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// 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).
#include "table/block_based/block_based_table_reader.h"
#include <cmath>
#include <memory>
#include <string>
#include "cache/cache_reservation_manager.h"
#include "db/db_test_util.h"
#include "db/table_properties_collector.h"
#include "file/file_util.h"
#include "options/options_helper.h"
#include "port/port.h"
#include "port/stack_trace.h"
#include "rocksdb/compression_type.h"
#include "rocksdb/db.h"
#include "rocksdb/file_system.h"
#include "rocksdb/options.h"
#include "table/block_based/block_based_table_builder.h"
#include "table/block_based/block_based_table_factory.h"
#include "table/block_based/partitioned_index_iterator.h"
#include "table/format.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
#include "util/random.h"
namespace ROCKSDB_NAMESPACE {
class BlockBasedTableReaderBaseTest : public testing::Test {
public:
static constexpr int kBytesPerEntry = 256;
// 16 = (default block size) 4 * 1024 / kBytesPerEntry
static constexpr int kEntriesPerBlock = 16;
protected:
// Prepare key-value pairs to occupy multiple blocks.
// Each (key, value) pair is `kBytesPerEntry` byte, every kEntriesPerBlock
// pairs constitute 1 block.
// If mixed_with_human_readable_string_value == true,
// then adjacent blocks contain values with different compression
// complexity: human readable strings are easier to compress than random
// strings. key is an internal key.
// When ts_sz > 0 and `same_key_diff_ts` is true, this
// function generate keys with the same user provided key, with different
// user defined timestamps and different sequence number to differentiate them
static std::vector<std::pair<std::string, std::string>> GenerateKVMap(
int num_block = 2, bool mixed_with_human_readable_string_value = false,
size_t ts_sz = 0, bool same_key_diff_ts = false) {
std::vector<std::pair<std::string, std::string>> kv;
SequenceNumber seq_no = 0;
uint64_t current_udt = 0;
if (same_key_diff_ts) {
// These numbers are based on the number of keys to create + an arbitrary
// buffer number (100) to avoid overflow.
current_udt = kEntriesPerBlock * num_block + 100;
seq_no = kEntriesPerBlock * num_block + 100;
}
Random rnd(101);
uint32_t key = 0;
// To make each (key, value) pair occupy exactly kBytesPerEntry bytes.
int value_size = kBytesPerEntry - (8 + static_cast<int>(ts_sz) +
static_cast<int>(kNumInternalBytes));
for (int block = 0; block < num_block; block++) {
for (int i = 0; i < kEntriesPerBlock; i++) {
char k[9] = {0};
// Internal key is constructed directly from this key,
// and internal key size is required to be >= 8 bytes,
// so use %08u as the format string.
snprintf(k, sizeof(k), "%08u", key);
std::string v;
if (mixed_with_human_readable_string_value) {
v = (block % 2) ? rnd.HumanReadableString(value_size)
: rnd.RandomString(value_size);
} else {
v = rnd.RandomString(value_size);
}
std::string user_key = std::string(k);
if (ts_sz > 0) {
if (same_key_diff_ts) {
PutFixed64(&user_key, current_udt);
current_udt -= 1;
} else {
PutFixed64(&user_key, 0);
}
}
InternalKey internal_key(user_key, seq_no, ValueType::kTypeValue);
kv.emplace_back(internal_key.Encode().ToString(), v);
if (same_key_diff_ts) {
seq_no -= 1;
} else {
key++;
}
}
}
return kv;
}
void SetUp() override {
SetupSyncPointsToMockDirectIO();
test_dir_ = test::PerThreadDBPath("block_based_table_reader_test");
env_ = Env::Default();
fs_ = FileSystem::Default();
ASSERT_OK(fs_->CreateDir(test_dir_, IOOptions(), nullptr));
ConfigureTableFactory();
}
virtual void ConfigureTableFactory() = 0;
void TearDown() override { EXPECT_OK(DestroyDir(env_, test_dir_)); }
// Creates a table with the specificied key value pairs (kv).
