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Persistent Stats: persist stats history to disk (#5046) 

Summary:
This PR continues the work in https://github.com/facebook/rocksdb/pull/4748 and https://github.com/facebook/rocksdb/pull/4535 by adding a new DBOption `persist_stats_to_disk` which instructs RocksDB to persist stats history to RocksDB itself. When statistics is enabled, and  both options `stats_persist_period_sec` and `persist_stats_to_disk` are set, RocksDB will periodically write stats to a built-in column family in the following form: key -> (timestamp in microseconds)#(stats name), value -> stats value. The existing API `GetStatsHistory` will detect the current value of `persist_stats_to_disk` and either read from in-memory data structure or from the hidden column family on disk.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5046

Differential Revision: D15863138

Pulled By: miasantreble

fbshipit-source-id: bb82abdb3f2ca581aa42531734ac799f113e931b
This commit is contained in:
Zhongyi Xie 2019-06-17 15:17:43 -07:00 committed by Facebook Github Bot
parent ee294c24ed
commit 671d15cbdd
25 changed files with 1143 additions and 332 deletions
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4
CMakeLists.txt
View File

@ -521,7 +521,6 @@ set(SOURCES
db/flush_scheduler.cc
db/forward_iterator.cc
db/internal_stats.cc
db/in_memory_stats_history.cc
db/logs_with_prep_tracker.cc
db/log_reader.cc
db/log_writer.cc
@ -568,10 +567,12 @@ set(SOURCES
memtable/write_buffer_manager.cc
monitoring/histogram.cc
monitoring/histogram_windowing.cc
monitoring/in_memory_stats_history.cc
monitoring/instrumented_mutex.cc
monitoring/iostats_context.cc
monitoring/perf_context.cc
monitoring/perf_level.cc
monitoring/persistent_stats_history.cc
monitoring/statistics.cc
monitoring/thread_status_impl.cc
monitoring/thread_status_updater.cc
@ -955,6 +956,7 @@ if(WITH_TESTS)
monitoring/histogram_test.cc
monitoring/iostats_context_test.cc
monitoring/statistics_test.cc
monitoring/stats_history_test.cc
options/options_settable_test.cc
options/options_test.cc
table/block_based/block_based_filter_block_test.cc

4
Makefile
View File

@ -548,6 +548,7 @@ TESTS = \
ldb_cmd_test \
persistent_cache_test \
statistics_test \
stats_history_test \
lru_cache_test \
object_registry_test \
repair_test \
@ -1566,6 +1567,9 @@ persistent_cache_test: utilities/persistent_cache/persistent_cache_test.o db/db
statistics_test: monitoring/statistics_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(AM_LINK)
stats_history_test: monitoring/stats_history_test.o db/db_test_util.o $(LIBOBJECTS) $(TESTHARNESS)
$(AM_LINK)
lru_cache_test: cache/lru_cache_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(AM_LINK)

8
TARGETS
View File

@ -113,7 +113,6 @@ cpp_library(
"db/flush_job.cc",
"db/flush_scheduler.cc",
"db/forward_iterator.cc",
"db/in_memory_stats_history.cc",
"db/internal_stats.cc",
"db/log_reader.cc",
"db/log_writer.cc",
@ -163,10 +162,12 @@ cpp_library(
"memtable/write_buffer_manager.cc",
"monitoring/histogram.cc",
"monitoring/histogram_windowing.cc",
"monitoring/in_memory_stats_history.cc",
"monitoring/instrumented_mutex.cc",
"monitoring/iostats_context.cc",
"monitoring/perf_context.cc",
"monitoring/perf_level.cc",
"monitoring/persistent_stats_history.cc",
"monitoring/statistics.cc",
"monitoring/thread_status_impl.cc",
"monitoring/thread_status_updater.cc",
@ -971,6 +972,11 @@ ROCKS_TESTS = [
"monitoring/statistics_test.cc",
"serial",
],
[
"stats_history_test",
"monitoring/stats_history_test.cc",
"serial",
],
[
"stringappend_test",
"utilities/merge_operators/string_append/stringappend_test.cc",

79
db/db_impl/db_impl.cc
View File

@ -34,7 +34,6 @@
#include "db/external_sst_file_ingestion_job.h"
#include "db/flush_job.h"
#include "db/forward_iterator.h"
#include "db/in_memory_stats_history.h"
#include "db/job_context.h"
#include "db/log_reader.h"
#include "db/log_writer.h"
@ -58,8 +57,10 @@
#include "logging/logging.h"
#include "memtable/hash_linklist_rep.h"
#include "memtable/hash_skiplist_rep.h"
#include "monitoring/in_memory_stats_history.h"
#include "monitoring/iostats_context_imp.h"
#include "monitoring/perf_context_imp.h"
#include "monitoring/persistent_stats_history.h"
#include "monitoring/thread_status_updater.h"
#include "monitoring/thread_status_util.h"
#include "options/cf_options.h"
@ -98,6 +99,9 @@
namespace rocksdb {
const std::string kDefaultColumnFamilyName("default");
const std::string kPersistentStatsColumnFamilyName(
"___rocksdb_stats_history___");
const int kMicrosInSecond = 1000 * 1000;
void DumpRocksDBBuildVersion(Logger* log);
CompressionType GetCompressionFlush(
@ -162,6 +166,7 @@ DBImpl::DBImpl(const DBOptions& options, const std::string& dbname,
logfile_number_(0),
log_dir_synced_(false),
log_empty_(true),
persist_stats_cf_handle_(nullptr),
log_sync_cv_(&mutex_),
total_log_size_(0),
is_snapshot_supported_(true),
@ -482,10 +487,17 @@ Status DBImpl::CloseHelper() {
}
}
if (default_cf_handle_ != nullptr) {
if (default_cf_handle_ != nullptr || persist_stats_cf_handle_ != nullptr) {
// we need to delete handle outside of lock because it does its own locking
mutex_.Unlock();
if (default_cf_handle_) {
delete default_cf_handle_;
default_cf_handle_ = nullptr;
}
if (persist_stats_cf_handle_) {
delete persist_stats_cf_handle_;
persist_stats_cf_handle_ = nullptr;
}
mutex_.Lock();
}
@ -634,7 +646,7 @@ void DBImpl::StartTimedTasks() {
if (!thread_dump_stats_) {
thread_dump_stats_.reset(new rocksdb::RepeatableThread(
[this]() { DBImpl::DumpStats(); }, "dump_st", env_,
stats_dump_period_sec * 1000000));
static_cast<uint64_t>(stats_dump_period_sec) * kMicrosInSecond));
}
}
stats_persist_period_sec = mutable_db_options_.stats_persist_period_sec;
@ -642,14 +654,14 @@ void DBImpl::StartTimedTasks() {
if (!thread_persist_stats_) {
thread_persist_stats_.reset(new rocksdb::RepeatableThread(
[this]() { DBImpl::PersistStats(); }, "pst_st", env_,
stats_persist_period_sec * 1000000));
static_cast<uint64_t>(stats_persist_period_sec) * kMicrosInSecond));
}
}
}
}
// esitmate the total size of stats_history_
size_t DBImpl::EstiamteStatsHistorySize() const {
size_t DBImpl::EstimateInMemoryStatsHistorySize() const {
size_t size_total =
sizeof(std::map<uint64_t, std::map<std::string, uint64_t>>);
if (stats_history_.size() == 0) return size_total;
@ -671,7 +683,7 @@ void DBImpl::PersistStats() {
if (shutdown_initiated_) {
return;
}
uint64_t now_micros = env_->NowMicros();
uint64_t now_seconds = env_->NowMicros() / kMicrosInSecond;
Statistics* statistics = immutable_db_options_.statistics.get();
if (!statistics) {
return;
@ -682,12 +694,40 @@ void DBImpl::PersistStats() {
stats_history_size_limit = mutable_db_options_.stats_history_buffer_size;
}
// TODO(Zhongyi): also persist immutable_db_options_.statistics
{
std::map<std::string, uint64_t> stats_map;
if (!statistics->getTickerMap(&stats_map)) {
return;
}
if (immutable_db_options_.persist_stats_to_disk) {
WriteBatch batch;
if (stats_slice_initialized_) {
for (const auto& stat : stats_map) {
char key[100];
int length =
EncodePersistentStatsKey(now_seconds, stat.first, 100, key);
// calculate the delta from last time
if (stats_slice_.find(stat.first) != stats_slice_.end()) {
uint64_t delta = stat.second - stats_slice_[stat.first];
batch.Put(persist_stats_cf_handle_, Slice(key, std::min(100, length)),
ToString(delta));
}
}
}
stats_slice_initialized_ = true;
std::swap(stats_slice_, stats_map);
WriteOptions wo;
wo.low_pri = true;
wo.no_slowdown = true;
wo.sync = false;
Status s = Write(wo, &batch);
if (!s.ok()) {
ROCKS_LOG_INFO(immutable_db_options_.info_log,
"Writing to persistent stats CF failed -- %s\n",
s.ToString().c_str());
}
// TODO(Zhongyi): add purging for persisted data
} else {
InstrumentedMutexLock l(&stats_history_mutex_);
// calculate the delta from last time
if (stats_slice_initialized_) {
@ -697,17 +737,19 @@ void DBImpl::PersistStats() {
stats_delta[stat.first] = stat.second - stats_slice_[stat.first];
}
}
stats_history_[now_micros] = stats_delta;
stats_history_[now_seconds] = stats_delta;
}
stats_slice_initialized_ = true;
std::swap(stats_slice_, stats_map);
TEST_SYNC_POINT("DBImpl::PersistStats:StatsCopied");
// delete older stats snapshots to control memory consumption
bool purge_needed = EstiamteStatsHistorySize() > stats_history_size_limit;
bool purge_needed =
EstimateInMemoryStatsHistorySize() > stats_history_size_limit;
while (purge_needed && !stats_history_.empty()) {
stats_history_.erase(stats_history_.begin());
purge_needed = EstiamteStatsHistorySize() > stats_history_size_limit;
purge_needed =
EstimateInMemoryStatsHistorySize() > stats_history_size_limit;
}
}
// TODO: persist stats to disk
@ -741,8 +783,13 @@ Status DBImpl::GetStatsHistory(
if (!stats_iterator) {
return Status::InvalidArgument("stats_iterator not preallocated.");
}
if (immutable_db_options_.persist_stats_to_disk) {
stats_iterator->reset(
new PersistentStatsHistoryIterator(start_time, end_time, this));
} else {
stats_iterator->reset(
new InMemoryStatsHistoryIterator(start_time, end_time, this));
}
return (*stats_iterator)->status();
}
@ -946,7 +993,8 @@ Status DBImpl::SetDBOptions(
if (new_options.stats_dump_period_sec > 0) {
thread_dump_stats_.reset(new rocksdb::RepeatableThread(
[this]() { DBImpl::DumpStats(); }, "dump_st", env_,
new_options.stats_dump_period_sec * 1000000));
static_cast<uint64_t>(new_options.stats_dump_period_sec) *
kMicrosInSecond));
} else {
thread_dump_stats_.reset();
}
@ -961,7 +1009,8 @@ Status DBImpl::SetDBOptions(
if (new_options.stats_persist_period_sec > 0) {
thread_persist_stats_.reset(new rocksdb::RepeatableThread(
[this]() { DBImpl::PersistStats(); }, "pst_st", env_,
new_options.stats_persist_period_sec * 1000000));
static_cast<uint64_t>(new_options.stats_persist_period_sec) *
kMicrosInSecond));
} else {
thread_persist_stats_.reset();
}
@ -1373,6 +1422,10 @@ ColumnFamilyHandle* DBImpl::DefaultColumnFamily() const {
return default_cf_handle_;
}
ColumnFamilyHandle* DBImpl::PersistentStatsColumnFamily() const {
return persist_stats_cf_handle_;
}
Status DBImpl::Get(const ReadOptions& read_options,
ColumnFamilyHandle* column_family, const Slice& key,
PinnableSlice* value) {

