rocksdb_iterator_t*);
extern void rocksdb_iter_seek_to_first(rocksdb_iterator_t*);
extern void rocksdb_iter_seek_to_last(rocksdb_iterator_t*);
extern void rocksdb_iter_seek(rocksdb_iterator_t*, const char* k, size_t klen);
extern void rocksdb_iter_next(rocksdb_iterator_t*);
extern void rocksdb_iter_prev(rocksdb_iterator_t*);
extern const char* rocksdb_iter_key(const rocksdb_iterator_t*, size_t* klen);
extern const char* rocksdb_iter_value(const rocksdb_iterator_t*, size_t* vlen);
extern void rocksdb_iter_get_error(const rocksdb_iterator_t*, char** errptr);
/* Write batch */
extern leveldb_writebatch_t* leveldb_writebatch_create();
extern void leveldb_writebatch_destroy(leveldb_writebatch_t*);
extern void leveldb_writebatch_clear(leveldb_writebatch_t*);
extern void leveldb_writebatch_put(
leveldb_writebatch_t*,
extern rocksdb_writebatch_t* rocksdb_writebatch_create();
extern void rocksdb_writebatch_destroy(rocksdb_writebatch_t*);
extern void rocksdb_writebatch_clear(rocksdb_writebatch_t*);
extern void rocksdb_writebatch_put(
rocksdb_writebatch_t*,
const char* key, size_t klen,
const char* val, size_t vlen);
extern void leveldb_writebatch_delete(
leveldb_writebatch_t*,
extern void rocksdb_writebatch_delete(
rocksdb_writebatch_t*,
const char* key, size_t klen);
extern void leveldb_writebatch_iterate(
leveldb_writebatch_t*,
extern void rocksdb_writebatch_iterate(
rocksdb_writebatch_t*,
void* state,
void (*put)(void*, const char* k, size_t klen, const char* v, size_t vlen),
void (*deleted)(void*, const char* k, size_t klen));
/* Options */
extern leveldb_options_t* leveldb_options_create();
extern void leveldb_options_destroy(leveldb_options_t*);
extern void leveldb_options_set_comparator(
leveldb_options_t*,
leveldb_comparator_t*);
extern void leveldb_options_set_compression_per_level(
leveldb_options_t* opt,
extern rocksdb_options_t* rocksdb_options_create();
extern void rocksdb_options_destroy(rocksdb_options_t*);
extern void rocksdb_options_set_comparator(
rocksdb_options_t*,
rocksdb_comparator_t*);
extern void rocksdb_options_set_compression_per_level(
rocksdb_options_t* opt,
int* level_values,
size_t num_levels);
extern void leveldb_options_set_filter_policy(
leveldb_options_t*,
leveldb_filterpolicy_t*);
extern void leveldb_options_set_create_if_missing(
leveldb_options_t*, unsigned char);
extern void leveldb_options_set_error_if_exists(
leveldb_options_t*, unsigned char);
extern void leveldb_options_set_paranoid_checks(
leveldb_options_t*, unsigned char);
extern void leveldb_options_set_env(leveldb_options_t*, leveldb_env_t*);
extern void leveldb_options_set_info_log(leveldb_options_t*, leveldb_logger_t*);
extern void leveldb_options_set_write_buffer_size(leveldb_options_t*, size_t);
extern void leveldb_options_set_max_open_files(leveldb_options_t*, int);
extern void leveldb_options_set_cache(leveldb_options_t*, leveldb_cache_t*);
extern void leveldb_options_set_block_size(leveldb_options_t*, size_t);
extern void leveldb_options_set_block_restart_interval(leveldb_options_t*, int);
extern void leveldb_options_set_compression_options(
leveldb_options_t* opt, int w_bits, int level, int strategy);
extern void rocksdb_options_set_filter_policy(
rocksdb_options_t*,
rocksdb_filterpolicy_t*);
extern void rocksdb_options_set_create_if_missing(
rocksdb_options_t*, unsigned char);
extern void rocksdb_options_set_error_if_exists(
rocksdb_options_t*, unsigned char);
extern void rocksdb_options_set_paranoid_checks(
rocksdb_options_t*, unsigned char);
extern void rocksdb_options_set_env(rocksdb_options_t*, rocksdb_env_t*);
extern void rocksdb_options_set_info_log(rocksdb_options_t*, rocksdb_logger_t*);
extern void rocksdb_options_set_write_buffer_size(rocksdb_options_t*, size_t);
extern void rocksdb_options_set_max_open_files(rocksdb_options_t*, int);
extern void rocksdb_options_set_cache(rocksdb_options_t*, rocksdb_cache_t*);
extern void rocksdb_options_set_block_size(rocksdb_options_t*, size_t);
extern void rocksdb_options_set_block_restart_interval(rocksdb_options_t*, int);
extern void rocksdb_options_set_compression_options(
rocksdb_options_t*, int, int, int);
extern void rocksdb_options_set_num_levels(rocksdb_options_t*, int);
extern void rocksdb_options_set_level0_file_num_compaction_trigger(
rocksdb_options_t*, int);
extern void rocksdb_options_set_level0_slowdown_writes_trigger(
rocksdb_options_t*, int);
extern void rocksdb_options_set_level0_stop_writes_trigger(
rocksdb_options_t*, int);
extern void rocksdb_options_set_target_file_size_base(
rocksdb_options_t*, uint64_t);
extern void rocksdb_options_set_target_file_size_multiplier(
rocksdb_options_t*, int);
extern void rocksdb_options_set_max_write_buffer_number(rocksdb_options_t*, int);
extern void rocksdb_options_set_min_write_buffer_number_to_merge(rocksdb_options_t*, int);
extern void rocksdb_options_set_max_background_compactions(rocksdb_options_t*, int);
extern void rocksdb_options_set_max_background_flushes(rocksdb_options_t*, int);
extern void rocksdb_options_set_use_fsync(
rocksdb_options_t*, int);
extern void rocksdb_options_set_disable_data_sync(rocksdb_options_t*, int);
extern void rocksdb_options_set_disable_auto_compactions(rocksdb_options_t*, int);
extern void rocksdb_options_set_disable_seek_compaction(rocksdb_options_t*, int);
extern void rocksdb_options_set_source_compaction_factor(rocksdb_options_t*, int);
extern void rocksdb_options_prepare_for_bulk_load(rocksdb_options_t*);
extern void rocksdb_options_set_memtable_vector_rep(rocksdb_options_t*);
enum {
leveldb_no_compression = 0,
leveldb_snappy_compression = 1
rocksdb_no_compression = 0,
rocksdb_snappy_compression = 1,
rocksdb_zlib_compression = 1,
rocksdb_bz2_compression = 1
};
extern void leveldb_options_set_compression(leveldb_options_t*, int);
extern void rocksdb_options_set_compression(rocksdb_options_t*, int);
enum {
rocksdb_level_compaction = 0,
rocksdb_universal_compaction = 1
};
extern void rocksdb_options_set_compaction_style(rocksdb_options_t*, int);
extern void rocksdb_options_set_universal_compaction_options(rocksdb_options_t*, rocksdb_universal_compaction_options_t*);
/* Comparator */
extern leveldb_comparator_t* leveldb_comparator_create(
extern rocksdb_comparator_t* rocksdb_comparator_create(
void* state,
void (*destructor)(void*),
int (*compare)(
@ -226,11 +259,11 @@ extern leveldb_comparator_t* leveldb_comparator_create(
const char* a, size_t alen,
const char* b, size_t blen),
const char* (*name)(void*));
extern void leveldb_comparator_destroy(leveldb_comparator_t*);
extern void rocksdb_comparator_destroy(rocksdb_comparator_t*);
/* Filter policy */
extern leveldb_filterpolicy_t* leveldb_filterpolicy_create(
extern rocksdb_filterpolicy_t* rocksdb_filterpolicy_create(
void* state,
void (*destructor)(void*),
char* (*create_filter)(
@ -243,40 +276,65 @@ extern leveldb_filterpolicy_t* leveldb_filterpolicy_create(
const char* key, size_t length,
const char* filter, size_t filter_length),
const char* (*name)(void*));
extern void leveldb_filterpolicy_destroy(leveldb_filterpolicy_t*);
extern void rocksdb_filterpolicy_destroy(rocksdb_filterpolicy_t*);
extern leveldb_filterpolicy_t* leveldb_filterpolicy_create_bloom(
extern rocksdb_filterpolicy_t* rocksdb_filterpolicy_create_bloom(
int bits_per_key);
/* Read options */
extern leveldb_readoptions_t* leveldb_readoptions_create();
extern void leveldb_readoptions_destroy(leveldb_readoptions_t*);
extern void leveldb_readoptions_set_verify_checksums(
leveldb_readoptions_t*,
extern rocksdb_readoptions_t* rocksdb_readoptions_create();
extern void rocksdb_readoptions_destroy(rocksdb_readoptions_t*);
extern void rocksdb_readoptions_set_verify_checksums(
rocksdb_readoptions_t*,
unsigned char);
extern void leveldb_readoptions_set_fill_cache(
leveldb_readoptions_t*, unsigned char);
extern void leveldb_readoptions_set_snapshot(
leveldb_readoptions_t*,
const leveldb_snapshot_t*);
extern void rocksdb_readoptions_set_fill_cache(
rocksdb_readoptions_t*, unsigned char);
extern void rocksdb_readoptions_set_snapshot(
rocksdb_readoptions_t*,
const rocksdb_snapshot_t*);
/* Write options */
extern leveldb_writeoptions_t* leveldb_writeoptions_create();
extern void leveldb_writeoptions_destroy(leveldb_writeoptions_t*);
extern void leveldb_writeoptions_set_sync(
leveldb_writeoptions_t*, unsigned char);
extern rocksdb_writeoptions_t* rocksdb_writeoptions_create();
extern void rocksdb_writeoptions_destroy(rocksdb_writeoptions_t*);
extern void rocksdb_writeoptions_set_sync(
rocksdb_writeoptions_t*, unsigned char);
extern void rocksdb_writeoptions_disable_WAL(rocksdb_writeoptions_t* opt, int disable);
/* Cache */
extern leveldb_cache_t* leveldb_cache_create_lru(size_t capacity);
extern void leveldb_cache_destroy(leveldb_cache_t* cache);
extern rocksdb_cache_t* rocksdb_cache_create_lru(size_t capacity);
extern void rocksdb_cache_destroy(rocksdb_cache_t* cache);
/* Env */
extern leveldb_env_t* leveldb_create_default_env();
extern void leveldb_env_destroy(leveldb_env_t*);
extern rocksdb_env_t* rocksdb_create_default_env();
extern void rocksdb_env_set_background_threads(rocksdb_env_t* env, int n);
extern void rocksdb_env_destroy(rocksdb_env_t*);
/* Universal Compaction options */
enum {
rocksdb_similar_size_compaction_stop_style = 0,
rocksdb_total_size_compaction_stop_style = 1
};
extern rocksdb_universal_compaction_options_t* rocksdb_universal_compaction_options_create() ;
extern void rocksdb_universal_compaction_options_set_size_ratio(
rocksdb_universal_compaction_options_t*, int);
extern void rocksdb_universal_compaction_options_set_min_merge_width(
rocksdb_universal_compaction_options_t*, int);
extern void rocksdb_universal_compaction_options_set_max_merge_width(
rocksdb_universal_compaction_options_t*, int);
extern void rocksdb_universal_compaction_options_set_max_size_amplification_percent(
rocksdb_universal_compaction_options_t*, int);
extern void rocksdb_universal_compaction_options_set_compression_size_percent(
rocksdb_universal_compaction_options_t*, int);
extern void rocksdb_universal_compaction_options_set_stop_style(
rocksdb_universal_compaction_options_t*, int);
extern void rocksdb_universal_compaction_options_destroy(
rocksdb_universal_compaction_options_t*);
#ifdef __cplusplus
} /* end extern "C" */

4
include/rocksdb/db.h
View File

@ -228,6 +228,10 @@ class DB {
// Number of files in level-0 that would stop writes.
virtual int Level0StopWriteTrigger() = 0;
// Get DB name -- the exact same name that was provided as an argument to
// DB::Open()
virtual const std::string& GetName() const = 0;
// Get Env object from the DB
virtual Env* GetEnv() const = 0;