void CreateTable(const std::string& table_name,
const ImmutableOptions& ioptions,
const CompressionType& compression_type,
const std::vector<std::pair<std::string, std::string>>& kv,
uint32_t compression_parallel_threads = 1,
uint32_t compression_dict_bytes = 0) {
std::unique_ptr<WritableFileWriter> writer;
NewFileWriter(table_name, &writer);
InternalKeyComparator comparator(ioptions.user_comparator);
ColumnFamilyOptions cf_options;
cf_options.prefix_extractor = options_.prefix_extractor;
MutableCFOptions moptions(cf_options);
CompressionOptions compression_opts;
compression_opts.parallel_threads = compression_parallel_threads;
// Enable compression dictionary and set a buffering limit that is the same
// as each block's size.
compression_opts.max_dict_bytes = compression_dict_bytes;
compression_opts.max_dict_buffer_bytes = compression_dict_bytes;
IntTblPropCollectorFactories factories;
const ReadOptions read_options;
const WriteOptions write_options;
std::unique_ptr<TableBuilder> table_builder(
options_.table_factory->NewTableBuilder(
TableBuilderOptions(ioptions, moptions, read_options, write_options,
comparator, &factories, compression_type,
compression_opts, 0 /* column_family_id */,
kDefaultColumnFamilyName, -1 /* level */),
writer.get()));
// Build table.
for (auto it = kv.begin(); it != kv.end(); it++) {
std::string v = it->second;
table_builder->Add(it->first, v);
}
ASSERT_OK(table_builder->Finish());
}
void NewBlockBasedTableReader(const FileOptions& foptions,
const ImmutableOptions& ioptions,
const InternalKeyComparator& comparator,
const std::string& table_name,
std::unique_ptr<BlockBasedTable>* table,
bool prefetch_index_and_filter_in_cache = true,
Status* status = nullptr,
bool user_defined_timestamps_persisted = true) {
const MutableCFOptions moptions(options_);
TableReaderOptions table_reader_options = TableReaderOptions(
ioptions, moptions.prefix_extractor, foptions, comparator,
0 /* block_protection_bytes_per_key */, false /* _skip_filters */,
false /* _immortal */, false /* _force_direct_prefetch */,
-1 /* _level */, nullptr /* _block_cache_tracer */,
0 /* _max_file_size_for_l0_meta_pin */, "" /* _cur_db_session_id */,
0 /* _cur_file_num */, {} /* _unique_id */, 0 /* _largest_seqno */,
0 /* _tail_size */, user_defined_timestamps_persisted);
std::unique_ptr<RandomAccessFileReader> file;
NewFileReader(table_name, foptions, &file);
uint64_t file_size = 0;
ASSERT_OK(env_->GetFileSize(Path(table_name), &file_size));
ReadOptions read_opts;
read_opts.verify_checksums = true;
std::unique_ptr<TableReader> general_table;
Status s = options_.table_factory->NewTableReader(
read_opts, table_reader_options, std::move(file), file_size,
&general_table, prefetch_index_and_filter_in_cache);
if (s.ok()) {
table->reset(reinterpret_cast<BlockBasedTable*>(general_table.release()));
}
if (status) {
*status = s;
}
}
std::string Path(const std::string& fname) { return test_dir_ + "/" + fname; }
std::string test_dir_;
Env* env_;
std::shared_ptr<FileSystem> fs_;
Options options_;
private:
void WriteToFile(const std::string& content, const std::string& filename) {
std::unique_ptr<FSWritableFile> f;
ASSERT_OK(fs_->NewWritableFile(Path(filename), FileOptions(), &f, nullptr));
ASSERT_OK(f->Append(content, IOOptions(), nullptr));
ASSERT_OK(f->Close(IOOptions(), nullptr));
}
void NewFileWriter(const std::string& filename,
std::unique_ptr<WritableFileWriter>* writer) {
std::string path = Path(filename);
EnvOptions env_options;
FileOptions foptions;
std::unique_ptr<FSWritableFile> file;
ASSERT_OK(fs_->NewWritableFile(path, foptions, &file, nullptr));
writer->reset(new WritableFileWriter(std::move(file), path, env_options));
}
void NewFileReader(const std::string& filename, const FileOptions& opt,
std::unique_ptr<RandomAccessFileReader>* reader) {
std::string path = Path(filename);
std::unique_ptr<FSRandomAccessFile> f;
ASSERT_OK(fs_->NewRandomAccessFile(path, opt, &f, nullptr));
reader->reset(new RandomAccessFileReader(std::move(f), path,
env_->GetSystemClock().get()));
}
};
// Param 1: compression type
// Param 2: whether to use direct reads
// Param 3: Block Based Table Index type
// Param 4: BBTO no_block_cache option
// Param 5: test mode for the user-defined timestamp feature
// Param 6: number of parallel compression threads
// Param 7: CompressionOptions.max_dict_bytes and
// CompressionOptions.max_dict_buffer_bytes to enable/disable
// compression dictionary.