26
db/db_impl/db_impl.h
View File

@ -66,6 +66,7 @@ class Arena;
class ArenaWrappedDBIter;
class InMemoryStatsHistoryIterator;
class MemTable;
class PersistentStatsHistoryIterator;
class TableCache;
class TaskLimiterToken;
class Version;
@ -268,6 +269,8 @@ class DBImpl : public DB {
ColumnFamilyHandle* DefaultColumnFamily() const override;
ColumnFamilyHandle* PersistentStatsColumnFamily() const;
virtual Status Close() override;
Status GetStatsHistory(
@ -822,7 +825,7 @@ class DBImpl : public DB {
void TEST_WaitForDumpStatsRun(std::function<void()> callback) const;
void TEST_WaitForPersistStatsRun(std::function<void()> callback) const;
bool TEST_IsPersistentStatsEnabled() const;
size_t TEST_EstiamteStatsHistorySize() const;
size_t TEST_EstimateInMemoryStatsHistorySize() const;
#endif // NDEBUG
@ -1016,6 +1019,7 @@ class DBImpl : public DB {
friend class DBTest_MixedSlowdownOptionsStop_Test;
friend class DBCompactionTest_CompactBottomLevelFilesWithDeletions_Test;
friend class DBCompactionTest_CompactionDuringShutdown_Test;
friend class StatsHistoryTest_PersistentStatsCreateColumnFamilies_Test;
#ifndef NDEBUG
friend class DBTest2_ReadCallbackTest_Test;
friend class WriteCallbackTest_WriteWithCallbackTest_Test;
@ -1176,6 +1180,21 @@ class DBImpl : public DB {
PrepickedCompaction* prepicked_compaction;
};
// Initialize the built-in column family for persistent stats. Depending on
// whether on-disk persistent stats have been enabled before, it may either
// create a new column family and column family handle or just a column family
// handle.
// Required: DB mutex held
Status InitPersistStatsColumnFamily();
// Persistent Stats column family has two format version key which are used
// for compatibility check. Write format version if it's created for the
// first time, read format version and check compatibility if recovering
// from disk. This function requires DB mutex held at entrance but may
// release and re-acquire DB mutex in the process.
// Required: DB mutex held
Status PersistentStatsProcessFormatVersion();
Status ResumeImpl();
void MaybeIgnoreError(Status* s) const;
@ -1424,7 +1443,7 @@ class DBImpl : public DB {
void PrintStatistics();
size_t EstiamteStatsHistorySize() const;
size_t EstimateInMemoryStatsHistorySize() const;
// persist stats to column family "_persistent_stats"
void PersistStats();
@ -1571,6 +1590,9 @@ class DBImpl : public DB {
// expesnive mutex_ lock during WAL write, which update log_empty_.
bool log_empty_;
ColumnFamilyHandleImpl* persist_stats_cf_handle_;
bool persistent_stats_cfd_exists_ = true;
// Without two_write_queues, read and writes to alive_log_files_ are
// protected by mutex_. However since back() is never popped, and push_back()

4
db/db_impl/db_impl_debug.cc
View File

@ -262,8 +262,8 @@ bool DBImpl::TEST_IsPersistentStatsEnabled() const {
return thread_persist_stats_ && thread_persist_stats_->IsRunning();
}
size_t DBImpl::TEST_EstiamteStatsHistorySize() const {
return EstiamteStatsHistorySize();
size_t DBImpl::TEST_EstimateInMemoryStatsHistorySize() const {
return EstimateInMemoryStatsHistorySize();
}
} // namespace rocksdb
#endif // NDEBUG

115
db/db_impl/db_impl_open.cc
View File

@ -13,6 +13,7 @@
#include "db/builder.h"
#include "db/error_handler.h"
#include "file/sst_file_manager_impl.h"
#include "monitoring/persistent_stats_history.h"
#include "options/options_helper.h"
#include "rocksdb/wal_filter.h"
#include "table/block_based/block_based_table_factory.h"
@ -375,6 +376,7 @@ Status DBImpl::Recover(
}
Status s = versions_->Recover(column_families, read_only);
if (immutable_db_options_.paranoid_checks && s.ok()) {
s = CheckConsistency();
}
@ -386,6 +388,10 @@ Status DBImpl::Recover(
}
}
}
// DB mutex is already held
if (s.ok() && immutable_db_options_.persist_stats_to_disk) {
s = InitPersistStatsColumnFamily();
}
// Initial max_total_in_memory_state_ before recovery logs. Log recovery
// may check this value to decide whether to flush.
@ -401,6 +407,8 @@ Status DBImpl::Recover(
default_cf_handle_ = new ColumnFamilyHandleImpl(
versions_->GetColumnFamilySet()->GetDefault(), this, &mutex_);
default_cf_internal_stats_ = default_cf_handle_->cfd()->internal_stats();
// TODO(Zhongyi): handle single_column_family_mode_ when
// persistent_stats is enabled
single_column_family_mode_ =
versions_->GetColumnFamilySet()->NumberOfColumnFamilies() == 1;
@ -496,6 +504,98 @@ Status DBImpl::Recover(
return s;
}
Status DBImpl::PersistentStatsProcessFormatVersion() {
mutex_.AssertHeld();
Status s;
// persist version when stats CF doesn't exist
bool should_persist_format_version = !persistent_stats_cfd_exists_;
mutex_.Unlock();
if (persistent_stats_cfd_exists_) {
// Check persistent stats format version compatibility. Drop and recreate
// persistent stats CF if format version is incompatible
uint64_t format_version_recovered = 0;
Status s_format = DecodePersistentStatsVersionNumber(
this, StatsVersionKeyType::kFormatVersion, &format_version_recovered);
uint64_t compatible_version_recovered = 0;
Status s_compatible = DecodePersistentStatsVersionNumber(
this, StatsVersionKeyType::kCompatibleVersion,
&compatible_version_recovered);
// abort reading from existing stats CF if any of following is true:
// 1. failed to read format version or compatible version from disk
// 2. sst's format version is greater than current format version, meaning
// this sst is encoded with a newer RocksDB release, and current compatible
// version is below the sst's compatible version
if (!s_format.ok() || !s_compatible.ok() ||
(kStatsCFCurrentFormatVersion < format_version_recovered &&
kStatsCFCompatibleFormatVersion < compatible_version_recovered)) {
if (!s_format.ok() || !s_compatible.ok()) {
ROCKS_LOG_INFO(
immutable_db_options_.info_log,
"Reading persistent stats version key failed. Format key: %s, "
"compatible key: %s",
s_format.ToString().c_str(), s_compatible.ToString().c_str());
} else {
ROCKS_LOG_INFO(
immutable_db_options_.info_log,
"Disable persistent stats due to corrupted or incompatible format "
"version\n");
}
DropColumnFamily(persist_stats_cf_handle_);
DestroyColumnFamilyHandle(persist_stats_cf_handle_);
ColumnFamilyHandle* handle = nullptr;
ColumnFamilyOptions cfo;
OptimizeForPersistentStats(&cfo);
s = CreateColumnFamily(cfo, kPersistentStatsColumnFamilyName, &handle);
persist_stats_cf_handle_ = static_cast<ColumnFamilyHandleImpl*>(handle);
// should also persist version here because old stats CF is discarded
should_persist_format_version = true;
}
}
if (s.ok() && should_persist_format_version) {
// Persistent stats CF being created for the first time, need to write
// format version key
WriteBatch batch;
batch.Put(persist_stats_cf_handle_, kFormatVersionKeyString,
ToString(kStatsCFCurrentFormatVersion));
batch.Put(persist_stats_cf_handle_, kCompatibleVersionKeyString,
ToString(kStatsCFCompatibleFormatVersion));
WriteOptions wo;
wo.low_pri = true;
wo.no_slowdown = true;
wo.sync = false;
s = Write(wo, &batch);
}
mutex_.Lock();
return s;
}
Status DBImpl::InitPersistStatsColumnFamily() {
mutex_.AssertHeld();
assert(!persist_stats_cf_handle_);
ColumnFamilyData* persistent_stats_cfd =
versions_->GetColumnFamilySet()->GetColumnFamily(
kPersistentStatsColumnFamilyName);
persistent_stats_cfd_exists_ = persistent_stats_cfd != nullptr;
Status s;
if (persistent_stats_cfd != nullptr) {
// We are recovering from a DB which already contains persistent stats CF,
// the CF is already created in VersionSet::ApplyOneVersionEdit, but
// column family handle was not. Need to explicitly create handle here.
persist_stats_cf_handle_ =
new ColumnFamilyHandleImpl(persistent_stats_cfd, this, &mutex_);
} else {
mutex_.Unlock();
ColumnFamilyHandle* handle = nullptr;
ColumnFamilyOptions cfo;
OptimizeForPersistentStats(&cfo);
s = CreateColumnFamily(cfo, kPersistentStatsColumnFamilyName, &handle);
persist_stats_cf_handle_ = static_cast<ColumnFamilyHandleImpl*>(handle);
mutex_.Lock();
}
return s;
}
// REQUIRES: log_numbers are sorted in ascending order
Status DBImpl::RecoverLogFiles(const std::vector<uint64_t>& log_numbers,
SequenceNumber* next_sequence, bool read_only) {
@ -1065,12 +1165,23 @@ Status DB::Open(const Options& options, const std::string& dbname, DB** dbptr) {
std::vector<ColumnFamilyDescriptor> column_families;
column_families.push_back(
ColumnFamilyDescriptor(kDefaultColumnFamilyName, cf_options));
if (db_options.persist_stats_to_disk) {
column_families.push_back(
ColumnFamilyDescriptor(kPersistentStatsColumnFamilyName, cf_options));
}
std::vector<ColumnFamilyHandle*> handles;
Status s = DB::Open(db_options, dbname, column_families, &handles, dbptr);
if (s.ok()) {
if (db_options.persist_stats_to_disk) {
assert(handles.size() == 2);
} else {
assert(handles.size() == 1);
}
// i can delete the handle since DBImpl is always holding a reference to
// default column family
if (db_options.persist_stats_to_disk && handles[1] != nullptr) {
delete handles[1];
}
delete handles[0];
}
return s;
@ -1247,6 +1358,10 @@ Status DBImpl::Open(const DBOptions& db_options, const std::string& dbname,
s = impl->directories_.GetDbDir()->Fsync();
}
}
if (s.ok() && impl->immutable_db_options_.persist_stats_to_disk) {
// try to read format version but no need to fail Open() even if it fails
s = impl->PersistentStatsProcessFormatVersion();
}
if (s.ok()) {
for (auto cfd : *impl->versions_->GetColumnFamilySet()) {