100
include/rocksdb/statistics.h
View File

@ -111,52 +111,72 @@ enum Tickers {
BLOCK_CACHE_COMPRESSED_MISS, // miss in the compressed block cache
BLOCK_CACHE_COMPRESSED_HIT, // hit in the compressed block cache
WAL_FILE_SYNCED, // Number of times WAL sync is done
WAL_FILE_BYTES, // Number of bytes written to WAL
// Writes can be processed by requesting thread or by the thread at the
// head of the writers queue.
WRITE_DONE_BY_SELF,
WRITE_DONE_BY_OTHER,
WRITE_WITH_WAL, // Number of Write calls that request WAL
COMPACT_READ_BYTES, // Bytes read during compaction
COMPACT_WRITE_BYTES, // Bytes written during compaction
TICKER_ENUM_MAX
};
// The order of items listed in Tickers should be the same as
// the order listed in TickersNameMap
const std::vector<std::pair<Tickers, std::string>> TickersNameMap = {
{ BLOCK_CACHE_MISS, "rocksdb.block.cache.miss" },
{ BLOCK_CACHE_HIT, "rocksdb.block.cache.hit" },
{ BLOCK_CACHE_ADD, "rocksdb.block.cache.add" },
{ BLOCK_CACHE_INDEX_MISS, "rocksdb.block.cache.index.miss" },
{ BLOCK_CACHE_INDEX_HIT, "rocksdb.block.cache.index.hit" },
{ BLOCK_CACHE_FILTER_MISS, "rocksdb.block.cache.filter.miss" },
{ BLOCK_CACHE_FILTER_HIT, "rocksdb.block.cache.filter.hit" },
{ BLOCK_CACHE_DATA_MISS, "rocksdb.block.cache.data.miss" },
{ BLOCK_CACHE_DATA_HIT, "rocksdb.block.cache.data.hit" },
{ BLOOM_FILTER_USEFUL, "rocksdb.bloom.filter.useful" },
{ MEMTABLE_HIT, "rocksdb.memtable.hit" },
{ MEMTABLE_MISS, "rocksdb.memtable.miss" },
{ COMPACTION_KEY_DROP_NEWER_ENTRY, "rocksdb.compaction.key.drop.new" },
{ COMPACTION_KEY_DROP_OBSOLETE, "rocksdb.compaction.key.drop.obsolete" },
{ COMPACTION_KEY_DROP_USER, "rocksdb.compaction.key.drop.user" },
{ NUMBER_KEYS_WRITTEN, "rocksdb.number.keys.written" },
{ NUMBER_KEYS_READ, "rocksdb.number.keys.read" },
{ NUMBER_KEYS_UPDATED, "rocksdb.number.keys.updated" },
{ BYTES_WRITTEN, "rocksdb.bytes.written" },
{ BYTES_READ, "rocksdb.bytes.read" },
{ NO_FILE_CLOSES, "rocksdb.no.file.closes" },
{ NO_FILE_OPENS, "rocksdb.no.file.opens" },
{ NO_FILE_ERRORS, "rocksdb.no.file.errors" },
{ STALL_L0_SLOWDOWN_MICROS, "rocksdb.l0.slowdown.micros" },
{ STALL_MEMTABLE_COMPACTION_MICROS, "rocksdb.memtable.compaction.micros" },
{ STALL_L0_NUM_FILES_MICROS, "rocksdb.l0.num.files.stall.micros" },
{ RATE_LIMIT_DELAY_MILLIS, "rocksdb.rate.limit.delay.millis" },
{ NO_ITERATORS, "rocksdb.num.iterators" },
{ NUMBER_MULTIGET_CALLS, "rocksdb.number.multiget.get" },
{ NUMBER_MULTIGET_KEYS_READ, "rocksdb.number.multiget.keys.read" },
{ NUMBER_MULTIGET_BYTES_READ, "rocksdb.number.multiget.bytes.read" },
{ NUMBER_FILTERED_DELETES, "rocksdb.number.deletes.filtered" },
{ NUMBER_MERGE_FAILURES, "rocksdb.number.merge.failures" },
{ SEQUENCE_NUMBER, "rocksdb.sequence.number" },
{ BLOOM_FILTER_PREFIX_CHECKED, "rocksdb.bloom.filter.prefix.checked" },
{ BLOOM_FILTER_PREFIX_USEFUL, "rocksdb.bloom.filter.prefix.useful" },
{ NUMBER_OF_RESEEKS_IN_ITERATION, "rocksdb.number.reseeks.iteration" },
{ GET_UPDATES_SINCE_CALLS, "rocksdb.getupdatessince.calls" },
{ BLOCK_CACHE_COMPRESSED_MISS, "rocksdb.block.cachecompressed.miss" },
{ BLOCK_CACHE_COMPRESSED_HIT, "rocksdb.block.cachecompressed.hit" },
{ BLOCK_CACHE_MISS, "rocksdb.block.cache.miss" },
{ BLOCK_CACHE_HIT, "rocksdb.block.cache.hit" },
{ BLOCK_CACHE_ADD, "rocksdb.block.cache.add" },
{ BLOCK_CACHE_INDEX_MISS, "rocksdb.block.cache.index.miss" },
{ BLOCK_CACHE_INDEX_HIT, "rocksdb.block.cache.index.hit" },
{ BLOCK_CACHE_FILTER_MISS, "rocksdb.block.cache.filter.miss" },
{ BLOCK_CACHE_FILTER_HIT, "rocksdb.block.cache.filter.hit" },
{ BLOCK_CACHE_DATA_MISS, "rocksdb.block.cache.data.miss" },
{ BLOCK_CACHE_DATA_HIT, "rocksdb.block.cache.data.hit" },
{ BLOOM_FILTER_USEFUL, "rocksdb.bloom.filter.useful" },
{ MEMTABLE_HIT, "rocksdb.memtable.hit" },
{ MEMTABLE_MISS, "rocksdb.memtable.miss" },
{ COMPACTION_KEY_DROP_NEWER_ENTRY, "rocksdb.compaction.key.drop.new" },
{ COMPACTION_KEY_DROP_OBSOLETE, "rocksdb.compaction.key.drop.obsolete" },
{ COMPACTION_KEY_DROP_USER, "rocksdb.compaction.key.drop.user" },
{ NUMBER_KEYS_WRITTEN, "rocksdb.number.keys.written" },
{ NUMBER_KEYS_READ, "rocksdb.number.keys.read" },
{ NUMBER_KEYS_UPDATED, "rocksdb.number.keys.updated" },
{ BYTES_WRITTEN, "rocksdb.bytes.written" },
{ BYTES_READ, "rocksdb.bytes.read" },
{ NO_FILE_CLOSES, "rocksdb.no.file.closes" },
{ NO_FILE_OPENS, "rocksdb.no.file.opens" },
{ NO_FILE_ERRORS, "rocksdb.no.file.errors" },
{ STALL_L0_SLOWDOWN_MICROS, "rocksdb.l0.slowdown.micros" },
{ STALL_MEMTABLE_COMPACTION_MICROS, "rocksdb.memtable.compaction.micros" },
{ STALL_L0_NUM_FILES_MICROS, "rocksdb.l0.num.files.stall.micros" },
{ RATE_LIMIT_DELAY_MILLIS, "rocksdb.rate.limit.delay.millis" },
{ NO_ITERATORS, "rocksdb.num.iterators" },
{ NUMBER_MULTIGET_CALLS, "rocksdb.number.multiget.get" },
{ NUMBER_MULTIGET_KEYS_READ, "rocksdb.number.multiget.keys.read" },
{ NUMBER_MULTIGET_BYTES_READ, "rocksdb.number.multiget.bytes.read" },
{ NUMBER_FILTERED_DELETES, "rocksdb.number.deletes.filtered" },
{ NUMBER_MERGE_FAILURES, "rocksdb.number.merge.failures" },
{ SEQUENCE_NUMBER, "rocksdb.sequence.number" },
{ BLOOM_FILTER_PREFIX_CHECKED, "rocksdb.bloom.filter.prefix.checked" },
{ BLOOM_FILTER_PREFIX_USEFUL, "rocksdb.bloom.filter.prefix.useful" },
{ NUMBER_OF_RESEEKS_IN_ITERATION, "rocksdb.number.reseeks.iteration" },
{ GET_UPDATES_SINCE_CALLS, "rocksdb.getupdatessince.calls" },
{ BLOCK_CACHE_COMPRESSED_MISS, "rocksdb.block.cachecompressed.miss" },
{ BLOCK_CACHE_COMPRESSED_HIT, "rocksdb.block.cachecompressed.hit" },
{ WAL_FILE_SYNCED, "rocksdb.wal.synced" },
{ WAL_FILE_BYTES, "rocksdb.wal.bytes" },
{ WRITE_DONE_BY_SELF, "rocksdb.write.self" },
{ WRITE_DONE_BY_OTHER, "rocksdb.write.other" },
{ WRITE_WITH_WAL, "rocksdb.write.wal" },
{ COMPACT_READ_BYTES, "rocksdb.compact.read.bytes" },
{ COMPACT_WRITE_BYTES, "rocksdb.compact.write.bytes" },
};
/**

31
include/rocksdb/status.h
View File

@ -25,7 +25,7 @@ namespace rocksdb {
class Status {
public:
// Create a success status.
Status() : state_(nullptr) { }
Status() : code_(kOk), state_(nullptr) { }
~Status() { delete[] state_; }
// Copy the specified status.
@ -39,6 +39,10 @@ class Status {
static Status NotFound(const Slice& msg, const Slice& msg2 = Slice()) {
return Status(kNotFound, msg, msg2);
}
// Fast path for not found without malloc;
static Status NotFound() {
return Status(kNotFound);
}
static Status Corruption(const Slice& msg, const Slice& msg2 = Slice()) {
return Status(kCorruption, msg, msg2);
}
@ -59,7 +63,7 @@ class Status {
}
// Returns true iff the status indicates success.
bool ok() const { return (state_ == nullptr); }
bool ok() const { return code() == kOk; }
// Returns true iff the status indicates a NotFound error.
bool IsNotFound() const { return code() == kNotFound; }
@ -87,13 +91,6 @@ class Status {
std::string ToString() const;
private:
// OK status has a nullptr state_. Otherwise, state_ is a new[] array
// of the following form:
// state_[0..3] == length of message
// state_[4] == code
// state_[5..] == message
const char* state_;
enum Code {
kOk = 0,
kNotFound = 1,
@ -105,20 +102,30 @@ class Status {
kIncomplete = 7
};
Code code() const {
return (state_ == nullptr) ? kOk : static_cast<Code>(state_[4]);
}
// A nullptr state_ (which is always the case for OK) means the message
// is empty.
// of the following form:
// state_[0..3] == length of message
// state_[4..] == message
Code code_;
const char* state_;
Code code() const {
return code_;
}
explicit Status(Code code) : code_(code), state_(nullptr) { }
Status(Code code, const Slice& msg, const Slice& msg2);
static const char* CopyState(const char* s);
};
inline Status::Status(const Status& s) {
code_ = s.code_;
state_ = (s.state_ == nullptr) ? nullptr : CopyState(s.state_);
}
inline void Status::operator=(const Status& s) {
// The following condition catches both aliasing (when this == &s),
// and the common case where both s and *this are ok.
code_ = s.code_;
if (state_ != s.state_) {
delete[] state_;
state_ = (s.state_ == nullptr) ? nullptr : CopyState(s.state_);

2
include/rocksdb/transaction_log.h
View File

@ -56,7 +56,7 @@ class LogFile {
};
struct BatchResult {
SequenceNumber sequence = SequenceNumber();
SequenceNumber sequence = 0;
std::unique_ptr<WriteBatch> writeBatchPtr;
};

133
include/utilities/backupable_db.h Normal file
View File

@ -0,0 +1,133 @@
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#pragma once
#include "utilities/stackable_db.h"
#include "rocksdb/env.h"
#include "rocksdb/status.h"
#include <string>
#include <map>
#include <vector>
namespace rocksdb {
struct BackupableDBOptions {
// Where to keep the backup files. Has to be different than dbname_
// Best to set this to dbname_ + "/backups"
// Required
std::string backup_dir;
// Backup Env object. It will be used for backup file I/O. If it's
// nullptr, backups will be written out using DBs Env. If it's
// non-nullptr, backup's I/O will be performed using this object.
// If you want to have backups on HDFS, use HDFS Env here!
// Default: nullptr
Env* backup_env;
// Backup info and error messages will be written to info_log
// if non-nullptr.
// Default: nullptr
Logger* info_log;
// If sync == true, we can guarantee you'll get consistent backup even
// on a machine crash/reboot. Backup process is slower with sync enabled.
// If sync == false, we don't guarantee anything on machine reboot. However,
// chances are some of the backups are consistent.
// Default: true
bool sync;
// If true, it will delete whatever backups there are already
// Default: false
bool destroy_old_data;
explicit BackupableDBOptions(const std::string& _backup_dir,
Env* _backup_env = nullptr,
Logger* _info_log = nullptr,
bool _sync = true,
bool _destroy_old_data = false) :
backup_dir(_backup_dir),
backup_env(_backup_env),
info_log(_info_log),
sync(_sync),
destroy_old_data(_destroy_old_data) { }
};
class BackupEngine;
typedef uint32_t BackupID;
struct BackupInfo {
BackupID backup_id;
int64_t timestamp;
uint64_t size;
BackupInfo() {}
BackupInfo(BackupID _backup_id, int64_t _timestamp, uint64_t _size)
: backup_id(_backup_id), timestamp(_timestamp), size(_size) {}
};
// Stack your DB with BackupableDB to be able to backup the DB
class BackupableDB : public StackableDB {
public:
// BackupableDBOptions have to be the same as the ones used in a previous
// incarnation of the DB
//
// BackupableDB ownes the pointer `DB* db` now. You should not delete it or
// use it after the invocation of BackupableDB
BackupableDB(DB* db, const BackupableDBOptions& options);
virtual ~BackupableDB();
// Captures the state of the database in the latest backup
// NOT a thread safe call
Status CreateNewBackup(bool flush_before_backup = false);
// Returns info about backups in backup_info
void GetBackupInfo(std::vector<BackupInfo>* backup_info);
// deletes old backups, keeping latest num_backups_to_keep alive
Status PurgeOldBackups(uint32_t num_backups_to_keep);
// deletes a specific backup
Status DeleteBackup(BackupID backup_id);
private:
BackupEngine* backup_engine_;
};
// Use this class to access information about backups and restore from them
class RestoreBackupableDB {
public:
RestoreBackupableDB(Env* db_env, const BackupableDBOptions& options);
~RestoreBackupableDB();
// Returns info about backups in backup_info
void GetBackupInfo(std::vector<BackupInfo>* backup_info);
// restore from backup with backup_id
// IMPORTANT -- if you restore from some backup that is not the latest,
// and you start creating new backups from the new DB, all the backups
// that were newer than the backup you restored from will be deleted
//
// Example: Let's say you have backups 1, 2, 3, 4, 5 and you restore 3.
// If you try creating a new backup now, old backups 4 and 5 will be deleted
// and new backup with ID 4 will be created.
Status RestoreDBFromBackup(BackupID backup_id, const std::string& db_dir,
const std::string& wal_dir);
// restore from the latest backup
Status RestoreDBFromLatestBackup(const std::string& db_dir,
const std::string& wal_dir);
// deletes old backups, keeping latest num_backups_to_keep alive
Status PurgeOldBackups(uint32_t num_backups_to_keep);
// deletes a specific backup
Status DeleteBackup(BackupID backup_id);
private:
BackupEngine* backup_engine_;
};
} // rocksdb namespace

4
include/utilities/stackable_db.h
View File

@ -103,6 +103,10 @@ class StackableDB : public DB {
return db_->Level0StopWriteTrigger();
}
virtual const std::string& GetName() const override {
return db_->GetName();
}
virtual Env* GetEnv() const override {
return db_->GetEnv();
}