// Param 8: test mode to specify the pattern for generating key / value. When
// true, generate keys with the same user provided key, different
// user-defined timestamps (if udt enabled), different sequence
// numbers. This test mode is used for testing `Get`. When false,
// generate keys with different user provided key, same user-defined
// timestamps (if udt enabled), same sequence number. This test mode is
// used for testing `Get`, `MultiGet`, and `NewIterator`.
class BlockBasedTableReaderTest
: public BlockBasedTableReaderBaseTest,
public testing::WithParamInterface<std::tuple<
CompressionType, bool, BlockBasedTableOptions::IndexType, bool,
test::UserDefinedTimestampTestMode, uint32_t, uint32_t, bool>> {
protected:
void SetUp() override {
compression_type_ = std::get<0>(GetParam());
use_direct_reads_ = std::get<1>(GetParam());
test::UserDefinedTimestampTestMode udt_test_mode = std::get<4>(GetParam());
udt_enabled_ = test::IsUDTEnabled(udt_test_mode);
persist_udt_ = test::ShouldPersistUDT(udt_test_mode);
compression_parallel_threads_ = std::get<5>(GetParam());
compression_dict_bytes_ = std::get<6>(GetParam());
same_key_diff_ts_ = std::get<7>(GetParam());
BlockBasedTableReaderBaseTest::SetUp();
}
void ConfigureTableFactory() override {
BlockBasedTableOptions opts;
opts.index_type = std::get<2>(GetParam());
opts.no_block_cache = std::get<3>(GetParam());
opts.filter_policy.reset(NewBloomFilterPolicy(10, false));
opts.partition_filters =
opts.index_type ==
BlockBasedTableOptions::IndexType::kTwoLevelIndexSearch;
opts.metadata_cache_options.partition_pinning = PinningTier::kAll;
options_.table_factory.reset(
static_cast<BlockBasedTableFactory*>(NewBlockBasedTableFactory(opts)));
options_.prefix_extractor =
std::shared_ptr<const SliceTransform>(NewFixedPrefixTransform(3));
}
CompressionType compression_type_;
bool use_direct_reads_;
bool udt_enabled_;
bool persist_udt_;
uint32_t compression_parallel_threads_;
uint32_t compression_dict_bytes_;
bool same_key_diff_ts_;
};
class BlockBasedTableReaderGetTest : public BlockBasedTableReaderTest {};
TEST_P(BlockBasedTableReaderGetTest, Get) {
Options options;
if (udt_enabled_) {
options.comparator = test::BytewiseComparatorWithU64TsWrapper();
}
options.persist_user_defined_timestamps = persist_udt_;
size_t ts_sz = options.comparator->timestamp_size();
std::vector<std::pair<std::string, std::string>> kv =
BlockBasedTableReaderBaseTest::GenerateKVMap(
100 /* num_block */,
true /* mixed_with_human_readable_string_value */, ts_sz,