265
db/db_options_test.cc
View File

@ -518,114 +518,6 @@ TEST_F(DBOptionsTest, SetStatsDumpPeriodSec) {
Close();
}
TEST_F(DBOptionsTest, RunStatsDumpPeriodSec) {
Options options;
options.create_if_missing = true;
options.stats_dump_period_sec = 5;
std::unique_ptr<rocksdb::MockTimeEnv> mock_env;
mock_env.reset(new rocksdb::MockTimeEnv(env_));
mock_env->set_current_time(0); // in seconds
options.env = mock_env.get();
int counter = 0;
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
#if defined(OS_MACOSX) && !defined(NDEBUG)
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"InstrumentedCondVar::TimedWaitInternal", [&](void* arg) {
uint64_t time_us = *reinterpret_cast<uint64_t*>(arg);
if (time_us < mock_env->RealNowMicros()) {
*reinterpret_cast<uint64_t*>(arg) = mock_env->RealNowMicros() + 1000;
}
});
#endif // OS_MACOSX && !NDEBUG
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::DumpStats:1", [&](void* /*arg*/) {
counter++;
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
Reopen(options);
ASSERT_EQ(5, dbfull()->GetDBOptions().stats_dump_period_sec);
dbfull()->TEST_WaitForDumpStatsRun([&] { mock_env->set_current_time(5); });
ASSERT_GE(counter, 1);
// Test cacel job through SetOptions
ASSERT_OK(dbfull()->SetDBOptions({{"stats_dump_period_sec", "0"}}));
int old_val = counter;
for (int i = 6; i < 20; ++i) {
dbfull()->TEST_WaitForDumpStatsRun([&] { mock_env->set_current_time(i); });
}
ASSERT_EQ(counter, old_val);
Close();
}
// Test persistent stats background thread scheduling and cancelling
TEST_F(DBOptionsTest, StatsPersistScheduling) {
Options options;
options.create_if_missing = true;
options.stats_persist_period_sec = 5;
std::unique_ptr<rocksdb::MockTimeEnv> mock_env;
mock_env.reset(new rocksdb::MockTimeEnv(env_));
mock_env->set_current_time(0); // in seconds
options.env = mock_env.get();
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
#if defined(OS_MACOSX) && !defined(NDEBUG)
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"InstrumentedCondVar::TimedWaitInternal", [&](void* arg) {
uint64_t time_us = *reinterpret_cast<uint64_t*>(arg);
if (time_us < mock_env->RealNowMicros()) {
*reinterpret_cast<uint64_t*>(arg) = mock_env->RealNowMicros() + 1000;
}
});
#endif // OS_MACOSX && !NDEBUG
int counter = 0;
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::PersistStats:Entry", [&](void* /*arg*/) { counter++; });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
Reopen(options);
ASSERT_EQ(5, dbfull()->GetDBOptions().stats_persist_period_sec);
dbfull()->TEST_WaitForPersistStatsRun([&] { mock_env->set_current_time(5); });
ASSERT_GE(counter, 1);
// Test cacel job through SetOptions
ASSERT_TRUE(dbfull()->TEST_IsPersistentStatsEnabled());
ASSERT_OK(dbfull()->SetDBOptions({{"stats_persist_period_sec", "0"}}));
ASSERT_FALSE(dbfull()->TEST_IsPersistentStatsEnabled());
Close();
}
// Test enabling persistent stats for the first time
TEST_F(DBOptionsTest, PersistentStatsFreshInstall) {
Options options;
options.create_if_missing = true;
options.stats_persist_period_sec = 0;
std::unique_ptr<rocksdb::MockTimeEnv> mock_env;
mock_env.reset(new rocksdb::MockTimeEnv(env_));
mock_env->set_current_time(0); // in seconds
options.env = mock_env.get();
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
#if defined(OS_MACOSX) && !defined(NDEBUG)
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"InstrumentedCondVar::TimedWaitInternal", [&](void* arg) {
uint64_t time_us = *reinterpret_cast<uint64_t*>(arg);
if (time_us < mock_env->RealNowMicros()) {
*reinterpret_cast<uint64_t*>(arg) = mock_env->RealNowMicros() + 1000;
}
});
#endif // OS_MACOSX && !NDEBUG
int counter = 0;
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::PersistStats:Entry", [&](void* /*arg*/) { counter++; });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
Reopen(options);
ASSERT_OK(dbfull()->SetDBOptions({{"stats_persist_period_sec", "5"}}));
ASSERT_EQ(5, dbfull()->GetDBOptions().stats_persist_period_sec);
dbfull()->TEST_WaitForPersistStatsRun([&] { mock_env->set_current_time(5); });
ASSERT_GE(counter, 1);
Close();
}
TEST_F(DBOptionsTest, SetOptionsStatsPersistPeriodSec) {
Options options;
options.create_if_missing = true;
@ -640,163 +532,6 @@ TEST_F(DBOptionsTest, SetOptionsStatsPersistPeriodSec) {
ASSERT_EQ(12345, dbfull()->GetDBOptions().stats_persist_period_sec);
}
TEST_F(DBOptionsTest, GetStatsHistory) {
Options options;
options.create_if_missing = true;
options.stats_persist_period_sec = 5;
options.statistics = rocksdb::CreateDBStatistics();
std::unique_ptr<rocksdb::MockTimeEnv> mock_env;
mock_env.reset(new rocksdb::MockTimeEnv(env_));
mock_env->set_current_time(0); // in seconds
options.env = mock_env.get();
#if defined(OS_MACOSX) && !defined(NDEBUG)
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"InstrumentedCondVar::TimedWaitInternal", [&](void* arg) {
uint64_t time_us = *reinterpret_cast<uint64_t*>(arg);
if (time_us < mock_env->RealNowMicros()) {
*reinterpret_cast<uint64_t*>(arg) = mock_env->RealNowMicros() + 1000;
}
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
#endif // OS_MACOSX && !NDEBUG
CreateColumnFamilies({"pikachu"}, options);
ASSERT_OK(Put("foo", "bar"));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
int mock_time = 1;
// Wait for stats persist to finish
dbfull()->TEST_WaitForPersistStatsRun([&] { mock_env->set_current_time(5); });
std::unique_ptr<StatsHistoryIterator> stats_iter;
db_->GetStatsHistory(0, 6 * kMicrosInSec, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
// disabled stats snapshots
ASSERT_OK(dbfull()->SetDBOptions({{"stats_persist_period_sec", "0"}}));
size_t stats_count = 0;
for (; stats_iter->Valid(); stats_iter->Next()) {
auto stats_map = stats_iter->GetStatsMap();
stats_count += stats_map.size();
}
ASSERT_GT(stats_count, 0);
// Wait a bit and verify no more stats are found
for (mock_time = 6; mock_time < 20; ++mock_time) {
dbfull()->TEST_WaitForPersistStatsRun(
[&] { mock_env->set_current_time(mock_time); });
}
db_->GetStatsHistory(0, 20 * kMicrosInSec, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
size_t stats_count_new = 0;
for (; stats_iter->Valid(); stats_iter->Next()) {
stats_count_new += stats_iter->GetStatsMap().size();
}
ASSERT_EQ(stats_count_new, stats_count);
Close();
}
TEST_F(DBOptionsTest, InMemoryStatsHistoryPurging) {
Options options;
options.create_if_missing = true;
options.statistics = rocksdb::CreateDBStatistics();
options.stats_persist_period_sec = 1;
std::unique_ptr<rocksdb::MockTimeEnv> mock_env;
mock_env.reset(new rocksdb::MockTimeEnv(env_));
mock_env->set_current_time(0); // in seconds
options.env = mock_env.get();
#if defined(OS_MACOSX) && !defined(NDEBUG)
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"InstrumentedCondVar::TimedWaitInternal", [&](void* arg) {
uint64_t time_us = *reinterpret_cast<uint64_t*>(arg);
if (time_us < mock_env->RealNowMicros()) {
*reinterpret_cast<uint64_t*>(arg) = mock_env->RealNowMicros() + 1000;
}
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
#endif // OS_MACOSX && !NDEBUG
CreateColumnFamilies({"pikachu"}, options);
ASSERT_OK(Put("foo", "bar"));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
// some random operation to populate statistics
ASSERT_OK(Delete("foo"));
ASSERT_OK(Put("sol", "sol"));
ASSERT_OK(Put("epic", "epic"));
ASSERT_OK(Put("ltd", "ltd"));
ASSERT_EQ("sol", Get("sol"));
ASSERT_EQ("epic", Get("epic"));
ASSERT_EQ("ltd", Get("ltd"));
Iterator* iterator = db_->NewIterator(ReadOptions());
for (iterator->SeekToFirst(); iterator->Valid(); iterator->Next()) {
ASSERT_TRUE(iterator->key() == iterator->value());
}
delete iterator;
ASSERT_OK(Flush());
ASSERT_OK(Delete("sol"));
db_->CompactRange(CompactRangeOptions(), nullptr, nullptr);
int mock_time = 1;
// Wait for stats persist to finish
for (; mock_time < 5; ++mock_time) {
dbfull()->TEST_WaitForPersistStatsRun(
[&] { mock_env->set_current_time(mock_time); });
}
// second round of ops
ASSERT_OK(Put("saigon", "saigon"));
ASSERT_OK(Put("noodle talk", "noodle talk"));
ASSERT_OK(Put("ping bistro", "ping bistro"));
iterator = db_->NewIterator(ReadOptions());
for (iterator->SeekToFirst(); iterator->Valid(); iterator->Next()) {
ASSERT_TRUE(iterator->key() == iterator->value());
}
delete iterator;
ASSERT_OK(Flush());
db_->CompactRange(CompactRangeOptions(), nullptr, nullptr);
for (; mock_time < 10; ++mock_time) {
dbfull()->TEST_WaitForPersistStatsRun(
[&] { mock_env->set_current_time(mock_time); });
}
std::unique_ptr<StatsHistoryIterator> stats_iter;
db_->GetStatsHistory(0, 10 * kMicrosInSec, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
size_t stats_count = 0;
int slice_count = 0;
for (; stats_iter->Valid(); stats_iter->Next()) {
slice_count++;
auto stats_map = stats_iter->GetStatsMap();
stats_count += stats_map.size();
}
size_t stats_history_size = dbfull()->TEST_EstiamteStatsHistorySize();
ASSERT_GE(slice_count, 9);
ASSERT_GE(stats_history_size, 12000);
// capping memory cost at 12000 bytes since one slice is around 10000~12000
ASSERT_OK(dbfull()->SetDBOptions({{"stats_history_buffer_size", "12000"}}));
ASSERT_EQ(12000, dbfull()->GetDBOptions().stats_history_buffer_size);
// Wait for stats persist to finish
for (; mock_time < 20; ++mock_time) {
dbfull()->TEST_WaitForPersistStatsRun(
[&] { mock_env->set_current_time(mock_time); });
}
db_->GetStatsHistory(0, 20 * kMicrosInSec, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
size_t stats_count_reopen = 0;
slice_count = 0;
for (; stats_iter->Valid(); stats_iter->Next()) {
slice_count++;
auto stats_map = stats_iter->GetStatsMap();
stats_count_reopen += stats_map.size();
}
size_t stats_history_size_reopen = dbfull()->TEST_EstiamteStatsHistorySize();
// only one slice can fit under the new stats_history_buffer_size
ASSERT_LT(slice_count, 2);
ASSERT_TRUE(stats_history_size_reopen < 12000 &&
stats_history_size_reopen > 0);
ASSERT_TRUE(stats_count_reopen < stats_count && stats_count_reopen > 0);
Close();
}
static void assert_candidate_files_empty(DBImpl* dbfull, const bool empty) {
dbfull->TEST_LockMutex();
JobContext job_context(0);