32
port/stack_trace.cc
View File

@ -31,12 +31,7 @@ static const char* GetExecutableName()
}
}
static void StackTraceHandler(int sig) {
// reset to default handler
signal(sig, SIG_DFL);
fprintf(stderr, "Received signal %d (%s)\n", sig, strsignal(sig));
void PrintStack(int first_frames_to_skip) {
const int kMaxFrames = 100;
void *frames[kMaxFrames];
@ -45,11 +40,8 @@ static void StackTraceHandler(int sig) {
auto executable = GetExecutableName();
const int kSkip = 2; // skip the top two signal handler related frames
for (int i = kSkip; i < num_frames; ++i)
{
fprintf(stderr, "#%-2d %p ", i - kSkip, frames[i]);
for (int i = first_frames_to_skip; i < num_frames; ++i) {
fprintf(stderr, "#%-2d ", i - first_frames_to_skip);
if (symbols) {
fprintf(stderr, "%s ", symbols[i]);
}
@ -57,22 +49,29 @@ static void StackTraceHandler(int sig) {
// out source to addr2line, for the address translation
const int kLineMax = 256;
char cmd[kLineMax];
sprintf(cmd,"addr2line %p -e %s 2>&1", frames[i] , executable);
sprintf(cmd, "addr2line %p -e %s -f -C 2>&1", frames[i], executable);
auto f = popen(cmd, "r");
if (f) {
char line[kLineMax];
while (fgets(line, sizeof(line), f)) {
fprintf(stderr, "%s", line);
line[strlen(line) - 1] = 0; // remove newline
fprintf(stderr, "%s\t", line);
}
pclose(f);
} else {
fprintf(stderr, "\n");
}
} else {
fprintf(stderr, "\n");
fprintf(stderr, " %p", frames[i]);
}
fprintf(stderr, "\n");
}
}
static void StackTraceHandler(int sig) {
// reset to default handler
signal(sig, SIG_DFL);
fprintf(stderr, "Received signal %d (%s)\n", sig, strsignal(sig));
// skip the top three signal handler related frames
PrintStack(3);
// re-signal to default handler (so we still get core dump if needed...)
raise(sig);
}
@ -96,6 +95,7 @@ void InstallStackTraceHandler() {
namespace rocksdb {
void InstallStackTraceHandler() {}
void PrintStack(int first_frames_to_skip) {}
}

329
util/autovector.h Normal file
View File

@ -0,0 +1,329 @@
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#pragma once
#include <algorithm>
#include <cassert>
#include <stdexcept>
#include <iterator>
#include <vector>
namespace rocksdb {
// A vector that leverages pre-allocated stack-based array to achieve better
// performance for array with small amount of items.
//
// The interface resembles that of vector, but with less features since we aim
// to solve the problem that we have in hand, rather than implementing a
// full-fledged generic container.
//
// Currently we don't support:
// * reserve()/shrink_to_fit()/resize()
// If used correctly, in most cases, people should not touch the
// underlying vector at all.
// * random insert()/erase(), please only use push_back()/pop_back().
// * No move/swap operations. Each autovector instance has a
// stack-allocated array and if we want support move/swap operations, we
// need to copy the arrays other than just swapping the pointers. In this
// case we'll just explicitly forbid these operations since they may
// lead users to make false assumption by thinking they are inexpensive
// operations.
//
// Naming style of public methods almost follows that of the STL's.
template <class T, size_t kSize = 8>
class autovector {
public:
// General STL-style container member types.
typedef T value_type;
typedef typename std::vector<T>::difference_type difference_type;
typedef typename std::vector<T>::size_type size_type;
typedef value_type& reference;
typedef const value_type& const_reference;
typedef value_type* pointer;
typedef const value_type* const_pointer;
// This class is the base for regular/const iterator
template <class TAutoVector, class TValueType>
class iterator_impl {
public:
// -- iterator traits
typedef iterator_impl<TAutoVector, TValueType> self_type;
typedef TValueType value_type;
typedef TValueType& reference;
typedef TValueType* pointer;
typedef typename TAutoVector::difference_type difference_type;
typedef std::random_access_iterator_tag iterator_category;
iterator_impl(TAutoVector* vect, size_t index)
: vect_(vect)
, index_(index) {
};
iterator_impl(const iterator_impl&) = default;
~iterator_impl() { }
iterator_impl& operator=(const iterator_impl&) = default;
// -- Advancement
// iterator++
self_type& operator++() {
++index_;
return *this;
}
// ++iterator
self_type operator++(int) {
auto old = *this;
++index_;
return old;
}
// iterator--
self_type& operator--() {
--index_;
return *this;
}
// --iterator
self_type operator--(int) {
auto old = *this;
--index_;
return old;
}
self_type operator-(difference_type len) {
return self_type(vect_, index_ - len);
}
difference_type operator-(const self_type& other) {
assert(vect_ == other.vect_);
return index_ - other.index_;
}
self_type operator+(difference_type len) {
return self_type(vect_, index_ + len);
}
self_type& operator+=(difference_type len) {
index_ += len;
return *this;
}
self_type& operator-=(difference_type len) {
index_ -= len;
return *this;
}
// -- Reference
reference operator*() {
assert(vect_->size() >= index_);
return (*vect_)[index_];
}
pointer operator->() {
assert(vect_->size() >= index_);
return &(*vect_)[index_];
}
// -- Logical Operators
bool operator==(const self_type& other) const {
assert(vect_ == other.vect_);
return index_ == other.index_;
}
bool operator!=(const self_type& other) const {
return !(*this == other);
}
bool operator>(const self_type& other) const {
assert(vect_ == other.vect_);
return index_ > other.index_;
}
bool operator<(const self_type& other) const {
assert(vect_ == other.vect_);
return index_ < other.index_;
}
bool operator>=(const self_type& other) const {
assert(vect_ == other.vect_);
return index_ >= other.index_;
}
bool operator<=(const self_type& other) const {
assert(vect_ == other.vect_);
return index_ <= other.index_;
}
private:
TAutoVector* vect_ = nullptr;
size_t index_ = 0;
};
typedef iterator_impl<autovector, value_type> iterator;
typedef iterator_impl<const autovector, const value_type> const_iterator;
typedef std::reverse_iterator<iterator> reverse_iterator;
typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
autovector() = default;
~autovector() = default;
// -- Immutable operations
// Indicate if all data resides in in-stack data structure.
bool only_in_stack() const {
// If no element was inserted at all, the vector's capacity will be `0`.
return vect_.capacity() == 0;
}
size_type size() const {
return num_stack_items_ + vect_.size();
}
bool empty() const {
return size() == 0;
}
// will not check boundry
const_reference operator[](size_type n) const {
return n < kSize ? values_[n] : vect_[n - kSize];
}
reference operator[](size_type n) {
return n < kSize ? values_[n] : vect_[n - kSize];
}
// will check boundry
const_reference at(size_type n) const {
if (n >= size()) {
throw std::out_of_range("autovector: index out of range");
}
return (*this)[n];
}
reference at(size_type n) {
if (n >= size()) {
throw std::out_of_range("autovector: index out of range");
}
return (*this)[n];
}
reference front() {
assert(!empty());
return *begin();
}
const_reference front() const {
assert(!empty());
return *begin();
}
reference back() {
assert(!empty());
return *(end() - 1);
}
const_reference back() const {
assert(!empty());
return *(end() - 1);
}
// -- Mutable Operations
void push_back(T&& item) {
if (num_stack_items_ < kSize) {
values_[num_stack_items_++] = std::move(item);
} else {
vect_.push_back(item);
}
}
void push_back(const T& item) {
push_back(value_type(item));
}
template<class... Args>
void emplace_back(Args&&... args) {
push_back(value_type(args...));
}
void pop_back() {
assert(!empty());
if (!vect_.empty()) {
vect_.pop_back();
} else {
--num_stack_items_;
}
}
void clear() {
num_stack_items_ = 0;
vect_.clear();
}
// -- Copy and Assignment
autovector& assign(const autovector& other);
autovector(const autovector& other) {
assign(other);
}
autovector& operator=(const autovector& other) {
return assign(other);
}
// move operation are disallowed since it is very hard to make sure both
// autovectors are allocated from the same function stack.
autovector& operator=(autovector&& other) = delete;
autovector(autovector&& other) = delete;
// -- Iterator Operations
iterator begin() {
return iterator(this, 0);
}
const_iterator begin() const {
return const_iterator(this, 0);
}
iterator end() {
return iterator(this, this->size());
}
const_iterator end() const {
return const_iterator(this, this->size());
}
reverse_iterator rbegin() {
return reverse_iterator(end());
}
const_reverse_iterator rbegin() const {
return const_reverse_iterator(end());
}
reverse_iterator rend() {
return reverse_iterator(begin());
}
const_reverse_iterator rend() const {
return const_reverse_iterator(begin());
}
private:
size_type num_stack_items_ = 0; // current number of items
value_type values_[kSize]; // the first `kSize` items
// used only if there are more than `kSize` items.
std::vector<T> vect_;
};
template <class T, size_t kSize>
autovector<T, kSize>& autovector<T, kSize>::assign(const autovector& other) {
// copy the internal vector
vect_.assign(other.vect_.begin(), other.vect_.end());
// copy array
num_stack_items_ = other.num_stack_items_;
std::copy(other.values_, other.values_ + num_stack_items_, values_);
return *this;
}
} // rocksdb

290
util/autovector_test.cc Normal file
View File

@ -0,0 +1,290 @@
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#include <atomic>
#include <iostream>
#include "rocksdb/env.h"
#include "util/autovector.h"
#include "util/testharness.h"
#include "util/testutil.h"
namespace rocksdb {
using namespace std;
class AutoVectorTest { };
const size_t kSize = 8;
TEST(AutoVectorTest, PushBackAndPopBack) {
autovector<size_t, kSize> vec;
ASSERT_TRUE(vec.empty());
ASSERT_EQ(0ul, vec.size());
for (size_t i = 0; i < 1000 * kSize; ++i) {
vec.push_back(i);
ASSERT_TRUE(!vec.empty());
if (i < kSize) {
ASSERT_TRUE(vec.only_in_stack());
} else {
ASSERT_TRUE(!vec.only_in_stack());
}
ASSERT_EQ(i + 1, vec.size());
ASSERT_EQ(i, vec[i]);
ASSERT_EQ(i, vec.at(i));
}
size_t size = vec.size();
while (size != 0) {
vec.pop_back();
// will always be in heap
ASSERT_TRUE(!vec.only_in_stack());
ASSERT_EQ(--size, vec.size());
}
ASSERT_TRUE(vec.empty());
}
TEST(AutoVectorTest, EmplaceBack) {
typedef std::pair<size_t, std::string> ValueType;
autovector<ValueType, kSize> vec;
for (size_t i = 0; i < 1000 * kSize; ++i) {
vec.emplace_back(i, std::to_string(i + 123));
ASSERT_TRUE(!vec.empty());
if (i < kSize) {
ASSERT_TRUE(vec.only_in_stack());
} else {
ASSERT_TRUE(!vec.only_in_stack());
}
ASSERT_EQ(i + 1, vec.size());
ASSERT_EQ(i, vec[i].first);
ASSERT_EQ(std::to_string(i + 123), vec[i].second);
}
vec.clear();
ASSERT_TRUE(vec.empty());
ASSERT_TRUE(!vec.only_in_stack());
}
void AssertEqual(
const autovector<size_t, kSize>& a, const autovector<size_t, kSize>& b) {
ASSERT_EQ(a.size(), b.size());
ASSERT_EQ(a.empty(), b.empty());
ASSERT_EQ(a.only_in_stack(), b.only_in_stack());
for (size_t i = 0; i < a.size(); ++i) {
ASSERT_EQ(a[i], b[i]);
}
}
TEST(AutoVectorTest, CopyAndAssignment) {
// Test both heap-allocated and stack-allocated cases.
for (auto size : { kSize / 2, kSize * 1000 }) {
autovector<size_t, kSize> vec;
for (size_t i = 0; i < size; ++i) {
vec.push_back(i);
}
{
autovector<size_t, kSize> other;
other = vec;
AssertEqual(other, vec);
}
{
autovector<size_t, kSize> other(vec);
AssertEqual(other, vec);
}
}
}
TEST(AutoVectorTest, Iterators) {
autovector<std::string, kSize> vec;
for (size_t i = 0; i < kSize * 1000; ++i) {
vec.push_back(std::to_string(i));
}
// basic operator test
ASSERT_EQ(vec.front(), *vec.begin());
ASSERT_EQ(vec.back(), *(vec.end() - 1));
ASSERT_TRUE(vec.begin() < vec.end());
// non-const iterator
size_t index = 0;
for (const auto& item : vec) {
ASSERT_EQ(vec[index++], item);
}
index = vec.size() - 1;
for (auto pos = vec.rbegin(); pos != vec.rend(); ++pos) {
ASSERT_EQ(vec[index--], *pos);
}
// const iterator
const auto& cvec = vec;
index = 0;
for (const auto& item : cvec) {
ASSERT_EQ(cvec[index++], item);
}
index = vec.size() - 1;
for (auto pos = cvec.rbegin(); pos != cvec.rend(); ++pos) {
ASSERT_EQ(cvec[index--], *pos);
}
// forward and backward
auto pos = vec.begin();
while (pos != vec.end()) {
auto old_val = *pos;
auto old = pos++;
// HACK: make sure -> works
ASSERT_TRUE(!old->empty());
ASSERT_EQ(old_val, *old);
ASSERT_TRUE(pos == vec.end() || old_val != *pos);
}
pos = vec.begin();
for (size_t i = 0; i < vec.size(); i += 2) {
// Cannot use ASSERT_EQ since that macro depends on iostream serialization
ASSERT_TRUE(pos + 2 - 2 == pos);
pos += 2;
ASSERT_TRUE(pos >= vec.begin());
ASSERT_TRUE(pos <= vec.end());
size_t diff = static_cast<size_t>(pos - vec.begin());
ASSERT_EQ(i + 2, diff);
}
}
vector<string> GetTestKeys(size_t size) {
vector<string> keys;
keys.resize(size);
int index = 0;
for (auto& key : keys) {
key = "item-" + to_string(index++);
}
return keys;
}
template<class TVector>
void BenchmarkVectorCreationAndInsertion(
string name, size_t ops, size_t item_size,
const std::vector<typename TVector::value_type>& items) {
auto env = Env::Default();
int index = 0;
auto start_time = env->NowNanos();
auto ops_remaining = ops;
while(ops_remaining--) {
TVector v;
for (size_t i = 0; i < item_size; ++i) {
v.push_back(items[index++]);
}
}
auto elapsed = env->NowNanos() - start_time;
cout << "created " << ops << " " << name << " instances:\n\t"
<< "each was inserted with " << item_size << " elements\n\t"
<< "total time elapsed: " << elapsed << " (ns)" << endl;
}
template <class TVector>
size_t BenchmarkSequenceAccess(string name, size_t ops, size_t elem_size) {
TVector v;
for (const auto& item : GetTestKeys(elem_size)) {
v.push_back(item);
}
auto env = Env::Default();
auto ops_remaining = ops;
auto start_time = env->NowNanos();
size_t total = 0;
while (ops_remaining--) {
auto end = v.end();
for (auto pos = v.begin(); pos != end; ++pos) {
total += pos->size();
}
}
auto elapsed = env->NowNanos() - start_time;
cout << "performed " << ops << " sequence access against " << name << "\n\t"
<< "size: " << elem_size << "\n\t"
<< "total time elapsed: " << elapsed << " (ns)" << endl;
// HACK avoid compiler's optimization to ignore total
return total;
}
// This test case only reports the performance between std::vector<string>
// and autovector<string>. We chose string for comparison because in most
// o our use cases we used std::vector<string>.
TEST(AutoVectorTest, PerfBench) {
// We run same operations for kOps times in order to get a more fair result.
size_t kOps = 100000;
// Creation and insertion test
// Test the case when there is:
// * no element inserted: internal array of std::vector may not really get
// initialize.
// * one element inserted: internal array of std::vector must have
// initialized.
// * kSize elements inserted. This shows the most time we'll spend if we
// keep everything in stack.
// * 2 * kSize elements inserted. The internal vector of
// autovector must have been initialized.
cout << "=====================================================" << endl;
cout << "Creation and Insertion Test (value type: std::string)" << endl;
cout << "=====================================================" << endl;
// pre-generated unique keys
auto string_keys = GetTestKeys(kOps * 2 * kSize);
for (auto insertions : { 0ul, 1ul, kSize / 2, kSize, 2 * kSize }) {
BenchmarkVectorCreationAndInsertion<vector<string>>(
"vector<string>", kOps, insertions, string_keys
);
BenchmarkVectorCreationAndInsertion<autovector<string, kSize>>(
"autovector<string>", kOps, insertions, string_keys
);
cout << "-----------------------------------" << endl;
}
cout << "=====================================================" << endl;
cout << "Creation and Insertion Test (value type: uint64_t)" << endl;
cout << "=====================================================" << endl;
// pre-generated unique keys
vector<uint64_t> int_keys(kOps * 2 * kSize);
for (size_t i = 0; i < kOps * 2 * kSize; ++i) {
int_keys[i] = i;
}
for (auto insertions : { 0ul, 1ul, kSize / 2, kSize, 2 * kSize }) {
BenchmarkVectorCreationAndInsertion<vector<uint64_t>>(
"vector<uint64_t>", kOps, insertions, int_keys
);
BenchmarkVectorCreationAndInsertion<autovector<uint64_t, kSize>>(
"autovector<uint64_t>", kOps, insertions, int_keys
);
cout << "-----------------------------------" << endl;
}
// Sequence Access Test
cout << "=====================================================" << endl;
cout << "Sequence Access Test" << endl;
cout << "=====================================================" << endl;
for (auto elem_size : { kSize / 2, kSize, 2 * kSize }) {
BenchmarkSequenceAccess<vector<string>>(
"vector", kOps, elem_size
);
BenchmarkSequenceAccess<autovector<string, kSize>>(
"autovector", kOps, elem_size
);
cout << "-----------------------------------" << endl;
}
}
} // namespace rocksdb
int main(int argc, char** argv) {
return rocksdb::test::RunAllTests();
}