same_key_diff_ts_);
std::string table_name = "BlockBasedTableReaderGetTest_Get" +
CompressionTypeToString(compression_type_);
ImmutableOptions ioptions(options);
CreateTable(table_name, ioptions, compression_type_, kv,
compression_parallel_threads_, compression_dict_bytes_);
std::unique_ptr<BlockBasedTable> table;
FileOptions foptions;
foptions.use_direct_reads = use_direct_reads_;
InternalKeyComparator comparator(options.comparator);
NewBlockBasedTableReader(foptions, ioptions, comparator, table_name, &table,
true /* prefetch_index_and_filter_in_cache */,
nullptr /* status */, persist_udt_);
ReadOptions read_opts;
ASSERT_OK(
table->VerifyChecksum(read_opts, TableReaderCaller::kUserVerifyChecksum));
for (size_t i = 0; i < kv.size(); i += 1) {
Slice key = kv[i].first;
Slice lkey = key;
std::string lookup_ikey;
if (udt_enabled_ && !persist_udt_) {
// When user-defined timestamps are collapsed to be the minimum timestamp,
// we also read with the minimum timestamp to be able to retrieve each
// value.
ReplaceInternalKeyWithMinTimestamp(&lookup_ikey, key, ts_sz);
lkey = lookup_ikey;
}
// Reading the first entry in a block caches the whole block.
if (i % kEntriesPerBlock == 0) {
ASSERT_FALSE(table->TEST_KeyInCache(read_opts, lkey.ToString()));
} else {
ASSERT_TRUE(table->TEST_KeyInCache(read_opts, lkey.ToString()));
}
PinnableSlice value;
GetContext get_context(options.comparator, nullptr, nullptr, nullptr,
GetContext::kNotFound, ExtractUserKey(key), &value,
nullptr, nullptr, nullptr, nullptr,
true /* do_merge */, nullptr, nullptr, nullptr,
nullptr, nullptr, nullptr);
ASSERT_OK(table->Get(read_opts, lkey, &get_context, nullptr));
ASSERT_EQ(value.ToString(), kv[i].second);
ASSERT_TRUE(table->TEST_KeyInCache(read_opts, lkey.ToString()));
}
}
// Tests MultiGet in both direct IO and non-direct IO mode.
// The keys should be in cache after MultiGet.
TEST_P(BlockBasedTableReaderTest, MultiGet) {
Options options;
ReadOptions read_opts;
std::string dummy_ts(sizeof(uint64_t), '\0');
Slice read_timestamp = dummy_ts;
if (udt_enabled_) {
options.comparator = test::BytewiseComparatorWithU64TsWrapper();
read_opts.timestamp = &read_timestamp;
}
options.persist_user_defined_timestamps = persist_udt_;
size_t ts_sz = options.comparator->timestamp_size();
std::vector<std::pair<std::string, std::string>> kv =
BlockBasedTableReaderBaseTest::GenerateKVMap(
100 /* num_block */,
true /* mixed_with_human_readable_string_value */, ts_sz);
// Prepare keys, values, and statuses for MultiGet.