17
db/version_set.cc
View File

@ -9,10 +9,10 @@
#include "db/version_set.h"
#include <cinttypes>
#include <stdio.h>
#include <algorithm>
#include <array>
#include <cinttypes>
#include <list>
#include <map>
#include <set>
@ -32,6 +32,7 @@
#include "file/filename.h"
#include "monitoring/file_read_sample.h"
#include "monitoring/perf_context_imp.h"
#include "monitoring/persistent_stats_history.h"
#include "rocksdb/env.h"
#include "rocksdb/merge_operator.h"
#include "rocksdb/write_buffer_manager.h"
@ -3962,11 +3963,23 @@ Status VersionSet::ApplyOneVersionEditToBuilder(
edit.column_family_name_);
}
auto cf_options = name_to_options.find(edit.column_family_name_);
if (cf_options == name_to_options.end()) {
// implicitly add persistent_stats column family without requiring user
// to specify
bool is_persistent_stats_column_family =
edit.column_family_name_.compare(kPersistentStatsColumnFamilyName) == 0;
if (cf_options == name_to_options.end() &&
!is_persistent_stats_column_family) {
column_families_not_found.insert(
{edit.column_family_, edit.column_family_name_});
} else {
// recover persistent_stats CF from a DB that already contains it
if (is_persistent_stats_column_family) {
ColumnFamilyOptions cfo;
OptimizeForPersistentStats(&cfo);
cfd = CreateColumnFamily(cfo, &edit);
} else {
cfd = CreateColumnFamily(cf_options->second, &edit);
}
cfd->set_initialized();
builders.insert(std::make_pair(
edit.column_family_, std::unique_ptr<BaseReferencedVersionBuilder>(

3
include/rocksdb/db.h
View File

@ -59,6 +59,7 @@ class CompactionJobInfo;
#endif
extern const std::string kDefaultColumnFamilyName;
extern const std::string kPersistentStatsColumnFamilyName;
struct ColumnFamilyDescriptor {
std::string name;
ColumnFamilyOptions options;
@ -1335,7 +1336,7 @@ class DB {
// Given a window [start_time, end_time), setup a StatsHistoryIterator
// to access stats history. Note the start_time and end_time are epoch
// time measured in microsecond, and end_time is an exclusive bound.
// time measured in seconds, and end_time is an exclusive bound.
virtual Status GetStatsHistory(
uint64_t /*start_time*/, uint64_t /*end_time*/,
std::unique_ptr<StatsHistoryIterator>* /*stats_iterator*/) {

12
include/rocksdb/options.h
View File

@ -694,6 +694,18 @@ struct DBOptions {
// Default: 600
unsigned int stats_persist_period_sec = 600;
// If true, automatically persist stats to a hidden column family (column
// family name: ___rocksdb_stats_history___) every
// stats_persist_period_sec seconds; otherwise, write to an in-memory
// struct. User can query through `GetStatsHistory` API.
// If user attempts to create a column family with the same name on a DB
// which have previously set persist_stats_to_disk to true, the column family
// creation will fail, but the hidden column family will survive, as well as
// the previously persisted statistics.
// When peristing stats to disk, the stat name will be limited at 100 bytes.
// Default: false
bool persist_stats_to_disk = false;
// if not zero, periodically take stats snapshots and store in memory, the
// memory size for stats snapshots is capped at stats_history_buffer_size
// Default: 1MB

4
include/rocksdb/stats_history.h
View File

@ -49,10 +49,12 @@ class StatsHistoryIterator {
// REQUIRES: Valid()
virtual void Next() = 0;
// Return the time stamp (in microseconds) when stats history is recorded.
// Return the time stamp (in seconds) when stats history is recorded.
// REQUIRES: Valid()
virtual uint64_t GetStatsTime() const = 0;
virtual int GetFormatVersion() const { return -1; }
// Return the current stats history as an std::map which specifies the
// mapping from stats name to stats value . The underlying storage
// for the returned map is valid only until the next modification of

2
db/in_memory_stats_history.cc → monitoring/in_memory_stats_history.cc
View File

@ -6,7 +6,7 @@
// 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 "db/in_memory_stats_history.h"
#include "monitoring/in_memory_stats_history.h"
#include "db/db_impl/db_impl.h"
namespace rocksdb {