24
util/cache.cc
View File

@ -10,7 +10,7 @@
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <list>
#include <vector>
#include "rocksdb/cache.h"
#include "port/port.h"
@ -111,8 +111,8 @@ class HandleTable {
}
void Resize() {
uint32_t new_length = 4;
while (new_length < elems_) {
uint32_t new_length = 16;
while (new_length < elems_ * 1.5) {
new_length *= 2;
}
LRUHandle** new_list = new LRUHandle*[new_length];
@ -264,18 +264,20 @@ Cache::Handle* LRUCache::Insert(
LRUHandle* e = reinterpret_cast<LRUHandle*>(
malloc(sizeof(LRUHandle)-1 + key.size()));
std::list<LRUHandle*> last_reference_list;
std::vector<LRUHandle*> last_reference_list;
last_reference_list.reserve(1);
e->value = value;
e->deleter = deleter;
e->charge = charge;
e->key_length = key.size();
e->hash = hash;
e->refs = 2; // One from LRUCache, one for the returned handle
memcpy(e->key_data, key.data(), key.size());
{
MutexLock l(&mutex_);
e->value = value;
e->deleter = deleter;
e->charge = charge;
e->key_length = key.size();
e->hash = hash;
e->refs = 2; // One from LRUCache, one for the returned handle
memcpy(e->key_data, key.data(), key.size());
LRU_Append(e);
LRUHandle* old = table_.Insert(e);

11
util/coding.cc
View File

@ -217,6 +217,17 @@ Slice GetLengthPrefixedSlice(const char* data) {
return Slice(p, len);
}
Slice GetSliceUntil(Slice* slice, char delimiter) {
uint32_t len;
for (len = 0; len < slice->size() && slice->data()[len] != delimiter; ++len) {
// nothing
}
Slice ret(slice->data(), len);
slice->remove_prefix(len + ((len < slice->size()) ? 1 : 0));
return ret;
}
void BitStreamPutInt(char* dst, size_t dstlen, size_t offset,
uint32_t bits, uint64_t value) {
assert((offset + bits + 7)/8 <= dstlen);

2
util/coding.h
View File

@ -40,6 +40,8 @@ extern bool GetVarint64(Slice* input, uint64_t* value);
extern bool GetLengthPrefixedSlice(Slice* input, Slice* result);
extern Slice GetLengthPrefixedSlice(const char* data);
extern Slice GetSliceUntil(Slice* slice, char delimiter);
// Pointer-based variants of GetVarint... These either store a value
// in *v and return a pointer just past the parsed value, or return
// nullptr on error. These routines only look at bytes in the range

10
util/env_posix.cc
View File

@ -395,7 +395,7 @@ class PosixMmapFile : public WritableFile {
}
Status MapNewRegion() {
#ifdef OS_LINUX
#ifdef ROCKSDB_FALLOCATE_PRESENT
assert(base_ == nullptr);
TEST_KILL_RANDOM(rocksdb_kill_odds);
@ -581,7 +581,7 @@ class PosixMmapFile : public WritableFile {
#endif
}
#ifdef OS_LINUX
#ifdef ROCKSDB_FALLOCATE_PRESENT
virtual Status Allocate(off_t offset, off_t len) {
TEST_KILL_RANDOM(rocksdb_kill_odds);
if (!fallocate(fd_, FALLOC_FL_KEEP_SIZE, offset, len)) {
@ -758,7 +758,7 @@ class PosixWritableFile : public WritableFile {
#endif
}
#ifdef OS_LINUX
#ifdef ROCKSDB_FALLOCATE_PRESENT
virtual Status Allocate(off_t offset, off_t len) {
TEST_KILL_RANDOM(rocksdb_kill_odds);
if (!fallocate(fd_, FALLOC_FL_KEEP_SIZE, offset, len)) {
@ -862,7 +862,7 @@ class PosixRandomRWFile : public RandomRWFile {
return Status::OK();
}
#ifdef OS_LINUX
#ifdef ROCKSDB_FALLOCATE_PRESENT
virtual Status Allocate(off_t offset, off_t len) {
if (!fallocate(fd_, FALLOC_FL_KEEP_SIZE, offset, len)) {
return Status::OK();
@ -1303,7 +1303,7 @@ class PosixEnv : public Env {
}
bool SupportsFastAllocate(const std::string& path) {
#ifdef OS_LINUX
#ifdef ROCKSDB_FALLOCATE_PRESENT
struct statfs s;
if (statfs(path.c_str(), &s)){
return false;

12
util/posix_logger.h
View File

@ -36,15 +36,19 @@ class PosixLogger : public Logger {
const static uint64_t flush_every_seconds_ = 5;
std::atomic_uint_fast64_t last_flush_micros_;
Env* env_;
bool flush_pending_;
public:
PosixLogger(FILE* f, uint64_t (*gettid)(), Env* env) :
file_(f), gettid_(gettid), log_size_(0), fd_(fileno(f)),
last_flush_micros_(0), env_(env) { }
last_flush_micros_(0), env_(env), flush_pending_(false) { }
virtual ~PosixLogger() {
fclose(file_);
}
virtual void Flush() {
fflush(file_);
if (flush_pending_) {
flush_pending_ = false;
fflush(file_);
}
last_flush_micros_ = env_->NowMicros();
}
virtual void Logv(const char* format, va_list ap) {
@ -107,7 +111,7 @@ class PosixLogger : public Logger {
assert(p <= limit);
const size_t write_size = p - base;
#ifdef OS_LINUX
#ifdef ROCKSDB_FALLOCATE_PRESENT
// If this write would cross a boundary of kDebugLogChunkSize
// space, pre-allocate more space to avoid overly large
// allocations from filesystem allocsize options.
@ -124,6 +128,7 @@ class PosixLogger : public Logger {
#endif
size_t sz = fwrite(base, 1, write_size, file_);
flush_pending_ = true;
assert(sz == write_size);
if (sz > 0) {
log_size_ += write_size;
@ -131,6 +136,7 @@ class PosixLogger : public Logger {
uint64_t now_micros = static_cast<uint64_t>(now_tv.tv_sec) * 1000000 +
now_tv.tv_usec;
if (now_micros - last_flush_micros_ >= flush_every_seconds_ * 1000000) {
flush_pending_ = false;
fflush(file_);
last_flush_micros_ = now_micros;
}

3
util/stack_trace.h
View File

@ -11,4 +11,7 @@ namespace rocksdb {
// Currently supports linux only. No-op otherwise.
void InstallStackTraceHandler();
// Prints stack, skips skip_first_frames frames
void PrintStack(int first_frames_to_skip = 0);
} // namespace rocksdb

87
util/status.cc
View File

@ -16,68 +16,65 @@ namespace rocksdb {
const char* Status::CopyState(const char* state) {
uint32_t size;
memcpy(&size, state, sizeof(size));
char* result = new char[size + 5];
memcpy(result, state, size + 5);
char* result = new char[size + 4];
memcpy(result, state, size + 4);
return result;
}
Status::Status(Code code, const Slice& msg, const Slice& msg2) {
Status::Status(Code code, const Slice& msg, const Slice& msg2) :
code_(code) {
assert(code != kOk);
const uint32_t len1 = msg.size();
const uint32_t len2 = msg2.size();
const uint32_t size = len1 + (len2 ? (2 + len2) : 0);
char* result = new char[size + 5];
char* result = new char[size + 4];
memcpy(result, &size, sizeof(size));
result[4] = static_cast<char>(code);
memcpy(result + 5, msg.data(), len1);
memcpy(result + 4, msg.data(), len1);
if (len2) {
result[5 + len1] = ':';
result[6 + len1] = ' ';
memcpy(result + 7 + len1, msg2.data(), len2);
result[4 + len1] = ':';
result[5 + len1] = ' ';
memcpy(result + 6 + len1, msg2.data(), len2);
}
state_ = result;
}
std::string Status::ToString() const {
if (state_ == nullptr) {
return "OK";
} else {
char tmp[30];
const char* type;
switch (code()) {
case kOk:
type = "OK";
break;
case kNotFound:
type = "NotFound: ";
break;
case kCorruption:
type = "Corruption: ";
break;
case kNotSupported:
type = "Not implemented: ";
break;
case kInvalidArgument:
type = "Invalid argument: ";
break;
case kIOError:
type = "IO error: ";
break;
case kMergeInProgress:
type = "Merge In Progress: ";
break;
default:
snprintf(tmp, sizeof(tmp), "Unknown code(%d): ",
static_cast<int>(code()));
type = tmp;
break;
}
std::string result(type);
char tmp[30];
const char* type;
switch (code_) {
case kOk:
return "OK";
case kNotFound:
type = "NotFound: ";
break;
case kCorruption:
type = "Corruption: ";
break;
case kNotSupported:
type = "Not implemented: ";
break;
case kInvalidArgument:
type = "Invalid argument: ";
break;
case kIOError:
type = "IO error: ";
break;
case kMergeInProgress:
type = "Merge In Progress: ";
break;
default:
snprintf(tmp, sizeof(tmp), "Unknown code(%d): ",
static_cast<int>(code()));
type = tmp;
break;
}
std::string result(type);
if (state_ != nullptr) {
uint32_t length;
memcpy(&length, state_, sizeof(length));
result.append(state_ + 5, length);
return result;
result.append(state_ + 4, length);
}
return result;
}
} // namespace rocksdb

2
util/testharness.h
View File

@ -15,6 +15,7 @@
#include "rocksdb/env.h"
#include "rocksdb/slice.h"
#include "util/random.h"
#include "util/stack_trace.h"
namespace rocksdb {
namespace test {
@ -58,6 +59,7 @@ class Tester {
~Tester() {
if (!ok_) {
fprintf(stderr, "%s:%d:%s\n", fname_, line_, ss_.str().c_str());
PrintStack(2);
exit(1);
}
}

BIN
utilities/.DS_Store vendored
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Binary file not shown.