autovector<Slice, MultiGetContext::MAX_BATCH_SIZE> keys;
autovector<Slice, MultiGetContext::MAX_BATCH_SIZE> keys_without_timestamps;
autovector<PinnableSlice, MultiGetContext::MAX_BATCH_SIZE> values;
autovector<Status, MultiGetContext::MAX_BATCH_SIZE> statuses;
autovector<const std::string*, MultiGetContext::MAX_BATCH_SIZE>
expected_values;
{
const int step =
static_cast<int>(kv.size()) / MultiGetContext::MAX_BATCH_SIZE;
auto it = kv.begin();
for (int i = 0; i < MultiGetContext::MAX_BATCH_SIZE; i++) {
keys.emplace_back(it->first);
if (ts_sz > 0) {
Slice ukey_without_ts =
ExtractUserKeyAndStripTimestamp(it->first, ts_sz);
keys_without_timestamps.push_back(ukey_without_ts);
} else {
keys_without_timestamps.emplace_back(ExtractUserKey(it->first));
}
values.emplace_back();
statuses.emplace_back();
expected_values.push_back(&(it->second));
std::advance(it, step);
}
}
std::string table_name = "BlockBasedTableReaderTest_MultiGet" +
CompressionTypeToString(compression_type_);
ImmutableOptions ioptions(options);
CreateTable(table_name, ioptions, compression_type_, kv,
compression_parallel_threads_, compression_dict_bytes_);
std::unique_ptr<BlockBasedTable> table;
FileOptions foptions;
foptions.use_direct_reads = use_direct_reads_;
InternalKeyComparator comparator(options.comparator);
NewBlockBasedTableReader(foptions, ioptions, comparator, table_name, &table,
true /* bool prefetch_index_and_filter_in_cache */,
nullptr /* status */, persist_udt_);
ASSERT_OK(
table->VerifyChecksum(read_opts, TableReaderCaller::kUserVerifyChecksum));
// Ensure that keys are not in cache before MultiGet.
for (auto& key : keys) {
ASSERT_FALSE(table->TEST_KeyInCache(read_opts, key.ToString()));
}
// Prepare MultiGetContext.
autovector<GetContext, MultiGetContext::MAX_BATCH_SIZE> get_context;
autovector<KeyContext, MultiGetContext::MAX_BATCH_SIZE> key_context;
autovector<KeyContext*, MultiGetContext::MAX_BATCH_SIZE> sorted_keys;
for (size_t i = 0; i < keys.size(); ++i) {
get_context.emplace_back(options.comparator, nullptr, nullptr, nullptr,
GetContext::kNotFound, ExtractUserKey(keys[i]),
&values[i], nullptr, nullptr, nullptr, nullptr,
true /* do_merge */, nullptr, nullptr, nullptr,
nullptr, nullptr, nullptr);
key_context.emplace_back(nullptr, keys_without_timestamps[i], &values[i],
nullptr, nullptr, &statuses.back());
key_context.back().get_context = &get_context.back();
}
for (auto& key_ctx : key_context) {
sorted_keys.emplace_back(&key_ctx);
}
MultiGetContext ctx(&sorted_keys, 0, sorted_keys.size(), 0, read_opts,
fs_.get(), nullptr);
// Execute MultiGet.
MultiGetContext::Range range = ctx.GetMultiGetRange();
PerfContext* perf_ctx = get_perf_context();
perf_ctx->Reset();
table->MultiGet(read_opts, &range, nullptr);
ASSERT_GE(perf_ctx->block_read_count - perf_ctx->index_block_read_count -
perf_ctx->filter_block_read_count -
perf_ctx->compression_dict_block_read_count,
1);
ASSERT_GE(perf_ctx->block_read_byte, 1);
for (const Status& status : statuses) {
ASSERT_OK(status);
}
// Check that keys are in cache after MultiGet.