2
db/in_memory_stats_history.h → monitoring/in_memory_stats_history.h
View File

@ -25,7 +25,7 @@ namespace rocksdb {
class InMemoryStatsHistoryIterator final : public StatsHistoryIterator {
public:
// Setup InMemoryStatsHistoryIterator to return stats snapshots between
// microsecond timestamps [start_time, end_time)
// seconds timestamps [start_time, end_time)
InMemoryStatsHistoryIterator(uint64_t start_time, uint64_t end_time,
DBImpl* db_impl)
: start_time_(start_time),

171
monitoring/persistent_stats_history.cc Normal file
View File

@ -0,0 +1,171 @@
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root 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 "monitoring/persistent_stats_history.h"
#include <cstring>
#include <string>
#include <utility>
#include "db/db_impl/db_impl.h"
#include "port/likely.h"
#include "util/string_util.h"
namespace rocksdb {
// 10 digit seconds timestamp => [Sep 9, 2001 ~ Nov 20, 2286]
const int kNowSecondsStringLength = 10;
const std::string kFormatVersionKeyString =
"__persistent_stats_format_version__";
const std::string kCompatibleVersionKeyString =
"__persistent_stats_compatible_version__";
// Every release maintains two versions numbers for persistents stats: Current
// format version and compatible format version. Current format version
// designates what type of encoding will be used when writing to stats CF;
// compatible format version designates the minimum format version that
// can decode the stats CF encoded using the current format version.
const uint64_t kStatsCFCurrentFormatVersion = 1;
const uint64_t kStatsCFCompatibleFormatVersion = 1;
Status DecodePersistentStatsVersionNumber(DBImpl* db, StatsVersionKeyType type,
uint64_t* version_number) {
if (type >= StatsVersionKeyType::kKeyTypeMax) {
return Status::InvalidArgument("Invalid stats version key type provided");
}
std::string key;
if (type == StatsVersionKeyType::kFormatVersion) {
key = kFormatVersionKeyString;
} else if (type == StatsVersionKeyType::kCompatibleVersion) {
key = kCompatibleVersionKeyString;
}
ReadOptions options;
options.verify_checksums = true;
std::string result;
Status s = db->Get(options, db->PersistentStatsColumnFamily(), key, &result);
if (!s.ok() || result.empty()) {
return Status::NotFound("Persistent stats version key " + key +
" not found.");
}
// read version_number but do nothing in current version
*version_number = ParseUint64(result);
return Status::OK();
}
int EncodePersistentStatsKey(uint64_t now_seconds, const std::string& key,
int size, char* buf) {
char timestamp[kNowSecondsStringLength + 1];
// make time stamp string equal in length to allow sorting by time
snprintf(timestamp, sizeof(timestamp), "%010d",
static_cast<int>(now_seconds));
timestamp[kNowSecondsStringLength] = '\0';
return snprintf(buf, size, "%s#%s", timestamp, key.c_str());
}
void OptimizeForPersistentStats(ColumnFamilyOptions* cfo) {
cfo->write_buffer_size = 2 << 20;
cfo->target_file_size_base = 2 * 1048576;
cfo->max_bytes_for_level_base = 10 * 1048576;
cfo->snap_refresh_nanos = 0;
cfo->soft_pending_compaction_bytes_limit = 256 * 1048576;
cfo->hard_pending_compaction_bytes_limit = 1073741824ul;
cfo->compression = kNoCompression;
}
PersistentStatsHistoryIterator::~PersistentStatsHistoryIterator() {}
bool PersistentStatsHistoryIterator::Valid() const { return valid_; }
Status PersistentStatsHistoryIterator::status() const { return status_; }
void PersistentStatsHistoryIterator::Next() {
// increment start_time by 1 to avoid infinite loop
AdvanceIteratorByTime(GetStatsTime() + 1, end_time_);
}
uint64_t PersistentStatsHistoryIterator::GetStatsTime() const { return time_; }
const std::map<std::string, uint64_t>&
PersistentStatsHistoryIterator::GetStatsMap() const {
return stats_map_;
}
std::pair<uint64_t, std::string> parseKey(const Slice& key,
uint64_t start_time) {
std::pair<uint64_t, std::string> result;
std::string key_str = key.ToString();
std::string::size_type pos = key_str.find("#");
// TODO(Zhongyi): add counters to track parse failures?
if (pos == std::string::npos) {
result.first = port::kMaxUint64;
result.second.clear();
} else {
uint64_t parsed_time = ParseUint64(key_str.substr(0, pos));
// skip entries with timestamp smaller than start_time
if (parsed_time < start_time) {
result.first = port::kMaxUint64;
result.second = "";
} else {
result.first = parsed_time;
std::string key_resize = key_str.substr(pos + 1);
result.second = key_resize;
}
}
return result;
}
// advance the iterator to the next time between [start_time, end_time)
// if success, update time_ and stats_map_ with new_time and stats_map
void PersistentStatsHistoryIterator::AdvanceIteratorByTime(uint64_t start_time,
uint64_t end_time) {
// try to find next entry in stats_history_ map
if (db_impl_ != nullptr) {
ReadOptions ro;
Iterator* iter =
db_impl_->NewIterator(ro, db_impl_->PersistentStatsColumnFamily());
char timestamp[kNowSecondsStringLength + 1];
snprintf(timestamp, sizeof(timestamp), "%010d",
static_cast<int>(std::max(time_, start_time)));
timestamp[kNowSecondsStringLength] = '\0';
iter->Seek(timestamp);
// no more entries with timestamp >= start_time is found or version key
// is found to be incompatible
if (!iter->Valid()) {
valid_ = false;
delete iter;
return;
}
time_ = parseKey(iter->key(), start_time).first;
valid_ = true;
// check parsed time and invalid if it exceeds end_time
if (time_ > end_time) {
valid_ = false;
delete iter;
return;
}
// find all entries with timestamp equal to time_
std::map<std::string, uint64_t> new_stats_map;
std::pair<uint64_t, std::string> kv;
for (; iter->Valid(); iter->Next()) {
kv = parseKey(iter->key(), start_time);
if (kv.first != time_) {
break;
}
if (kv.second.compare(kFormatVersionKeyString) == 0) {
continue;
}
new_stats_map[kv.second] = ParseUint64(iter->value().ToString());
}
stats_map_.swap(new_stats_map);
delete iter;
} else {
valid_ = false;
}
}
} // namespace rocksdb

83
monitoring/persistent_stats_history.h Normal file
View File

@ -0,0 +1,83 @@
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root 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 "db/db_impl/db_impl.h"
#include "rocksdb/stats_history.h"
namespace rocksdb {
extern const std::string kFormatVersionKeyString;
extern const std::string kCompatibleVersionKeyString;
extern const uint64_t kStatsCFCurrentFormatVersion;
extern const uint64_t kStatsCFCompatibleFormatVersion;
enum StatsVersionKeyType : uint32_t {
kFormatVersion = 1,
kCompatibleVersion = 2,
kKeyTypeMax = 3
};
// Read the version number from persitent stats cf depending on type provided
// stores the version number in `*version_number`
// returns Status::OK() on success, or other status code on failure
Status DecodePersistentStatsVersionNumber(DBImpl* db, StatsVersionKeyType type,
uint64_t* version_number);
// Encode timestamp and stats key into buf
// Format: timestamp(10 digit) + '#' + key
// Total length of encoded key will be capped at 100 bytes
int EncodePersistentStatsKey(uint64_t timestamp, const std::string& key,
int size, char* buf);
void OptimizeForPersistentStats(ColumnFamilyOptions* cfo);
class PersistentStatsHistoryIterator final : public StatsHistoryIterator {
public:
PersistentStatsHistoryIterator(uint64_t start_time, uint64_t end_time,
DBImpl* db_impl)
: time_(0),
start_time_(start_time),
end_time_(end_time),
valid_(true),
db_impl_(db_impl) {
AdvanceIteratorByTime(start_time_, end_time_);
}
~PersistentStatsHistoryIterator() override;
bool Valid() const override;
Status status() const override;
void Next() override;
uint64_t GetStatsTime() const override;
const std::map<std::string, uint64_t>& GetStatsMap() const override;
private:
// advance the iterator to the next stats history record with timestamp
// between [start_time, end_time)
void AdvanceIteratorByTime(uint64_t start_time, uint64_t end_time);
// No copying allowed
PersistentStatsHistoryIterator(const PersistentStatsHistoryIterator&) =
delete;
void operator=(const PersistentStatsHistoryIterator&) = delete;
PersistentStatsHistoryIterator(PersistentStatsHistoryIterator&&) = delete;
PersistentStatsHistoryIterator& operator=(PersistentStatsHistoryIterator&&) =
delete;
uint64_t time_;
uint64_t start_time_;
uint64_t end_time_;
std::map<std::string, uint64_t> stats_map_;
Status status_;
bool valid_;
DBImpl* db_impl_;
};
} // namespace rocksdb