874
utilities/backupable/backupable_db.cc Normal file
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@ -0,0 +1,874 @@
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include "utilities/backupable_db.h"
#include "db/filename.h"
#include "util/coding.h"
#include "rocksdb/transaction_log.h"
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
#include <algorithm>
#include <vector>
#include <map>
#include <string>
#include <limits>
namespace rocksdb {
// -------- BackupEngine class ---------
class BackupEngine {
public:
BackupEngine(Env* db_env, const BackupableDBOptions& options);
~BackupEngine();
Status CreateNewBackup(DB* db, bool flush_before_backup = false);
Status PurgeOldBackups(uint32_t num_backups_to_keep);
Status DeleteBackup(BackupID backup_id);
void GetBackupInfo(std::vector<BackupInfo>* backup_info);
Status RestoreDBFromBackup(BackupID backup_id, const std::string &db_dir,
const std::string &wal_dir);
Status RestoreDBFromLatestBackup(const std::string &db_dir,
const std::string &wal_dir) {
return RestoreDBFromBackup(latest_backup_id_, db_dir, wal_dir);
}
void DeleteBackupsNewerThan(uint64_t sequence_number);
private:
class BackupMeta {
public:
BackupMeta(const std::string& meta_filename,
std::unordered_map<std::string, int>* file_refs, Env* env)
: timestamp_(0), size_(0), meta_filename_(meta_filename),
file_refs_(file_refs), env_(env) {}
~BackupMeta() {}
void RecordTimestamp() {
env_->GetCurrentTime(&timestamp_);
}
int64_t GetTimestamp() const {
return timestamp_;
}
uint64_t GetSize() const {
return size_;
}
void SetSequenceNumber(uint64_t sequence_number) {
sequence_number_ = sequence_number;
}
uint64_t GetSequenceNumber() {
return sequence_number_;
}
void AddFile(const std::string& filename, uint64_t size);
void Delete();
bool Empty() {
return files_.empty();
}
const std::vector<std::string>& GetFiles() {
return files_;
}
Status LoadFromFile(const std::string& backup_dir);
Status StoreToFile(bool sync);
private:
int64_t timestamp_;
// sequence number is only approximate, should not be used
// by clients
uint64_t sequence_number_;
uint64_t size_;
std::string const meta_filename_;
// files with relative paths (without "/" prefix!!)
std::vector<std::string> files_;
std::unordered_map<std::string, int>* file_refs_;
Env* env_;
static const size_t max_backup_meta_file_size_ = 10 * 1024 * 1024; // 10MB
}; // BackupMeta
inline std::string GetAbsolutePath(
const std::string &relative_path = "") const {
assert(relative_path.size() == 0 || relative_path[0] != '/');
return options_.backup_dir + "/" + relative_path;
}
inline std::string GetPrivateDirRel() const {
return "private";
}
inline std::string GetPrivateFileRel(BackupID backup_id,
const std::string &file = "") const {
assert(file.size() == 0 || file[0] != '/');
return GetPrivateDirRel() + "/" + std::to_string(backup_id) + "/" + file;
}
inline std::string GetSharedFileRel(const std::string& file = "") const {
assert(file.size() == 0 || file[0] != '/');
return "shared/" + file;
}
inline std::string GetLatestBackupFile(bool tmp = false) const {
return GetAbsolutePath(std::string("LATEST_BACKUP") + (tmp ? ".tmp" : ""));
}
inline std::string GetBackupMetaDir() const {
return GetAbsolutePath("meta");
}
inline std::string GetBackupMetaFile(BackupID backup_id) const {
return GetBackupMetaDir() + "/" + std::to_string(backup_id);
}
Status GetLatestBackupFileContents(uint32_t* latest_backup);
Status PutLatestBackupFileContents(uint32_t latest_backup);
// if size_limit == 0, there is no size limit, copy everything
Status CopyFile(const std::string& src,
const std::string& dst,
Env* src_env,
Env* dst_env,
bool sync,
uint64_t* size = nullptr,
uint64_t size_limit = 0);
// if size_limit == 0, there is no size limit, copy everything
Status BackupFile(BackupID backup_id,
BackupMeta* backup,
bool shared,
const std::string& src_dir,
const std::string& src_fname, // starts with "/"
uint64_t size_limit = 0);
// Will delete all the files we don't need anymore
// If full_scan == true, it will do the full scan of files/ directory
// and delete all the files that are not referenced from backuped_file_refs_
void GarbageCollection(bool full_scan);
// backup state data
BackupID latest_backup_id_;
std::map<BackupID, BackupMeta> backups_;
std::unordered_map<std::string, int> backuped_file_refs_;
std::vector<BackupID> obsolete_backups_;
// options data
BackupableDBOptions options_;
Env* db_env_;
Env* backup_env_;
static const size_t copy_file_buffer_size_ = 5 * 1024 * 1024LL; // 5MB
};
BackupEngine::BackupEngine(Env* db_env, const BackupableDBOptions& options)
: options_(options),
db_env_(db_env),
backup_env_(options.backup_env != nullptr ? options.backup_env : db_env_) {
// create all the dirs we need
backup_env_->CreateDirIfMissing(GetAbsolutePath());
backup_env_->CreateDirIfMissing(GetAbsolutePath(GetSharedFileRel()));
backup_env_->CreateDirIfMissing(GetAbsolutePath(GetPrivateDirRel()));
backup_env_->CreateDirIfMissing(GetBackupMetaDir());
std::vector<std::string> backup_meta_files;
backup_env_->GetChildren(GetBackupMetaDir(), &backup_meta_files);
// create backups_ structure
for (auto& file : backup_meta_files) {
BackupID backup_id = 0;
sscanf(file.c_str(), "%u", &backup_id);
if (backup_id == 0 || file != std::to_string(backup_id)) {
// invalid file name, delete that
backup_env_->DeleteFile(GetBackupMetaDir() + "/" + file);
continue;
}
assert(backups_.find(backup_id) == backups_.end());
backups_.insert(std::make_pair(
backup_id, BackupMeta(GetBackupMetaFile(backup_id),
&backuped_file_refs_, backup_env_)));
}
if (options_.destroy_old_data) { // Destory old data
for (auto& backup : backups_) {
backup.second.Delete();
obsolete_backups_.push_back(backup.first);
}
backups_.clear();
// start from beginning
latest_backup_id_ = 0;
// GarbageCollection() will do the actual deletion
} else { // Load data from storage
// load the backups if any
for (auto& backup : backups_) {
Status s = backup.second.LoadFromFile(options_.backup_dir);
if (!s.ok()) {
Log(options_.info_log, "Backup %u corrupted - deleting -- %s",
backup.first, s.ToString().c_str());
backup.second.Delete();
obsolete_backups_.push_back(backup.first);
}
}
// delete obsolete backups from the structure
for (auto ob : obsolete_backups_) {
backups_.erase(ob);
}
Status s = GetLatestBackupFileContents(&latest_backup_id_);
// If latest backup file is corrupted or non-existent
// set latest backup as the biggest backup we have
// or 0 if we have no backups
if (!s.ok() ||
backups_.find(latest_backup_id_) == backups_.end()) {
auto itr = backups_.end();
latest_backup_id_ = (itr == backups_.begin()) ? 0 : (--itr)->first;
}
}
// delete any backups that claim to be later than latest
for (auto itr = backups_.upper_bound(latest_backup_id_);
itr != backups_.end();) {
itr->second.Delete();
obsolete_backups_.push_back(itr->first);
itr = backups_.erase(itr);
}
PutLatestBackupFileContents(latest_backup_id_); // Ignore errors
GarbageCollection(true);
Log(options_.info_log,
"Initialized BackupEngine, the latest backup is %u.",
latest_backup_id_);
}
BackupEngine::~BackupEngine() {
LogFlush(options_.info_log);
}
void BackupEngine::DeleteBackupsNewerThan(uint64_t sequence_number) {
for (auto backup : backups_) {
if (backup.second.GetSequenceNumber() > sequence_number) {
Log(options_.info_log,
"Deleting backup %u because sequence number (%" PRIu64
") is newer than %" PRIu64 "",
backup.first, backup.second.GetSequenceNumber(), sequence_number);
backup.second.Delete();
obsolete_backups_.push_back(backup.first);
}
}
for (auto ob : obsolete_backups_) {
backups_.erase(backups_.find(ob));
}
auto itr = backups_.end();
latest_backup_id_ = (itr == backups_.begin()) ? 0 : (--itr)->first;
PutLatestBackupFileContents(latest_backup_id_); // Ignore errors
GarbageCollection(false);
}
Status BackupEngine::CreateNewBackup(DB* db, bool flush_before_backup) {
Status s;
std::vector<std::string> live_files;
VectorLogPtr live_wal_files;
uint64_t manifest_file_size = 0;
uint64_t sequence_number = db->GetLatestSequenceNumber();
s = db->DisableFileDeletions();
if (s.ok()) {
// this will return live_files prefixed with "/"
s = db->GetLiveFiles(live_files, &manifest_file_size, flush_before_backup);
}
// if we didn't flush before backup, we need to also get WAL files
if (s.ok() && !flush_before_backup) {
// returns file names prefixed with "/"
s = db->GetSortedWalFiles(live_wal_files);
}
if (!s.ok()) {
db->EnableFileDeletions();
return s;
}
BackupID new_backup_id = latest_backup_id_ + 1;
assert(backups_.find(new_backup_id) == backups_.end());
auto ret = backups_.insert(std::make_pair(
new_backup_id, BackupMeta(GetBackupMetaFile(new_backup_id),
&backuped_file_refs_, backup_env_)));
assert(ret.second == true);
auto& new_backup = ret.first->second;
new_backup.RecordTimestamp();
new_backup.SetSequenceNumber(sequence_number);
Log(options_.info_log, "Started the backup process -- creating backup %u",
new_backup_id);
// create private dir
s = backup_env_->CreateDir(GetAbsolutePath(GetPrivateFileRel(new_backup_id)));
// copy live_files
for (size_t i = 0; s.ok() && i < live_files.size(); ++i) {
uint64_t number;
FileType type;
bool ok = ParseFileName(live_files[i], &number, &type);
if (!ok) {
assert(false);
return Status::Corruption("Can't parse file name. This is very bad");
}
// we should only get sst, manifest and current files here
assert(type == kTableFile ||
type == kDescriptorFile ||
type == kCurrentFile);
// rules:
// * if it's kTableFile, than it's shared
// * if it's kDescriptorFile, limit the size to manifest_file_size
s = BackupFile(new_backup_id,
&new_backup,
type == kTableFile, /* shared */
db->GetName(), /* src_dir */
live_files[i], /* src_fname */
(type == kDescriptorFile) ? manifest_file_size : 0);
}
// copy WAL files
for (size_t i = 0; s.ok() && i < live_wal_files.size(); ++i) {
if (live_wal_files[i]->Type() == kAliveLogFile) {
// we only care about live log files
// copy the file into backup_dir/files/<new backup>/
s = BackupFile(new_backup_id,
&new_backup,
false, /* not shared */
db->GetOptions().wal_dir,
live_wal_files[i]->PathName());
}
}
// we copied all the files, enable file deletions
db->EnableFileDeletions();
if (s.ok()) {
// persist the backup metadata on the disk
s = new_backup.StoreToFile(options_.sync);
}
if (s.ok()) {
// install the newly created backup meta! (atomic)
s = PutLatestBackupFileContents(new_backup_id);
}
if (!s.ok()) {
// clean all the files we might have created
Log(options_.info_log, "Backup failed -- %s", s.ToString().c_str());
backups_.erase(new_backup_id);
GarbageCollection(true);
return s;
}
// here we know that we succeeded and installed the new backup
// in the LATEST_BACKUP file
latest_backup_id_ = new_backup_id;
Log(options_.info_log, "Backup DONE. All is good");
return s;
}
Status BackupEngine::PurgeOldBackups(uint32_t num_backups_to_keep) {
Log(options_.info_log, "Purging old backups, keeping %u",
num_backups_to_keep);
while (num_backups_to_keep < backups_.size()) {
Log(options_.info_log, "Deleting backup %u", backups_.begin()->first);
backups_.begin()->second.Delete();
obsolete_backups_.push_back(backups_.begin()->first);
backups_.erase(backups_.begin());
}
GarbageCollection(false);
return Status::OK();
}
Status BackupEngine::DeleteBackup(BackupID backup_id) {
Log(options_.info_log, "Deleting backup %u", backup_id);
auto backup = backups_.find(backup_id);
if (backup == backups_.end()) {
return Status::NotFound("Backup not found");
}
backup->second.Delete();
obsolete_backups_.push_back(backup_id);
backups_.erase(backup);
GarbageCollection(false);
return Status::OK();
}
void BackupEngine::GetBackupInfo(std::vector<BackupInfo>* backup_info) {
backup_info->reserve(backups_.size());
for (auto& backup : backups_) {
if (!backup.second.Empty()) {
backup_info->push_back(BackupInfo(
backup.first, backup.second.GetTimestamp(), backup.second.GetSize()));
}
}
}
Status BackupEngine::RestoreDBFromBackup(BackupID backup_id,
const std::string &db_dir,
const std::string &wal_dir) {
auto backup_itr = backups_.find(backup_id);
if (backup_itr == backups_.end()) {
return Status::NotFound("Backup not found");
}
auto& backup = backup_itr->second;
if (backup.Empty()) {
return Status::NotFound("Backup not found");
}
Log(options_.info_log, "Restoring backup id %u\n", backup_id);
// just in case. Ignore errors
db_env_->CreateDirIfMissing(db_dir);
db_env_->CreateDirIfMissing(wal_dir);
// delete log files that might have been already in wal_dir.
// This is important since they might get replayed to the restored DB,
// which will then differ from the backuped DB