for (size_t i = 0; i < keys.size(); i++) {
ASSERT_TRUE(table->TEST_KeyInCache(read_opts, keys[i]));
ASSERT_EQ(values[i].ToString(), *expected_values[i]);
}
}
TEST_P(BlockBasedTableReaderTest, NewIterator) {
Options options;
ReadOptions read_opts;
std::string dummy_ts(sizeof(uint64_t), '\0');
Slice read_timestamp = dummy_ts;
if (udt_enabled_) {
options.comparator = test::BytewiseComparatorWithU64TsWrapper();
read_opts.timestamp = &read_timestamp;
}
options.persist_user_defined_timestamps = persist_udt_;
size_t ts_sz = options.comparator->timestamp_size();
std::vector<std::pair<std::string, std::string>> kv =
BlockBasedTableReaderBaseTest::GenerateKVMap(
100 /* num_block */,
true /* mixed_with_human_readable_string_value */, ts_sz);
std::string table_name = "BlockBasedTableReaderTest_NewIterator" +
CompressionTypeToString(compression_type_);
ImmutableOptions ioptions(options);
CreateTable(table_name, ioptions, compression_type_, kv,
compression_parallel_threads_, compression_dict_bytes_);
std::unique_ptr<BlockBasedTable> table;
FileOptions foptions;
foptions.use_direct_reads = use_direct_reads_;
InternalKeyComparator comparator(options.comparator);
NewBlockBasedTableReader(foptions, ioptions, comparator, table_name, &table,
true /* bool prefetch_index_and_filter_in_cache */,
nullptr /* status */, persist_udt_);
ASSERT_OK(
table->VerifyChecksum(read_opts, TableReaderCaller::kUserVerifyChecksum));
std::unique_ptr<InternalIterator> iter;
iter.reset(table->NewIterator(
read_opts, options_.prefix_extractor.get(), /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized));
// Test forward scan.
ASSERT_TRUE(!iter->Valid());
iter->SeekToFirst();
ASSERT_OK(iter->status());
for (auto kv_iter = kv.begin(); kv_iter != kv.end(); kv_iter++) {
ASSERT_EQ(iter->key().ToString(), kv_iter->first);
ASSERT_EQ(iter->value().ToString(), kv_iter->second);
iter->Next();
ASSERT_OK(iter->status());
}
ASSERT_TRUE(!iter->Valid());
ASSERT_OK(iter->status());
// Test backward scan.
iter->SeekToLast();
ASSERT_OK(iter->status());
for (auto kv_iter = kv.rbegin(); kv_iter != kv.rend(); kv_iter++) {
ASSERT_EQ(iter->key().ToString(), kv_iter->first);
ASSERT_EQ(iter->value().ToString(), kv_iter->second);
iter->Prev();
ASSERT_OK(iter->status());
}
ASSERT_TRUE(!iter->Valid());
ASSERT_OK(iter->status());
}
class ChargeTableReaderTest
: public BlockBasedTableReaderBaseTest,
public testing::WithParamInterface<
CacheEntryRoleOptions::Decision /* charge_table_reader_mem */> {
protected:
static std::size_t CalculateMaxTableReaderNumBeforeCacheFull(
std::size_t cache_capacity, std::size_t approx_table_reader_mem) {
// To make calculation easier for testing
assert(cache_capacity % CacheReservationManagerImpl<
CacheEntryRole::kBlockBasedTableReader>::
GetDummyEntrySize() ==
0 &&
cache_capacity >= 2 * CacheReservationManagerImpl<
CacheEntryRole::kBlockBasedTableReader>::
GetDummyEntrySize());
// We need to subtract 1 for max_num_dummy_entry to account for dummy
// entries' overhead, assumed the overhead is no greater than 1 dummy entry
// size
std::size_t max_num_dummy_entry =
(size_t)std::floor((
1.0 * cache_capacity /
CacheReservationManagerImpl<
CacheEntryRole::kBlockBasedTableReader>::GetDummyEntrySize())) -
1;
std::size_t cache_capacity_rounded_to_dummy_entry_multiples =
max_num_dummy_entry *
CacheReservationManagerImpl<
CacheEntryRole::kBlockBasedTableReader>::GetDummyEntrySize();
std::size_t max_table_reader_num_capped = static_cast<std::size_t>(
std::floor(1.0 * cache_capacity_rounded_to_dummy_entry_multiples /
approx_table_reader_mem));
return max_table_reader_num_capped;
}
void SetUp() override {
// To cache and re-use the same kv map and compression type in the test