576
monitoring/stats_history_test.cc Normal file
View File

@ -0,0 +1,576 @@
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root 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 <limits>
#include <string>
#include <unordered_map>
#include "db/column_family.h"
#include "db/db_impl/db_impl.h"
#include "db/db_test_util.h"
#include "monitoring/persistent_stats_history.h"
#include "options/options_helper.h"
#include "port/stack_trace.h"
#include "rocksdb/cache.h"
#include "rocksdb/convenience.h"
#include "rocksdb/rate_limiter.h"
#include "rocksdb/stats_history.h"
#include "test_util/sync_point.h"
#include "test_util/testutil.h"
#include "util/random.h"
namespace rocksdb {
class StatsHistoryTest : public DBTestBase {
public:
StatsHistoryTest() : DBTestBase("/stats_history_test") {}
};
TEST_F(StatsHistoryTest, RunStatsDumpPeriodSec) {
Options options;
options.create_if_missing = true;
options.stats_dump_period_sec = 5;
std::unique_ptr<rocksdb::MockTimeEnv> mock_env;
mock_env.reset(new rocksdb::MockTimeEnv(env_));
mock_env->set_current_time(0); // in seconds
options.env = mock_env.get();
int counter = 0;
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
#if defined(OS_MACOSX) && !defined(NDEBUG)
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"InstrumentedCondVar::TimedWaitInternal", [&](void* arg) {
uint64_t time_us = *reinterpret_cast<uint64_t*>(arg);
if (time_us < mock_env->RealNowMicros()) {
*reinterpret_cast<uint64_t*>(arg) = mock_env->RealNowMicros() + 1000;
}
});
#endif // OS_MACOSX && !NDEBUG
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::DumpStats:1", [&](void* /*arg*/) { counter++; });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
Reopen(options);
ASSERT_EQ(5, dbfull()->GetDBOptions().stats_dump_period_sec);
dbfull()->TEST_WaitForDumpStatsRun([&] { mock_env->set_current_time(5); });
ASSERT_GE(counter, 1);
// Test cacel job through SetOptions
ASSERT_OK(dbfull()->SetDBOptions({{"stats_dump_period_sec", "0"}}));
int old_val = counter;
for (int i = 6; i < 20; ++i) {
dbfull()->TEST_WaitForDumpStatsRun([&] { mock_env->set_current_time(i); });
}
ASSERT_EQ(counter, old_val);
Close();
}
// Test persistent stats background thread scheduling and cancelling
TEST_F(StatsHistoryTest, StatsPersistScheduling) {
Options options;
options.create_if_missing = true;
options.stats_persist_period_sec = 5;
std::unique_ptr<rocksdb::MockTimeEnv> mock_env;
mock_env.reset(new rocksdb::MockTimeEnv(env_));
mock_env->set_current_time(0); // in seconds
options.env = mock_env.get();
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
#if defined(OS_MACOSX) && !defined(NDEBUG)
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"InstrumentedCondVar::TimedWaitInternal", [&](void* arg) {
uint64_t time_us = *reinterpret_cast<uint64_t*>(arg);
if (time_us < mock_env->RealNowMicros()) {
*reinterpret_cast<uint64_t*>(arg) = mock_env->RealNowMicros() + 1000;
}
});
#endif // OS_MACOSX && !NDEBUG
int counter = 0;
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::PersistStats:Entry", [&](void* /*arg*/) { counter++; });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
Reopen(options);
ASSERT_EQ(5, dbfull()->GetDBOptions().stats_persist_period_sec);
dbfull()->TEST_WaitForPersistStatsRun([&] { mock_env->set_current_time(5); });
ASSERT_GE(counter, 1);
// Test cacel job through SetOptions
ASSERT_TRUE(dbfull()->TEST_IsPersistentStatsEnabled());
ASSERT_OK(dbfull()->SetDBOptions({{"stats_persist_period_sec", "0"}}));
ASSERT_FALSE(dbfull()->TEST_IsPersistentStatsEnabled());
Close();
}
// Test enabling persistent stats for the first time
TEST_F(StatsHistoryTest, PersistentStatsFreshInstall) {
Options options;
options.create_if_missing = true;
options.stats_persist_period_sec = 0;
std::unique_ptr<rocksdb::MockTimeEnv> mock_env;
mock_env.reset(new rocksdb::MockTimeEnv(env_));
mock_env->set_current_time(0); // in seconds
options.env = mock_env.get();
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
#if defined(OS_MACOSX) && !defined(NDEBUG)
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"InstrumentedCondVar::TimedWaitInternal", [&](void* arg) {
uint64_t time_us = *reinterpret_cast<uint64_t*>(arg);
if (time_us < mock_env->RealNowMicros()) {
*reinterpret_cast<uint64_t*>(arg) = mock_env->RealNowMicros() + 1000;
}
});
#endif // OS_MACOSX && !NDEBUG
int counter = 0;
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::PersistStats:Entry", [&](void* /*arg*/) { counter++; });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
Reopen(options);
ASSERT_OK(dbfull()->SetDBOptions({{"stats_persist_period_sec", "5"}}));
ASSERT_EQ(5, dbfull()->GetDBOptions().stats_persist_period_sec);
dbfull()->TEST_WaitForPersistStatsRun([&] { mock_env->set_current_time(5); });
ASSERT_GE(counter, 1);
Close();
}
// TODO(Zhongyi): Move persistent stats related tests to a separate file
TEST_F(StatsHistoryTest, GetStatsHistoryInMemory) {
Options options;
options.create_if_missing = true;
options.stats_persist_period_sec = 5;
options.statistics = rocksdb::CreateDBStatistics();
std::unique_ptr<rocksdb::MockTimeEnv> mock_env;
mock_env.reset(new rocksdb::MockTimeEnv(env_));
mock_env->set_current_time(0); // in seconds
options.env = mock_env.get();
#if defined(OS_MACOSX) && !defined(NDEBUG)
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"InstrumentedCondVar::TimedWaitInternal", [&](void* arg) {
uint64_t time_us = *reinterpret_cast<uint64_t*>(arg);
if (time_us < mock_env->RealNowMicros()) {
*reinterpret_cast<uint64_t*>(arg) = mock_env->RealNowMicros() + 1000;
}
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
#endif // OS_MACOSX && !NDEBUG
CreateColumnFamilies({"pikachu"}, options);
ASSERT_OK(Put("foo", "bar"));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
int mock_time = 1;
// Wait for stats persist to finish
dbfull()->TEST_WaitForPersistStatsRun([&] { mock_env->set_current_time(5); });
std::unique_ptr<StatsHistoryIterator> stats_iter;
db_->GetStatsHistory(0 /*start_time*/, 6 /*end_time*/, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
// disabled stats snapshots
ASSERT_OK(dbfull()->SetDBOptions({{"stats_persist_period_sec", "0"}}));
size_t stats_count = 0;
for (; stats_iter->Valid(); stats_iter->Next()) {
auto stats_map = stats_iter->GetStatsMap();
ASSERT_EQ(stats_iter->GetStatsTime(), 5);
stats_count += stats_map.size();
}
ASSERT_GT(stats_count, 0);
// Wait a bit and verify no more stats are found
for (mock_time = 6; mock_time < 20; ++mock_time) {
dbfull()->TEST_WaitForPersistStatsRun(
[&] { mock_env->set_current_time(mock_time); });
}
db_->GetStatsHistory(0 /*start_time*/, 20 /*end_time*/, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
size_t stats_count_new = 0;
for (; stats_iter->Valid(); stats_iter->Next()) {
stats_count_new += stats_iter->GetStatsMap().size();
}
ASSERT_EQ(stats_count_new, stats_count);
Close();
}
TEST_F(StatsHistoryTest, InMemoryStatsHistoryPurging) {
Options options;
options.create_if_missing = true;
options.statistics = rocksdb::CreateDBStatistics();
options.stats_persist_period_sec = 1;
std::unique_ptr<rocksdb::MockTimeEnv> mock_env;
mock_env.reset(new rocksdb::MockTimeEnv(env_));
mock_env->set_current_time(0); // in seconds
options.env = mock_env.get();
#if defined(OS_MACOSX) && !defined(NDEBUG)
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"InstrumentedCondVar::TimedWaitInternal", [&](void* arg) {
uint64_t time_us = *reinterpret_cast<uint64_t*>(arg);
if (time_us < mock_env->RealNowMicros()) {
*reinterpret_cast<uint64_t*>(arg) = mock_env->RealNowMicros() + 1000;
}
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
#endif // OS_MACOSX && !NDEBUG
CreateColumnFamilies({"pikachu"}, options);
ASSERT_OK(Put("foo", "bar"));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
// some random operation to populate statistics
ASSERT_OK(Delete("foo"));
ASSERT_OK(Put("sol", "sol"));
ASSERT_OK(Put("epic", "epic"));
ASSERT_OK(Put("ltd", "ltd"));
ASSERT_EQ("sol", Get("sol"));
ASSERT_EQ("epic", Get("epic"));
ASSERT_EQ("ltd", Get("ltd"));
Iterator* iterator = db_->NewIterator(ReadOptions());
for (iterator->SeekToFirst(); iterator->Valid(); iterator->Next()) {
ASSERT_TRUE(iterator->key() == iterator->value());
}
delete iterator;
ASSERT_OK(Flush());
ASSERT_OK(Delete("sol"));
db_->CompactRange(CompactRangeOptions(), nullptr, nullptr);
int mock_time = 1;
// Wait for stats persist to finish
for (; mock_time < 5; ++mock_time) {
dbfull()->TEST_WaitForPersistStatsRun(
[&] { mock_env->set_current_time(mock_time); });
}
// second round of ops
ASSERT_OK(Put("saigon", "saigon"));
ASSERT_OK(Put("noodle talk", "noodle talk"));
ASSERT_OK(Put("ping bistro", "ping bistro"));
iterator = db_->NewIterator(ReadOptions());
for (iterator->SeekToFirst(); iterator->Valid(); iterator->Next()) {
ASSERT_TRUE(iterator->key() == iterator->value());
}
delete iterator;
ASSERT_OK(Flush());
db_->CompactRange(CompactRangeOptions(), nullptr, nullptr);
for (; mock_time < 10; ++mock_time) {
dbfull()->TEST_WaitForPersistStatsRun(
[&] { mock_env->set_current_time(mock_time); });
}
std::unique_ptr<StatsHistoryIterator> stats_iter;
db_->GetStatsHistory(0 /*start_time*/, 10 /*end_time*/, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
size_t stats_count = 0;
int slice_count = 0;
for (; stats_iter->Valid(); stats_iter->Next()) {
slice_count++;
auto stats_map = stats_iter->GetStatsMap();
stats_count += stats_map.size();
}
size_t stats_history_size = dbfull()->TEST_EstimateInMemoryStatsHistorySize();
ASSERT_GE(slice_count, 9);
ASSERT_GE(stats_history_size, 12000);
// capping memory cost at 12000 bytes since one slice is around 10000~12000
ASSERT_OK(dbfull()->SetDBOptions({{"stats_history_buffer_size", "12000"}}));
ASSERT_EQ(12000, dbfull()->GetDBOptions().stats_history_buffer_size);
// Wait for stats persist to finish
for (; mock_time < 20; ++mock_time) {