std::vector<std::string> delete_children;
db_env_->GetChildren(wal_dir, &delete_children); // ignore errors
for (auto f : delete_children) {
db_env_->DeleteFile(wal_dir + "/" + f); // ignore errors
}
// Also delete all the db_dir children. This is not so important
// because obsolete files will be deleted by DBImpl::PurgeObsoleteFiles()
delete_children.clear();
db_env_->GetChildren(db_dir, &delete_children); // ignore errors
for (auto f : delete_children) {
db_env_->DeleteFile(db_dir + "/" + f); // ignore errors
}
Status s;
for (auto& file : backup.GetFiles()) {
std::string dst;
// 1. extract the filename
size_t slash = file.find_last_of('/');
// file will either be shared/<file> or private/<number>/<file>
assert(slash != std::string::npos);
dst = file.substr(slash + 1);
// 2. find the filetype
uint64_t number;
FileType type;
bool ok = ParseFileName(dst, &number, &type);
if (!ok) {
return Status::Corruption("Backup corrupted");
}
// 3. Construct the final path
// kLogFile lives in wal_dir and all the rest live in db_dir
dst = ((type == kLogFile) ? wal_dir : db_dir) +
"/" + dst;
Log(options_.info_log, "Restoring %s to %s\n", file.c_str(), dst.c_str());
s = CopyFile(GetAbsolutePath(file), dst, backup_env_, db_env_, false);
if (!s.ok()) {
break;
}
}
Log(options_.info_log, "Restoring done -- %s\n", s.ToString().c_str());
return s;
}
// latest backup id is an ASCII representation of latest backup id
Status BackupEngine::GetLatestBackupFileContents(uint32_t* latest_backup) {
Status s;
unique_ptr<SequentialFile> file;
s = backup_env_->NewSequentialFile(GetLatestBackupFile(),
&file,
EnvOptions());
if (!s.ok()) {
return s;
}
char buf[11];
Slice data;
s = file->Read(10, &data, buf);
if (!s.ok() || data.size() == 0) {
return s.ok() ? Status::Corruption("Latest backup file corrupted") : s;
}
buf[data.size()] = 0;
*latest_backup = 0;
sscanf(data.data(), "%u", latest_backup);
if (backup_env_->FileExists(GetBackupMetaFile(*latest_backup)) == false) {
s = Status::Corruption("Latest backup file corrupted");
}
return Status::OK();
}
// this operation HAS to be atomic
// writing 4 bytes to the file is atomic alright, but we should *never*
// do something like 1. delete file, 2. write new file
// We write to a tmp file and then atomically rename
Status BackupEngine::PutLatestBackupFileContents(uint32_t latest_backup) {
Status s;
unique_ptr<WritableFile> file;
EnvOptions env_options;
env_options.use_mmap_writes = false;
s = backup_env_->NewWritableFile(GetLatestBackupFile(true),
&file,
env_options);
if (!s.ok()) {
backup_env_->DeleteFile(GetLatestBackupFile(true));
return s;
}
char file_contents[10];
int len = sprintf(file_contents, "%u\n", latest_backup);
s = file->Append(Slice(file_contents, len));
if (s.ok() && options_.sync) {
file->Sync();
}
if (s.ok()) {
s = file->Close();
}
if (s.ok()) {
// atomically replace real file with new tmp
s = backup_env_->RenameFile(GetLatestBackupFile(true),
GetLatestBackupFile(false));
}
return s;
}
Status BackupEngine::CopyFile(const std::string& src,
const std::string& dst,
Env* src_env,
Env* dst_env,
bool sync,
uint64_t* size,
uint64_t size_limit) {
Status s;
unique_ptr<WritableFile> dst_file;
unique_ptr<SequentialFile> src_file;
EnvOptions env_options;
env_options.use_mmap_writes = false;
if (size != nullptr) {
*size = 0;
}
// Check if size limit is set. if not, set it to very big number
if (size_limit == 0) {
size_limit = std::numeric_limits<uint64_t>::max();
}
s = src_env->NewSequentialFile(src, &src_file, env_options);
if (s.ok()) {
s = dst_env->NewWritableFile(dst, &dst_file, env_options);
}
if (!s.ok()) {
return s;
}
unique_ptr<char[]> buf(new char[copy_file_buffer_size_]);
Slice data;
do {
size_t buffer_to_read = (copy_file_buffer_size_ < size_limit) ?
copy_file_buffer_size_ : size_limit;
s = src_file->Read(buffer_to_read, &data, buf.get());
size_limit -= data.size();
if (size != nullptr) {
*size += data.size();
}
if (s.ok()) {
s = dst_file->Append(data);
}
} while (s.ok() && data.size() > 0 && size_limit > 0);
if (s.ok() && sync) {
s = dst_file->Sync();
}
return s;
}
// src_fname will always start with "/"
Status BackupEngine::BackupFile(BackupID backup_id,
BackupMeta* backup,
bool shared,
const std::string& src_dir,
const std::string& src_fname,
uint64_t size_limit) {
assert(src_fname.size() > 0 && src_fname[0] == '/');
std::string dst_relative = src_fname.substr(1);
if (shared) {
dst_relative = GetSharedFileRel(dst_relative);
} else {
dst_relative = GetPrivateFileRel(backup_id, dst_relative);
}
std::string dst_path = GetAbsolutePath(dst_relative);
Status s;
uint64_t size;
// if it's shared, we also need to check if it exists -- if it does,
// no need to copy it again
if (shared && backup_env_->FileExists(dst_path)) {
backup_env_->GetFileSize(dst_path, &size); // Ignore error
Log(options_.info_log, "%s already present", src_fname.c_str());
} else {
Log(options_.info_log, "Copying %s", src_fname.c_str());
s = CopyFile(src_dir + src_fname,
dst_path,
db_env_,
backup_env_,
options_.sync,
&size,
size_limit);
}
if (s.ok()) {
backup->AddFile(dst_relative, size);
}
return s;
}
void BackupEngine::GarbageCollection(bool full_scan) {
Log(options_.info_log, "Starting garbage collection");
std::vector<std::string> to_delete;
for (auto& itr : backuped_file_refs_) {
if (itr.second == 0) {
Status s = backup_env_->DeleteFile(GetAbsolutePath(itr.first));
Log(options_.info_log, "Deleting %s -- %s", itr.first.c_str(),
s.ToString().c_str());
to_delete.push_back(itr.first);
}
}
for (auto& td : to_delete) {
backuped_file_refs_.erase(td);
}
if (!full_scan) {
// take care of private dirs -- if full_scan == true, then full_scan will
// take care of them
for (auto backup_id : obsolete_backups_) {
std::string private_dir = GetPrivateFileRel(backup_id);
Status s = backup_env_->DeleteDir(GetAbsolutePath(private_dir));
Log(options_.info_log, "Deleting private dir %s -- %s",
private_dir.c_str(), s.ToString().c_str());
}
}
obsolete_backups_.clear();
if (full_scan) {
Log(options_.info_log, "Starting full scan garbage collection");
// delete obsolete shared files
std::vector<std::string> shared_children;
backup_env_->GetChildren(GetAbsolutePath(GetSharedFileRel()),
&shared_children);
for (auto& child : shared_children) {
std::string rel_fname = GetSharedFileRel(child);
// if it's not refcounted, delete it
if (backuped_file_refs_.find(rel_fname) == backuped_file_refs_.end()) {
// this might be a directory, but DeleteFile will just fail in that
// case, so we're good
Status s = backup_env_->DeleteFile(GetAbsolutePath(rel_fname));
if (s.ok()) {
Log(options_.info_log, "Deleted %s", rel_fname.c_str());
}
}
}
// delete obsolete private files
std::vector<std::string> private_children;
backup_env_->GetChildren(GetAbsolutePath(GetPrivateDirRel()),
&private_children);
for (auto& child : private_children) {
BackupID backup_id = 0;
sscanf(child.c_str(), "%u", &backup_id);
if (backup_id == 0 || backups_.find(backup_id) != backups_.end()) {
// it's either not a number or it's still alive. continue
continue;
}
// here we have to delete the dir and all its children
std::string full_private_path =
GetAbsolutePath(GetPrivateFileRel(backup_id));
std::vector<std::string> subchildren;
backup_env_->GetChildren(full_private_path, &subchildren);
for (auto& subchild : subchildren) {
Status s = backup_env_->DeleteFile(full_private_path + subchild);
if (s.ok()) {
Log(options_.info_log, "Deleted %s",
(full_private_path + subchild).c_str());
}
}
// finally delete the private dir
Status s = backup_env_->DeleteDir(full_private_path);
Log(options_.info_log, "Deleted dir %s -- %s", full_private_path.c_str(),
s.ToString().c_str());
}
}
}
// ------- BackupMeta class --------
void BackupEngine::BackupMeta::AddFile(const std::string& filename,
uint64_t size) {
size_ += size;
files_.push_back(filename);
auto itr = file_refs_->find(filename);
if (itr == file_refs_->end()) {
file_refs_->insert(std::make_pair(filename, 1));
} else {
++itr->second; // increase refcount if already present
}
}
void BackupEngine::BackupMeta::Delete() {
for (auto& file : files_) {
auto itr = file_refs_->find(file);
assert(itr != file_refs_->end());
--(itr->second); // decrease refcount
}
files_.clear();
// delete meta file
env_->DeleteFile(meta_filename_);
timestamp_ = 0;
}
// each backup meta file is of the format:
// <timestamp>
// <seq number>
// <number of files>
// <file1>
// <file2>
// ...
// TODO: maybe add checksum?
Status BackupEngine::BackupMeta::LoadFromFile(const std::string& backup_dir) {
assert(Empty());
Status s;
unique_ptr<SequentialFile> backup_meta_file;
s = env_->NewSequentialFile(meta_filename_, &backup_meta_file, EnvOptions());
if (!s.ok()) {
return s;
}
unique_ptr<char[]> buf(new char[max_backup_meta_file_size_ + 1]);
Slice data;
s = backup_meta_file->Read(max_backup_meta_file_size_, &data, buf.get());
if (!s.ok() || data.size() == max_backup_meta_file_size_) {
return s.ok() ? Status::IOError("File size too big") : s;
}
buf[data.size()] = 0;
uint32_t num_files = 0;
int bytes_read = 0;
sscanf(data.data(), "%" PRId64 "%n", &timestamp_, &bytes_read);
data.remove_prefix(bytes_read + 1); // +1 for '\n'
sscanf(data.data(), "%" PRIu64 "%n", &sequence_number_, &bytes_read);
data.remove_prefix(bytes_read + 1); // +1 for '\n'
sscanf(data.data(), "%u%n", &num_files, &bytes_read);
data.remove_prefix(bytes_read + 1); // +1 for '\n'
std::vector<std::pair<std::string, uint64_t>> files;
for (uint32_t i = 0; s.ok() && i < num_files; ++i) {
std::string filename = GetSliceUntil(&data, '\n').ToString();
uint64_t size;
s = env_->GetFileSize(backup_dir + "/" + filename, &size);
files.push_back(std::make_pair(filename, size));
}
if (s.ok()) {
for (auto file : files) {
AddFile(file.first, file.second);
}
}
return s;
}
Status BackupEngine::BackupMeta::StoreToFile(bool sync) {
Status s;
unique_ptr<WritableFile> backup_meta_file;
EnvOptions env_options;
env_options.use_mmap_writes = false;
s = env_->NewWritableFile(meta_filename_ + ".tmp", &backup_meta_file,
env_options);
if (!s.ok()) {
return s;
}
unique_ptr<char[]> buf(new char[max_backup_meta_file_size_]);
int len = 0, buf_size = max_backup_meta_file_size_;
len += snprintf(buf.get(), buf_size, "%" PRId64 "\n", timestamp_);
len += snprintf(buf.get() + len, buf_size - len, "%" PRIu64 "\n",
sequence_number_);
len += snprintf(buf.get() + len, buf_size - len, "%zu\n", files_.size());
for (size_t i = 0; i < files_.size(); ++i) {
len += snprintf(buf.get() + len, buf_size - len, "%s\n", files_[i].c_str());
}
s = backup_meta_file->Append(Slice(buf.get(), (size_t)len));
if (s.ok() && sync) {
s = backup_meta_file->Sync();
}
if (s.ok()) {
s = backup_meta_file->Close();
}
if (s.ok()) {
s = env_->RenameFile(meta_filename_ + ".tmp", meta_filename_);
}
return s;
}
// --- BackupableDB methods --------
BackupableDB::BackupableDB(DB* db, const BackupableDBOptions& options)
: StackableDB(db), backup_engine_(new BackupEngine(db->GetEnv(), options)) {
backup_engine_->DeleteBackupsNewerThan(GetLatestSequenceNumber());
}
BackupableDB::~BackupableDB() {
delete backup_engine_;
}
Status BackupableDB::CreateNewBackup(bool flush_before_backup) {
return backup_engine_->CreateNewBackup(this, flush_before_backup);
}
void BackupableDB::GetBackupInfo(std::vector<BackupInfo>* backup_info) {
backup_engine_->GetBackupInfo(backup_info);
}
Status BackupableDB::PurgeOldBackups(uint32_t num_backups_to_keep) {
return backup_engine_->PurgeOldBackups(num_backups_to_keep);
}
Status BackupableDB::DeleteBackup(BackupID backup_id) {
return backup_engine_->DeleteBackup(backup_id);
}
// --- RestoreBackupableDB methods ------
RestoreBackupableDB::RestoreBackupableDB(Env* db_env,
const BackupableDBOptions& options)
: backup_engine_(new BackupEngine(db_env, options)) {}
RestoreBackupableDB::~RestoreBackupableDB() {
delete backup_engine_;
}
void
RestoreBackupableDB::GetBackupInfo(std::vector<BackupInfo>* backup_info) {
backup_engine_->GetBackupInfo(backup_info);
}
Status RestoreBackupableDB::RestoreDBFromBackup(BackupID backup_id,
const std::string& db_dir,
const std::string& wal_dir) {
return backup_engine_->RestoreDBFromBackup(backup_id, db_dir, wal_dir);
}
Status
RestoreBackupableDB::RestoreDBFromLatestBackup(const std::string& db_dir,
const std::string& wal_dir) {
return backup_engine_->RestoreDBFromLatestBackup(db_dir, wal_dir);
}
Status RestoreBackupableDB::PurgeOldBackups(uint32_t num_backups_to_keep) {
return backup_engine_->PurgeOldBackups(num_backups_to_keep);
}
Status RestoreBackupableDB::DeleteBackup(BackupID backup_id) {
return backup_engine_->DeleteBackup(backup_id);
}
} // namespace rocksdb