dbfull()->TEST_WaitForPersistStatsRun(
[&] { mock_env->set_current_time(mock_time); });
}
db_->GetStatsHistory(0 /*start_time*/, 20 /*end_time*/, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
size_t stats_count_reopen = 0;
slice_count = 0;
for (; stats_iter->Valid(); stats_iter->Next()) {
slice_count++;
auto stats_map = stats_iter->GetStatsMap();
stats_count_reopen += stats_map.size();
}
size_t stats_history_size_reopen =
dbfull()->TEST_EstimateInMemoryStatsHistorySize();
// only one slice can fit under the new stats_history_buffer_size
ASSERT_LT(slice_count, 2);
ASSERT_TRUE(stats_history_size_reopen < 12000 &&
stats_history_size_reopen > 0);
ASSERT_TRUE(stats_count_reopen < stats_count && stats_count_reopen > 0);
Close();
// TODO: may also want to verify stats timestamp to make sure we are purging
// the correct stats snapshot
}
int countkeys(Iterator* iter) {
int count = 0;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
count++;
}
return count;
}
TEST_F(StatsHistoryTest, GetStatsHistoryFromDisk) {
Options options;
options.create_if_missing = true;
options.stats_persist_period_sec = 5;
options.statistics = rocksdb::CreateDBStatistics();
options.persist_stats_to_disk = true;
std::unique_ptr<rocksdb::MockTimeEnv> mock_env;
mock_env.reset(new rocksdb::MockTimeEnv(env_));
mock_env->set_current_time(0); // in seconds
options.env = mock_env.get();
CreateColumnFamilies({"pikachu"}, options);
ASSERT_OK(Put("foo", "bar"));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_EQ(Get("foo"), "bar");
// Wait for stats persist to finish
dbfull()->TEST_WaitForPersistStatsRun([&] { mock_env->set_current_time(5); });
auto iter =
db_->NewIterator(ReadOptions(), dbfull()->PersistentStatsColumnFamily());
int key_count1 = countkeys(iter);
delete iter;
dbfull()->TEST_WaitForPersistStatsRun(
[&] { mock_env->set_current_time(10); });
iter =
db_->NewIterator(ReadOptions(), dbfull()->PersistentStatsColumnFamily());
int key_count2 = countkeys(iter);
delete iter;
dbfull()->TEST_WaitForPersistStatsRun(
[&] { mock_env->set_current_time(15); });
iter =
db_->NewIterator(ReadOptions(), dbfull()->PersistentStatsColumnFamily());
int key_count3 = countkeys(iter);
delete iter;
ASSERT_GE(key_count2, key_count1);
ASSERT_GE(key_count3, key_count2);
ASSERT_EQ(key_count3 - key_count2, key_count2 - key_count1);
std::unique_ptr<StatsHistoryIterator> stats_iter;
db_->GetStatsHistory(0 /*start_time*/, 16 /*end_time*/, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
size_t stats_count = 0;
int slice_count = 0;
int non_zero_count = 0;
for (int i = 1; stats_iter->Valid(); stats_iter->Next(), i++) {
slice_count++;
auto stats_map = stats_iter->GetStatsMap();
ASSERT_EQ(stats_iter->GetStatsTime(), 5 * i);
for (auto& stat : stats_map) {
if (stat.second != 0) {
non_zero_count++;
}
}
stats_count += stats_map.size();
}
ASSERT_EQ(slice_count, 3);
// 2 extra keys for format version
ASSERT_EQ(stats_count, key_count3 - 2);
// verify reopen will not cause data loss
ReopenWithColumnFamilies({"default", "pikachu"}, options);
db_->GetStatsHistory(0 /*start_time*/, 16 /*end_time*/, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
size_t stats_count_reopen = 0;
int slice_count_reopen = 0;
int non_zero_count_recover = 0;
for (; stats_iter->Valid(); stats_iter->Next()) {
slice_count_reopen++;
auto stats_map = stats_iter->GetStatsMap();
for (auto& stat : stats_map) {
if (stat.second != 0) {
non_zero_count_recover++;
}
}
stats_count_reopen += stats_map.size();
}
ASSERT_EQ(non_zero_count, non_zero_count_recover);
ASSERT_EQ(slice_count, slice_count_reopen);
ASSERT_EQ(stats_count, stats_count_reopen);
Close();
}
// Test persisted stats matches the value found in options.statistics and
// the stats value retains after DB reopen
TEST_F(StatsHistoryTest, PersitentStatsVerifyValue) {
Options options;
options.create_if_missing = true;
options.stats_persist_period_sec = 5;
options.statistics = rocksdb::CreateDBStatistics();
options.persist_stats_to_disk = true;
std::unique_ptr<rocksdb::MockTimeEnv> mock_env;
mock_env.reset(new rocksdb::MockTimeEnv(env_));
std::map<std::string, uint64_t> stats_map_before;
ASSERT_TRUE(options.statistics->getTickerMap(&stats_map_before));
mock_env->set_current_time(0); // in seconds
options.env = mock_env.get();
CreateColumnFamilies({"pikachu"}, options);
ASSERT_OK(Put("foo", "bar"));
ReopenWithColumnFamilies({"default", "pikachu"}, options);
ASSERT_EQ(Get("foo"), "bar");
// Wait for stats persist to finish
dbfull()->TEST_WaitForPersistStatsRun([&] { mock_env->set_current_time(5); });
auto iter =
db_->NewIterator(ReadOptions(), dbfull()->PersistentStatsColumnFamily());
countkeys(iter);
delete iter;
dbfull()->TEST_WaitForPersistStatsRun(
[&] { mock_env->set_current_time(10); });
iter =
db_->NewIterator(ReadOptions(), dbfull()->PersistentStatsColumnFamily());
countkeys(iter);
delete iter;
dbfull()->TEST_WaitForPersistStatsRun(
[&] { mock_env->set_current_time(15); });
iter =
db_->NewIterator(ReadOptions(), dbfull()->PersistentStatsColumnFamily());
countkeys(iter);
delete iter;
dbfull()->TEST_WaitForPersistStatsRun(
[&] { mock_env->set_current_time(20); });
std::map<std::string, uint64_t> stats_map_after;
ASSERT_TRUE(options.statistics->getTickerMap(&stats_map_after));
std::unique_ptr<StatsHistoryIterator> stats_iter;
db_->GetStatsHistory(0 /*start_time*/, 21 /*end_time*/, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
std::string sample = "rocksdb.num.iterator.deleted";
uint64_t recovered_value = 0;
for (int i = 1; stats_iter->Valid(); stats_iter->Next(), ++i) {
auto stats_map = stats_iter->GetStatsMap();
ASSERT_EQ(stats_iter->GetStatsTime(), 5 * i);
for (const auto& stat : stats_map) {
if (sample.compare(stat.first) == 0) {
recovered_value += stat.second;
}
}
}
ASSERT_EQ(recovered_value, stats_map_after[sample]);
// test stats value retains after recovery
ReopenWithColumnFamilies({"default", "pikachu"}, options);
db_->GetStatsHistory(0 /*start_time*/, 21 /*end_time*/, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
uint64_t new_recovered_value = 0;
for (int i = 1; stats_iter->Valid(); stats_iter->Next(), i++) {
auto stats_map = stats_iter->GetStatsMap();
ASSERT_EQ(stats_iter->GetStatsTime(), 5 * i);
for (const auto& stat : stats_map) {
if (sample.compare(stat.first) == 0) {
new_recovered_value += stat.second;
}
}
}
ASSERT_EQ(recovered_value, new_recovered_value);
// TODO(Zhongyi): also add test to read raw values from disk and verify
// correctness
Close();
}
// TODO(Zhongyi): add test for different format versions
TEST_F(StatsHistoryTest, PersistentStatsCreateColumnFamilies) {
Options options;
options.create_if_missing = true;
options.stats_persist_period_sec = 5;
options.statistics = rocksdb::CreateDBStatistics();
options.persist_stats_to_disk = true;
std::unique_ptr<rocksdb::MockTimeEnv> mock_env;
mock_env.reset(new rocksdb::MockTimeEnv(env_));
mock_env->set_current_time(0); // in seconds
options.env = mock_env.get();
ASSERT_OK(TryReopen(options));
CreateColumnFamilies({"one", "two", "three"}, options);
ASSERT_OK(Put(1, "foo", "bar"));
ReopenWithColumnFamilies({"default", "one", "two", "three"}, options);
ASSERT_EQ(Get(2, "foo"), "bar");
CreateColumnFamilies({"four"}, options);
ReopenWithColumnFamilies({"default", "one", "two", "three", "four"}, options);
ASSERT_EQ(Get(2, "foo"), "bar");
dbfull()->TEST_WaitForPersistStatsRun([&] { mock_env->set_current_time(5); });
auto iter =
db_->NewIterator(ReadOptions(), dbfull()->PersistentStatsColumnFamily());
int key_count = countkeys(iter);
delete iter;
ASSERT_GE(key_count, 0);
uint64_t num_write_wal = 0;
std::string sample = "rocksdb.write.wal";
std::unique_ptr<StatsHistoryIterator> stats_iter;
db_->GetStatsHistory(0 /*start_time*/, 5 /*end_time*/, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
for (; stats_iter->Valid(); stats_iter->Next()) {
auto stats_map = stats_iter->GetStatsMap();
for (const auto& stat : stats_map) {
if (sample.compare(stat.first) == 0) {
num_write_wal += stat.second;
}
}
}
stats_iter.reset();
ASSERT_EQ(num_write_wal, 2);
options.persist_stats_to_disk = false;
ReopenWithColumnFamilies({"default", "one", "two", "three", "four"}, options);
int cf_count = 0;
for (auto cfd : *dbfull()->versions_->GetColumnFamilySet()) {
(void)cfd;
cf_count++;
}
// persistent stats cf will be implicitly opened even if
// persist_stats_to_disk is false
ASSERT_EQ(cf_count, 6);
ASSERT_EQ(Get(2, "foo"), "bar");
// attempt to create column family using same name, should fail
ColumnFamilyOptions cf_opts(options);
ColumnFamilyHandle* handle;
ASSERT_NOK(db_->CreateColumnFamily(cf_opts, kPersistentStatsColumnFamilyName,
&handle));
options.persist_stats_to_disk = true;
ReopenWithColumnFamilies({"default", "one", "two", "three", "four"}, options);
ASSERT_NOK(db_->CreateColumnFamily(cf_opts, kPersistentStatsColumnFamilyName,
&handle));
// verify stats is not affected by prior failed CF creation
db_->GetStatsHistory(0 /*start_time*/, 5 /*end_time*/, &stats_iter);
ASSERT_TRUE(stats_iter != nullptr);
num_write_wal = 0;
for (; stats_iter->Valid(); stats_iter->Next()) {
auto stats_map = stats_iter->GetStatsMap();
for (const auto& stat : stats_map) {
if (sample.compare(stat.first) == 0) {
num_write_wal += stat.second;
}
}
}
ASSERT_EQ(num_write_wal, 2);
Close();
Destroy(options);
}
TEST_F(StatsHistoryTest, PersistentStatsReadOnly) {
ASSERT_OK(Put("bar", "v2"));
Close();
auto options = CurrentOptions();
options.stats_persist_period_sec = 5;
options.persist_stats_to_disk = true;
assert(options.env == env_);
ASSERT_OK(ReadOnlyReopen(options));
ASSERT_EQ("v2", Get("bar"));
Close();
// Reopen and flush memtable.
Reopen(options);
Flush();
Close();
// Now check keys in read only mode.
ASSERT_OK(ReadOnlyReopen(options));
}
} // namespace rocksdb
int main(int argc, char** argv) {
rocksdb::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}