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// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include "rocksdb/types.h"
#include "rocksdb/transaction_log.h"
#include "utilities/utility_db.h"
#include "utilities/backupable_db.h"
#include "util/testharness.h"
#include "util/random.h"
#include "util/testutil.h"
#include "util/auto_roll_logger.h"
#include <string>
#include <algorithm>
namespace rocksdb {
namespace {
using std::unique_ptr;
class DummyDB : public StackableDB {
public:
/* implicit */
DummyDB(const Options& options, const std::string& dbname)
: StackableDB(nullptr), options_(options), dbname_(dbname),
deletions_enabled_(true), sequence_number_(0) {}
virtual SequenceNumber GetLatestSequenceNumber() const {
return ++sequence_number_;
}
virtual const std::string& GetName() const override {
return dbname_;
}
virtual Env* GetEnv() const override {
return options_.env;
}
virtual const Options& GetOptions() const override {
return options_;
}
virtual Status EnableFileDeletions() override {
ASSERT_TRUE(!deletions_enabled_);
deletions_enabled_ = true;
return Status::OK();
}
virtual Status DisableFileDeletions() override {
ASSERT_TRUE(deletions_enabled_);
deletions_enabled_ = false;
return Status::OK();
}
virtual Status GetLiveFiles(std::vector<std::string>& vec, uint64_t* mfs,
bool flush_memtable = true) override {
ASSERT_TRUE(!deletions_enabled_);
vec = live_files_;
*mfs = 100;
return Status::OK();
}
class DummyLogFile : public LogFile {
public:
/* implicit */
DummyLogFile(const std::string& path, bool alive = true)
: path_(path), alive_(alive) {}
virtual std::string PathName() const override {
return path_;
}
virtual uint64_t LogNumber() const {
// what business do you have calling this method?
ASSERT_TRUE(false);
return 0;
}
virtual WalFileType Type() const override {
return alive_ ? kAliveLogFile : kArchivedLogFile;
}
virtual SequenceNumber StartSequence() const {
// backupabledb should not need this method
ASSERT_TRUE(false);
return 0;
}
virtual uint64_t SizeFileBytes() const {
// backupabledb should not need this method
ASSERT_TRUE(false);
return 0;
}
private:
std::string path_;
bool alive_;
}; // DummyLogFile
virtual Status GetSortedWalFiles(VectorLogPtr& files) override {
ASSERT_TRUE(!deletions_enabled_);
files.resize(wal_files_.size());
for (size_t i = 0; i < files.size(); ++i) {
files[i].reset(
new DummyLogFile(wal_files_[i].first, wal_files_[i].second));
}
return Status::OK();
}
std::vector<std::string> live_files_;
// pair<filename, alive?>
std::vector<std::pair<std::string, bool>> wal_files_;
private:
Options options_;
std::string dbname_;
bool deletions_enabled_;
mutable SequenceNumber sequence_number_;
}; // DummyDB
class TestEnv : public EnvWrapper {
public:
explicit TestEnv(Env* t) : EnvWrapper(t) {}
class DummySequentialFile : public SequentialFile {
public:
DummySequentialFile() : SequentialFile(), rnd_(5) {}
virtual Status Read(size_t n, Slice* result, char* scratch) {
size_t read_size = (n > size_left) ? size_left : n;
for (size_t i = 0; i < read_size; ++i) {
scratch[i] = rnd_.Next() & 255;
}
*result = Slice(scratch, read_size);
size_left -= read_size;
return Status::OK();
}
virtual Status Skip(uint64_t n) {
size_left = (n > size_left) ? size_left - n : 0;
return Status::OK();
}
private:
size_t size_left = 200;
Random rnd_;
};
Status NewSequentialFile(const std::string& f,
unique_ptr<SequentialFile>* r,
const EnvOptions& options) {
opened_files_.push_back(f);
if (dummy_sequential_file_) {
r->reset(new TestEnv::DummySequentialFile());
return Status::OK();
} else {
return EnvWrapper::NewSequentialFile(f, r, options);
}
}
Status NewWritableFile(const std::string& f, unique_ptr<WritableFile>* r,
const EnvOptions& options) {
if (limit_written_files_ <= 0) {
return Status::IOError("Sorry, can't do this");
}
limit_written_files_--;
return EnvWrapper::NewWritableFile(f, r, options);
}
void AssertOpenedFiles(std::vector<std::string>& should_have_opened) {
sort(should_have_opened.begin(), should_have_opened.end());
sort(opened_files_.begin(), opened_files_.end());
ASSERT_TRUE(opened_files_ == should_have_opened);
}
void ClearOpenedFiles() {
opened_files_.clear();
}
void SetLimitWrittenFiles(uint64_t limit) {
limit_written_files_ = limit;
}
void SetDummySequentialFile(bool dummy_sequential_file) {
dummy_sequential_file_ = dummy_sequential_file;
}
private:
bool dummy_sequential_file_ = false;
std::vector<std::string> opened_files_;
uint64_t limit_written_files_ = 1000000;
}; // TestEnv
class FileManager : public EnvWrapper {
public:
explicit FileManager(Env* t) : EnvWrapper(t), rnd_(5) {}
Status DeleteRandomFileInDir(const std::string dir) {
std::vector<std::string> children;
GetChildren(dir, &children);
if (children.size() <= 2) { // . and ..
return Status::NotFound("");
}
while (true) {
int i = rnd_.Next() % children.size();
if (children[i] != "." && children[i] != "..") {
return DeleteFile(dir + "/" + children[i]);
}
}
// should never get here
assert(false);
return Status::NotFound("");
}
Status CorruptFile(const std::string& fname, uint64_t bytes_to_corrupt) {
uint64_t size;
Status s = GetFileSize(fname, &size);
if (!s.ok()) {
return s;
}
unique_ptr<RandomRWFile> file;
EnvOptions env_options;
env_options.use_mmap_writes = false;
s = NewRandomRWFile(fname, &file, env_options);
if (!s.ok()) {
return s;
}
for (uint64_t i = 0; s.ok() && i < bytes_to_corrupt; ++i) {
std::string tmp;
// write one random byte to a random position
s = file->Write(rnd_.Next() % size, test::RandomString(&rnd_, 1, &tmp));
}
return s;
}
Status WriteToFile(const std::string& fname, const std::string& data) {
unique_ptr<WritableFile> file;
EnvOptions env_options;
env_options.use_mmap_writes = false;
Status s = EnvWrapper::NewWritableFile(fname, &file, env_options);
if (!s.ok()) {
return s;
}
return file->Append(Slice(data));
}
private:
Random rnd_;
}; // FileManager
// utility functions
static void FillDB(DB* db, int from, int to) {
for (int i = from; i < to; ++i) {
std::string key = "testkey" + std::to_string(i);
std::string value = "testvalue" + std::to_string(i);
ASSERT_OK(db->Put(WriteOptions(), Slice(key), Slice(value)));
}
}
static void AssertExists(DB* db, int from, int to) {
for (int i = from; i < to; ++i) {
std::string key = "testkey" + std::to_string(i);
std::string value;
Status s = db->Get(ReadOptions(), Slice(key), &value);
ASSERT_EQ(value, "testvalue" + std::to_string(i));
}
}
static void AssertEmpty(DB* db, int from, int to) {
for (int i = from; i < to; ++i) {
std::string key = "testkey" + std::to_string(i);
std::string value = "testvalue" + std::to_string(i);
Status s = db->Get(ReadOptions(), Slice(key), &value);
ASSERT_TRUE(s.IsNotFound());
}
}
class BackupableDBTest {
public:
BackupableDBTest() {
// set up files
dbname_ = test::TmpDir() + "/backupable_db";
backupdir_ = test::TmpDir() + "/backupable_db_backup";
// set up envs
env_ = Env::Default();
test_db_env_.reset(new TestEnv(env_));
test_backup_env_.reset(new TestEnv(env_));
file_manager_.reset(new FileManager(env_));
// set up db options
options_.create_if_missing = true;
options_.paranoid_checks = true;
options_.write_buffer_size = 1 << 17; // 128KB
options_.env = test_db_env_.get();
options_.wal_dir = dbname_;
// set up backup db options
CreateLoggerFromOptions(dbname_, backupdir_, env_,
Options(), &logger_);
backupable_options_.reset(new BackupableDBOptions(
backupdir_, test_backup_env_.get(), logger_.get(), true));
// delete old files in db
DestroyDB(dbname_, Options());
}
DB* OpenDB() {
DB* db;
ASSERT_OK(DB::Open(options_, dbname_, &db));
return db;
}
void OpenBackupableDB(bool destroy_old_data = false, bool dummy = false) {
// reset all the defaults
test_backup_env_->SetLimitWrittenFiles(1000000);
test_db_env_->SetLimitWrittenFiles(1000000);
test_db_env_->SetDummySequentialFile(dummy);
DB* db;
if (dummy) {
dummy_db_ = new DummyDB(options_, dbname_);
db = dummy_db_;
} else {
ASSERT_OK(DB::Open(options_, dbname_, &db));
}
backupable_options_->destroy_old_data = destroy_old_data;
db_.reset(new BackupableDB(db, *backupable_options_));
}
void CloseBackupableDB() {
db_.reset(nullptr);
}
void OpenRestoreDB() {
backupable_options_->destroy_old_data = false;
restore_db_.reset(
new RestoreBackupableDB(test_db_env_.get(), *backupable_options_));
}
void CloseRestoreDB() {
restore_db_.reset(nullptr);
}
// restores backup backup_id and asserts the existence of
// [start_exist, end_exist> and not-existence of
// [end_exist, end>
//
// if backup_id == 0, it means restore from latest
// if end == 0, don't check AssertEmpty
void AssertBackupConsistency(BackupID backup_id, uint32_t start_exist,
uint32_t end_exist, uint32_t end = 0) {
bool opened_restore = false;
if (restore_db_.get() == nullptr) {
opened_restore = true;
OpenRestoreDB();
}
if (backup_id > 0) {
ASSERT_OK(restore_db_->RestoreDBFromBackup(backup_id, dbname_, dbname_));
} else {
ASSERT_OK(restore_db_->RestoreDBFromLatestBackup(dbname_, dbname_));
}
DB* db = OpenDB();
AssertExists(db, start_exist, end_exist);
if (end != 0) {
AssertEmpty(db, end_exist, end);
}
delete db;
if (opened_restore) {
CloseRestoreDB();
}
}
// files
std::string dbname_;
std::string backupdir_;
// envs
Env* env_;
unique_ptr<TestEnv> test_db_env_;
unique_ptr<TestEnv> test_backup_env_;
unique_ptr<FileManager> file_manager_;
// all the dbs!
DummyDB* dummy_db_; // BackupableDB owns dummy_db_
unique_ptr<BackupableDB> db_;
unique_ptr<RestoreBackupableDB> restore_db_;
// options
Options options_;
unique_ptr<BackupableDBOptions> backupable_options_;
std::shared_ptr<Logger> logger_;
}; // BackupableDBTest
void AppendPath(const std::string& path, std::vector<std::string>& v) {
for (auto& f : v) {
f = path + f;
}
}
// this will make sure that backup does not copy the same file twice
TEST(BackupableDBTest, NoDoubleCopy) {
OpenBackupableDB(true, true);
// should write 5 DB files + LATEST_BACKUP + one meta file
test_backup_env_->SetLimitWrittenFiles(7);
test_db_env_->ClearOpenedFiles();
test_db_env_->SetLimitWrittenFiles(0);
dummy_db_->live_files_ = { "/00010.sst", "/00011.sst",
"/CURRENT", "/MANIFEST-01" };
dummy_db_->wal_files_ = {{"/00011.log", true}, {"/00012.log", false}};
ASSERT_OK(db_->CreateNewBackup(false));
std::vector<std::string> should_have_openened = dummy_db_->live_files_;
should_have_openened.push_back("/00011.log");
AppendPath(dbname_, should_have_openened);
test_db_env_->AssertOpenedFiles(should_have_openened);
// should write 4 new DB files + LATEST_BACKUP + one meta file
// should not write/copy 00010.sst, since it's already there!
test_backup_env_->SetLimitWrittenFiles(6);
test_db_env_->ClearOpenedFiles();
dummy_db_->live_files_ = { "/00010.sst", "/00015.sst",
"/CURRENT", "/MANIFEST-01" };
dummy_db_->wal_files_ = {{"/00011.log", true}, {"/00012.log", false}};
ASSERT_OK(db_->CreateNewBackup(false));
// should not open 00010.sst - it's already there
should_have_openened = { "/00015.sst", "/CURRENT",
"/MANIFEST-01", "/00011.log" };
AppendPath(dbname_, should_have_openened);
test_db_env_->AssertOpenedFiles(should_have_openened);
ASSERT_OK(db_->DeleteBackup(1));
ASSERT_EQ(true,
test_backup_env_->FileExists(backupdir_ + "/shared/00010.sst"));
// 00011.sst was only in backup 1, should be deleted
ASSERT_EQ(false,
test_backup_env_->FileExists(backupdir_ + "/shared/00011.sst"));
ASSERT_EQ(true,
test_backup_env_->FileExists(backupdir_ + "/shared/00015.sst"));
// MANIFEST file size should be only 100
uint64_t size;
test_backup_env_->GetFileSize(backupdir_ + "/private/2/MANIFEST-01", &size);
ASSERT_EQ(100UL, size);
test_backup_env_->GetFileSize(backupdir_ + "/shared/00015.sst", &size);
ASSERT_EQ(200UL, size);
CloseBackupableDB();
}
// test various kind of corruptions that may happen:
// 1. Not able to write a file for backup - that backup should fail,
// everything else should work
// 2. Corrupted/deleted LATEST_BACKUP - everything should work fine
// 3. Corrupted backup meta file or missing backuped file - we should
// not be able to open that backup, but all other backups should be
// fine
TEST(BackupableDBTest, CorruptionsTest) {
const int keys_iteration = 5000;
Random rnd(6);
Status s;
OpenBackupableDB(true);
// create five backups
for (int i = 0; i < 5; ++i) {
FillDB(db_.get(), keys_iteration * i, keys_iteration * (i + 1));
ASSERT_OK(db_->CreateNewBackup(!!(rnd.Next() % 2)));
}
// ---------- case 1. - fail a write -----------
// try creating backup 6, but fail a write
FillDB(db_.get(), keys_iteration * 5, keys_iteration * 6);
test_backup_env_->SetLimitWrittenFiles(2);
// should fail
s = db_->CreateNewBackup(!!(rnd.Next() % 2));
ASSERT_TRUE(!s.ok());
test_backup_env_->SetLimitWrittenFiles(1000000);
// latest backup should have all the keys
CloseBackupableDB();
AssertBackupConsistency(0, 0, keys_iteration * 5, keys_iteration * 6);
// ---------- case 2. - corrupt/delete latest backup -----------
ASSERT_OK(file_manager_->CorruptFile(backupdir_ + "/LATEST_BACKUP", 2));
AssertBackupConsistency(0, 0, keys_iteration * 5);
ASSERT_OK(file_manager_->DeleteFile(backupdir_ + "/LATEST_BACKUP"));
AssertBackupConsistency(0, 0, keys_iteration * 5);
// create backup 6, point LATEST_BACKUP to 5
OpenBackupableDB();
FillDB(db_.get(), keys_iteration * 5, keys_iteration * 6);
ASSERT_OK(db_->CreateNewBackup(false));
CloseBackupableDB();
ASSERT_OK(file_manager_->WriteToFile(backupdir_ + "/LATEST_BACKUP", "5"));
AssertBackupConsistency(0, 0, keys_iteration * 5, keys_iteration * 6);
// assert that all 6 data is gone!
ASSERT_TRUE(file_manager_->FileExists(backupdir_ + "/meta/6") == false);
ASSERT_TRUE(file_manager_->FileExists(backupdir_ + "/private/6") == false);
// --------- case 3. corrupted backup meta or missing backuped file ----
ASSERT_OK(file_manager_->CorruptFile(backupdir_ + "/meta/5", 3));
// since 5 meta is now corrupted, latest backup should be 4
AssertBackupConsistency(0, 0, keys_iteration * 4, keys_iteration * 5);
OpenRestoreDB();
s = restore_db_->RestoreDBFromBackup(5, dbname_, dbname_);
ASSERT_TRUE(!s.ok());
CloseRestoreDB();
ASSERT_OK(file_manager_->DeleteRandomFileInDir(backupdir_ + "/private/4"));
// 4 is corrupted, 3 is the latest backup now
AssertBackupConsistency(0, 0, keys_iteration * 3, keys_iteration * 5);
OpenRestoreDB();
s = restore_db_->RestoreDBFromBackup(4, dbname_, dbname_);
CloseRestoreDB();
ASSERT_TRUE(!s.ok());
// new backup should be 4!
OpenBackupableDB();
FillDB(db_.get(), keys_iteration * 3, keys_iteration * 4);
ASSERT_OK(db_->CreateNewBackup(!!(rnd.Next() % 2)));
CloseBackupableDB();
AssertBackupConsistency(4, 0, keys_iteration * 4, keys_iteration * 5);
}
// open DB, write, close DB, backup, restore, repeat
TEST(BackupableDBTest, OfflineIntegrationTest) {
// has to be a big number, so that it triggers the memtable flush
const int keys_iteration = 5000;
const int max_key = keys_iteration * 4 + 10;
// first iter -- flush before backup
// second iter -- don't flush before backup
for (int iter = 0; iter < 2; ++iter) {
// delete old data
DestroyDB(dbname_, Options());
bool destroy_data = true;
// every iteration --
// 1. insert new data in the DB
// 2. backup the DB
// 3. destroy the db
// 4. restore the db, check everything is still there
for (int i = 0; i < 5; ++i) {
// in last iteration, put smaller amount of data,
int fill_up_to = std::min(keys_iteration * (i + 1), max_key);
// ---- insert new data and back up ----
OpenBackupableDB(destroy_data);
destroy_data = false;
FillDB(db_.get(), keys_iteration * i, fill_up_to);
ASSERT_OK(db_->CreateNewBackup(iter == 0));
CloseBackupableDB();
DestroyDB(dbname_, Options());
// ---- make sure it's empty ----
DB* db = OpenDB();
AssertEmpty(db, 0, fill_up_to);
delete db;
// ---- restore the DB ----
OpenRestoreDB();
if (i >= 3) { // test purge old backups
// when i == 4, purge to only 1 backup
// when i == 3, purge to 2 backups
ASSERT_OK(restore_db_->PurgeOldBackups(5 - i));
}
// ---- make sure the data is there ---
AssertBackupConsistency(0, 0, fill_up_to, max_key);
CloseRestoreDB();
}
}
}
// open DB, write, backup, write, backup, close, restore
TEST(BackupableDBTest, OnlineIntegrationTest) {
// has to be a big number, so that it triggers the memtable flush
const int keys_iteration = 5000;
const int max_key = keys_iteration * 4 + 10;
Random rnd(7);
// delete old data
DestroyDB(dbname_, Options());
OpenBackupableDB(true);
// write some data, backup, repeat
for (int i = 0; i < 5; ++i) {
if (i == 4) {
// delete backup number 2, online delete!
OpenRestoreDB();
ASSERT_OK(restore_db_->DeleteBackup(2));
CloseRestoreDB();
}
// in last iteration, put smaller amount of data,
// so that backups can share sst files
int fill_up_to = std::min(keys_iteration * (i + 1), max_key);
FillDB(db_.get(), keys_iteration * i, fill_up_to);
// we should get consistent results with flush_before_backup
// set to both true and false
ASSERT_OK(db_->CreateNewBackup(!!(rnd.Next() % 2)));
}
// close and destroy
CloseBackupableDB();
DestroyDB(dbname_, Options());
// ---- make sure it's empty ----
DB* db = OpenDB();
AssertEmpty(db, 0, max_key);
delete db;
// ---- restore every backup and verify all the data is there ----
OpenRestoreDB();
for (int i = 1; i <= 5; ++i) {
if (i == 2) {
// we deleted backup 2
Status s = restore_db_->RestoreDBFromBackup(2, dbname_, dbname_);
ASSERT_TRUE(!s.ok());
} else {
int fill_up_to = std::min(keys_iteration * i, max_key);
AssertBackupConsistency(i, 0, fill_up_to, max_key);
}
}
// delete some backups -- this should leave only backups 3 and 5 alive
ASSERT_OK(restore_db_->DeleteBackup(4));
ASSERT_OK(restore_db_->PurgeOldBackups(2));
std::vector<BackupInfo> backup_info;
restore_db_->GetBackupInfo(&backup_info);
ASSERT_EQ(2UL, backup_info.size());
// check backup 3
AssertBackupConsistency(3, 0, 3 * keys_iteration, max_key);
// check backup 5
AssertBackupConsistency(5, 0, max_key);
CloseRestoreDB();
}
TEST(BackupableDBTest, DeleteNewerBackups) {
// create backups 1, 2, 3, 4, 5
OpenBackupableDB(true);
for (int i = 0; i < 5; ++i) {
FillDB(db_.get(), 100 * i, 100 * (i + 1));
ASSERT_OK(db_->CreateNewBackup(!!(i % 2)));
}
CloseBackupableDB();
// backup 3 is fine
AssertBackupConsistency(3, 0, 300, 500);
// this should delete backups 4 and 5
OpenBackupableDB();
CloseBackupableDB();
// backups 4 and 5 don't exist
OpenRestoreDB();
Status s = restore_db_->RestoreDBFromBackup(4, dbname_, dbname_);
ASSERT_TRUE(s.IsNotFound());
s = restore_db_->RestoreDBFromBackup(5, dbname_, dbname_);
ASSERT_TRUE(s.IsNotFound());
CloseRestoreDB();
}
} // anon namespace
} // namespace rocksdb
int main(int argc, char** argv) {
return rocksdb::test::RunAllTests();
}

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utilities/merge_operators/.DS_Store vendored
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7
utilities/merge_operators/string_append/stringappend_test.cc
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@ -41,9 +41,7 @@ std::shared_ptr<DB> OpenTtlDb(char delim_char) {
Options options;
options.create_if_missing = true;
options.merge_operator.reset(new StringAppendTESTOperator(delim_char));
Status s;
db = new DBWithTTL(123456, options, kDbName, s, false);
ASSERT_OK(s);
ASSERT_OK(UtilityDB::OpenTtlDB(options, kDbName, &db, 123456));
return std::shared_ptr<DB>(db);
}
@ -53,6 +51,7 @@ class StringLists {
public:
//Constructor: specifies the rocksdb db
/* implicit */
StringLists(std::shared_ptr<DB> db)
: db_(db),
merge_option_(),
@ -75,7 +74,7 @@ class StringLists {
// Returns the list of strings associated with key (or "" if does not exist)
bool Get(const std::string& key, std::string* const result){
assert(result != NULL); // we should have a place to store the result
assert(result != nullptr); // we should have a place to store the result
auto s = db_->Get(get_option_, key, result);
if (s.ok()) {

147
utilities/ttl/db_ttl.cc
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@ -10,40 +10,27 @@
namespace rocksdb {
// Open the db inside DBWithTTL because options needs pointer to its ttl
DBWithTTL::DBWithTTL(const int32_t ttl,
const Options& options,
const std::string& dbname,
Status& st,
bool read_only)
: StackableDB(nullptr) {
Options options_to_open = options;
if (options.compaction_filter) {
ttl_comp_filter_.reset(
new TtlCompactionFilter(ttl, options.compaction_filter));
options_to_open.compaction_filter = ttl_comp_filter_.get();
void DBWithTTL::SanitizeOptions(int32_t ttl, Options* options) {
if (options->compaction_filter) {
options->compaction_filter =
new TtlCompactionFilter(ttl, options->compaction_filter);
} else {
options_to_open.compaction_filter_factory =
std::shared_ptr<CompactionFilterFactory>(
new TtlCompactionFilterFactory(
ttl, options.compaction_filter_factory));
options->compaction_filter_factory =
std::shared_ptr<CompactionFilterFactory>(new TtlCompactionFilterFactory(
ttl, options->compaction_filter_factory));
}
if (options.merge_operator) {
options_to_open.merge_operator.reset(
new TtlMergeOperator(options.merge_operator));
}
if (read_only) {
st = DB::OpenForReadOnly(options_to_open, dbname, &db_);
} else {
st = DB::Open(options_to_open, dbname, &db_);
if (options->merge_operator) {
options->merge_operator.reset(
new TtlMergeOperator(options->merge_operator));
}
}
// Open the db inside DBWithTTL because options needs pointer to its ttl
DBWithTTL::DBWithTTL(DB* db) : StackableDB(db) {}
DBWithTTL::~DBWithTTL() {
delete db_;
delete GetOptions().compaction_filter;
}
Status UtilityDB::OpenTtlDB(
@ -53,9 +40,19 @@ Status UtilityDB::OpenTtlDB(
int32_t ttl,
bool read_only) {
Status st;
*dbptr = new DBWithTTL(ttl, options, dbname, st, read_only);
if (!st.ok()) {
delete *dbptr;
Options options_to_open = options;
DBWithTTL::SanitizeOptions(ttl, &options_to_open);
DB* db;
if (read_only) {
st = DB::OpenForReadOnly(options_to_open, dbname, &db);
} else {
st = DB::Open(options_to_open, dbname, &db);
}
if (st.ok()) {
*dbptr = new DBWithTTL(db);
} else {
delete db;
}
return st;
}
@ -122,10 +119,8 @@ Status DBWithTTL::StripTS(std::string* str) {
return st;
}
Status DBWithTTL::Put(
const WriteOptions& opt,
const Slice& key,
const Slice& val) {
Status DBWithTTL::Put(const WriteOptions& opt, const Slice& key,
const Slice& val) {
WriteBatch batch;
batch.Put(key, val);
return Write(opt, &batch);
@ -166,10 +161,6 @@ bool DBWithTTL::KeyMayExist(const ReadOptions& options,
return ret;
}
Status DBWithTTL::Delete(const WriteOptions& wopts, const Slice& key) {
return db_->Delete(wopts, key);
}
Status DBWithTTL::Merge(const WriteOptions& opt,
const Slice& key,
const Slice& value) {
@ -221,86 +212,6 @@ Iterator* DBWithTTL::NewIterator(const ReadOptions& opts) {
return new TtlIterator(db_->NewIterator(opts));
}
const Snapshot* DBWithTTL::GetSnapshot() {
return db_->GetSnapshot();
}
void DBWithTTL::ReleaseSnapshot(const Snapshot* snapshot) {
db_->ReleaseSnapshot(snapshot);
}
bool DBWithTTL::GetProperty(const Slice& property, std::string* value) {
return db_->GetProperty(property, value);
}
void DBWithTTL::GetApproximateSizes(const Range* r, int n, uint64_t* sizes) {
db_->GetApproximateSizes(r, n, sizes);
}
void DBWithTTL::CompactRange(const Slice* begin, const Slice* end,
bool reduce_level, int target_level) {
db_->CompactRange(begin, end, reduce_level, target_level);
}
int DBWithTTL::NumberLevels() {
return db_->NumberLevels();
}
int DBWithTTL::MaxMemCompactionLevel() {
return db_->MaxMemCompactionLevel();
}
int DBWithTTL::Level0StopWriteTrigger() {
return db_->Level0StopWriteTrigger();
}
Env* DBWithTTL::GetEnv() const {
return db_->GetEnv();
}
const Options& DBWithTTL::GetOptions() const {
return db_->GetOptions();
}
Status DBWithTTL::Flush(const FlushOptions& fopts) {
return db_->Flush(fopts);
}
Status DBWithTTL::DisableFileDeletions() {
return db_->DisableFileDeletions();
}
Status DBWithTTL::EnableFileDeletions() {
return db_->EnableFileDeletions();
}
Status DBWithTTL::GetLiveFiles(std::vector<std::string>& vec, uint64_t* mfs,
bool flush_memtable) {
return db_->GetLiveFiles(vec, mfs, flush_memtable);
}
SequenceNumber DBWithTTL::GetLatestSequenceNumber() const {
return db_->GetLatestSequenceNumber();
}
Status DBWithTTL::GetSortedWalFiles(VectorLogPtr& files) {
return db_->GetSortedWalFiles(files);
}
Status DBWithTTL::DeleteFile(std::string name) {
return db_->DeleteFile(name);
}
Status DBWithTTL::GetDbIdentity(std::string& identity) {
return db_->GetDbIdentity(identity);
}
Status DBWithTTL::GetUpdatesSince(
SequenceNumber seq_number,
unique_ptr<TransactionLogIterator>* iter) {
return db_->GetUpdatesSince(seq_number, iter);
}
void DBWithTTL::TEST_Destroy_DBWithTtl() {
((DBImpl*) db_)->TEST_Destroy_DBImpl();
}

81
utilities/ttl/db_ttl.h
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@ -14,82 +14,33 @@ namespace rocksdb {
class DBWithTTL : public StackableDB {
public:
DBWithTTL(const int32_t ttl,
const Options& options,
const std::string& dbname,
Status& st,
bool read_only);
static void SanitizeOptions(int32_t ttl, Options* options);
explicit DBWithTTL(DB* db);
virtual ~DBWithTTL();
virtual Status Put(const WriteOptions& o,
const Slice& key,
const Slice& val);
virtual Status Put(const WriteOptions& o, const Slice& key,
const Slice& val) override;
virtual Status Get(const ReadOptions& options,
const Slice& key,
std::string* value);
virtual Status Get(const ReadOptions& options, const Slice& key,
std::string* value) override;
virtual std::vector<Status> MultiGet(const ReadOptions& options,
const std::vector<Slice>& keys,
std::vector<std::string>* values);
virtual std::vector<Status> MultiGet(
const ReadOptions& options, const std::vector<Slice>& keys,
std::vector<std::string>* values) override;
virtual bool KeyMayExist(const ReadOptions& options,
const Slice& key,
std::string* value,
bool* value_found = nullptr) override;
virtual Status Delete(const WriteOptions& wopts, const Slice& key);
virtual Status Merge(const WriteOptions& options, const Slice& key,
const Slice& value) override;
virtual Status Merge(const WriteOptions& options,
const Slice& key,
const Slice& value);
virtual Status Write(const WriteOptions& opts, WriteBatch* updates) override;
virtual Status Write(const WriteOptions& opts, WriteBatch* updates);
virtual Iterator* NewIterator(const ReadOptions& opts);
virtual const Snapshot* GetSnapshot();
virtual void ReleaseSnapshot(const Snapshot* snapshot);
virtual bool GetProperty(const Slice& property, std::string* value);
virtual void GetApproximateSizes(const Range* r, int n, uint64_t* sizes);
virtual void CompactRange(const Slice* begin, const Slice* end,
bool reduce_level = false, int target_level = -1);
virtual int NumberLevels();
virtual int MaxMemCompactionLevel();
virtual int Level0StopWriteTrigger();
virtual Env* GetEnv() const;
virtual const Options& GetOptions() const;
virtual Status Flush(const FlushOptions& fopts);
virtual Status DisableFileDeletions();
virtual Status EnableFileDeletions();
virtual Status GetLiveFiles(std::vector<std::string>& vec, uint64_t* mfs,
bool flush_memtable = true);
virtual Status GetSortedWalFiles(VectorLogPtr& files);
virtual Status DeleteFile(std::string name);
virtual Status GetDbIdentity(std::string& identity);
virtual SequenceNumber GetLatestSequenceNumber() const;
virtual Status GetUpdatesSince(SequenceNumber seq_number,
unique_ptr<TransactionLogIterator>* iter);
virtual Iterator* NewIterator(const ReadOptions& opts) override;
// Simulate a db crash, no elegant closing of database.
void TEST_Destroy_DBWithTtl();
@ -113,10 +64,6 @@ class DBWithTTL : public StackableDB {
static const int32_t kMinTimestamp = 1368146402; // 05/09/2013:5:40PM GMT-8
static const int32_t kMaxTimestamp = 2147483647; // 01/18/2038:7:14PM GMT-8
private:
DB* db_;
unique_ptr<CompactionFilter> ttl_comp_filter_;
};
class TtlIterator : public Iterator {