5
options/db_options.cc
View File

@ -84,7 +84,8 @@ ImmutableDBOptions::ImmutableDBOptions(const DBOptions& options)
two_write_queues(options.two_write_queues),
manual_wal_flush(options.manual_wal_flush),
atomic_flush(options.atomic_flush),
avoid_unnecessary_blocking_io(options.avoid_unnecessary_blocking_io) {
avoid_unnecessary_blocking_io(options.avoid_unnecessary_blocking_io),
persist_stats_to_disk(options.persist_stats_to_disk) {
}
void ImmutableDBOptions::Dump(Logger* log) const {
@ -222,6 +223,8 @@ void ImmutableDBOptions::Dump(Logger* log) const {
ROCKS_LOG_HEADER(log,
" Options.avoid_unnecessary_blocking_io: %d",
avoid_unnecessary_blocking_io);
ROCKS_LOG_HEADER(log, " Options.persist_stats_to_disk: %u",
persist_stats_to_disk);
}
MutableDBOptions::MutableDBOptions()

1
options/db_options.h
View File

@ -81,6 +81,7 @@ struct ImmutableDBOptions {
bool manual_wal_flush;
bool atomic_flush;
bool avoid_unnecessary_blocking_io;
bool persist_stats_to_disk;
};
struct MutableDBOptions {

1
options/options.cc
View File

@ -502,7 +502,6 @@ ColumnFamilyOptions* ColumnFamilyOptions::OptimizeForSmallDb(
BlockBasedTableOptions::IndexType::kTwoLevelIndexSearch;
table_factory.reset(new BlockBasedTableFactory(table_options));
return this;
}

5
options/options_helper.cc
View File

@ -84,6 +84,7 @@ DBOptions BuildDBOptions(const ImmutableDBOptions& immutable_db_options,
options.stats_dump_period_sec = mutable_db_options.stats_dump_period_sec;
options.stats_persist_period_sec =
mutable_db_options.stats_persist_period_sec;
options.persist_stats_to_disk = immutable_db_options.persist_stats_to_disk;
options.stats_history_buffer_size =
mutable_db_options.stats_history_buffer_size;
options.advise_random_on_open = immutable_db_options.advise_random_on_open;
@ -1580,6 +1581,10 @@ std::unordered_map<std::string, OptionTypeInfo>
{offsetof(struct DBOptions, stats_persist_period_sec),
OptionType::kUInt, OptionVerificationType::kNormal, true,
offsetof(struct MutableDBOptions, stats_persist_period_sec)}},
{"persist_stats_to_disk",
{offsetof(struct DBOptions, persist_stats_to_disk),
OptionType::kBoolean, OptionVerificationType::kNormal, false,
offsetof(struct ImmutableDBOptions, persist_stats_to_disk)}},
{"stats_history_buffer_size",
{offsetof(struct DBOptions, stats_history_buffer_size),
OptionType::kSizeT, OptionVerificationType::kNormal, true,

1
options/options_settable_test.cc
View File

@ -265,6 +265,7 @@ TEST_F(OptionsSettableTest, DBOptionsAllFieldsSettable) {
"allow_mmap_writes=false;"
"stats_dump_period_sec=70127;"
"stats_persist_period_sec=54321;"
"persist_stats_to_disk=true;"
"stats_history_buffer_size=14159;"
"allow_fallocate=true;"
"allow_mmap_reads=false;"

2
options/options_test.cc
View File

@ -129,6 +129,7 @@ TEST_F(OptionsTest, GetOptionsFromMapTest) {
{"skip_log_error_on_recovery", "false"},
{"stats_dump_period_sec", "46"},
{"stats_persist_period_sec", "57"},
{"persist_stats_to_disk", "false"},
{"stats_history_buffer_size", "69"},
{"advise_random_on_open", "true"},
{"use_adaptive_mutex", "false"},
@ -267,6 +268,7 @@ TEST_F(OptionsTest, GetOptionsFromMapTest) {
ASSERT_EQ(new_db_opt.skip_log_error_on_recovery, false);
ASSERT_EQ(new_db_opt.stats_dump_period_sec, 46U);
ASSERT_EQ(new_db_opt.stats_persist_period_sec, 57U);
ASSERT_EQ(new_db_opt.persist_stats_to_disk, false);
ASSERT_EQ(new_db_opt.stats_history_buffer_size, 69U);
ASSERT_EQ(new_db_opt.advise_random_on_open, true);
ASSERT_EQ(new_db_opt.use_adaptive_mutex, false);

4
src.mk
View File

@ -36,7 +36,6 @@ LIB_SOURCES = \
db/flush_job.cc \
db/flush_scheduler.cc \
db/forward_iterator.cc \
db/in_memory_stats_history.cc \
db/internal_stats.cc \
db/logs_with_prep_tracker.cc \
db/log_reader.cc \
@ -86,10 +85,12 @@ LIB_SOURCES = \
memtable/write_buffer_manager.cc \
monitoring/histogram.cc \
monitoring/histogram_windowing.cc \
monitoring/in_memory_stats_history.cc \
monitoring/instrumented_mutex.cc \
monitoring/iostats_context.cc \
monitoring/perf_context.cc \
monitoring/perf_level.cc \
monitoring/persistent_stats_history.cc \
monitoring/statistics.cc \
monitoring/thread_status_impl.cc \
monitoring/thread_status_updater.cc \
@ -352,6 +353,7 @@ MAIN_SOURCES = \
monitoring/histogram_test.cc \
monitoring/iostats_context_test.cc \
monitoring/statistics_test.cc \
monitoring/stats_history_test.cc \
options/options_test.cc \
table/block_based/block_based_filter_block_test.cc \
table/block_based/block_test.cc \

3
tools/db_bench_tool.cc
View File

@ -1146,6 +1146,8 @@ DEFINE_uint64(stats_dump_period_sec, rocksdb::Options().stats_dump_period_sec,
DEFINE_uint64(stats_persist_period_sec,
rocksdb::Options().stats_persist_period_sec,
"Gap between persisting stats in seconds");
DEFINE_bool(persist_stats_to_disk, rocksdb::Options().persist_stats_to_disk,
"whether to persist stats to disk");
DEFINE_uint64(stats_history_buffer_size,
rocksdb::Options().stats_history_buffer_size,
"Max number of stats snapshots to keep in memory");
@ -3727,6 +3729,7 @@ class Benchmark {
static_cast<unsigned int>(FLAGS_stats_dump_period_sec);
options.stats_persist_period_sec =
static_cast<unsigned int>(FLAGS_stats_persist_period_sec);
options.persist_stats_to_disk = FLAGS_persist_stats_to_disk;
options.stats_history_buffer_size =
static_cast<size_t>(FLAGS_stats_history_buffer_size);