// suite for elimiating variance caused by these two factors
kv_ = BlockBasedTableReaderBaseTest::GenerateKVMap();
compression_type_ = CompressionType::kNoCompression;
table_reader_charge_tracking_cache_ = std::make_shared<
TargetCacheChargeTrackingCache<
CacheEntryRole::kBlockBasedTableReader>>((NewLRUCache(
4 * CacheReservationManagerImpl<
CacheEntryRole::kBlockBasedTableReader>::GetDummyEntrySize(),
0 /* num_shard_bits */, true /* strict_capacity_limit */)));
// To ApproximateTableReaderMem() without being affected by
// the feature of charging its memory, we turn off the feature
charge_table_reader_ = CacheEntryRoleOptions::Decision::kDisabled;
BlockBasedTableReaderBaseTest::SetUp();
approx_table_reader_mem_ = ApproximateTableReaderMem();
// Now we condtionally turn on the feature to test
charge_table_reader_ = GetParam();
ConfigureTableFactory();
}
void ConfigureTableFactory() override {
BlockBasedTableOptions table_options;
table_options.cache_usage_options.options_overrides.insert(
{CacheEntryRole::kBlockBasedTableReader,
{/*.charged = */ charge_table_reader_}});
table_options.block_cache = table_reader_charge_tracking_cache_;
table_options.cache_index_and_filter_blocks = false;
table_options.filter_policy.reset(NewBloomFilterPolicy(10, false));
table_options.partition_filters = true;
table_options.index_type = BlockBasedTableOptions::kTwoLevelIndexSearch;
options_.table_factory.reset(NewBlockBasedTableFactory(table_options));
}
CacheEntryRoleOptions::Decision charge_table_reader_;
std::shared_ptr<
TargetCacheChargeTrackingCache<CacheEntryRole::kBlockBasedTableReader>>
table_reader_charge_tracking_cache_;
std::size_t approx_table_reader_mem_;
std::vector<std::pair<std::string, std::string>> kv_;
CompressionType compression_type_;
private:
std::size_t ApproximateTableReaderMem() {
std::size_t approx_table_reader_mem = 0;
std::string table_name = "table_for_approx_table_reader_mem";
ImmutableOptions ioptions(options_);
CreateTable(table_name, ioptions, compression_type_, kv_);
std::unique_ptr<BlockBasedTable> table;
Status s;
NewBlockBasedTableReader(
FileOptions(), ImmutableOptions(options_),
InternalKeyComparator(options_.comparator), table_name, &table,
false /* prefetch_index_and_filter_in_cache */, &s);
assert(s.ok());
approx_table_reader_mem = table->ApproximateMemoryUsage();
assert(approx_table_reader_mem > 0);
return approx_table_reader_mem;
}
};
INSTANTIATE_TEST_CASE_P(
ChargeTableReaderTest, ChargeTableReaderTest,
::testing::Values(CacheEntryRoleOptions::Decision::kEnabled,
CacheEntryRoleOptions::Decision::kDisabled));
TEST_P(ChargeTableReaderTest, Basic) {
const std::size_t max_table_reader_num_capped =
ChargeTableReaderTest::CalculateMaxTableReaderNumBeforeCacheFull(
table_reader_charge_tracking_cache_->GetCapacity(),
approx_table_reader_mem_);
// Acceptable estimtation errors coming from
// 1. overstimate max_table_reader_num_capped due to # dummy entries is high
// and results in metadata charge overhead greater than 1 dummy entry size
// (violating our assumption in calculating max_table_reader_num_capped)
// 2. overestimate/underestimate max_table_reader_num_capped due to the gap
// between ApproximateTableReaderMem() and actual table reader mem
std::size_t max_table_reader_num_capped_upper_bound =
(std::size_t)(max_table_reader_num_capped * 1.05);
std::size_t max_table_reader_num_capped_lower_bound =
(std::size_t)(max_table_reader_num_capped * 0.95);
std::size_t max_table_reader_num_uncapped =
(std::size_t)(max_table_reader_num_capped * 1.1);
ASSERT_GT(max_table_reader_num_uncapped,
max_table_reader_num_capped_upper_bound)
<< "We need `max_table_reader_num_uncapped` > "
"`max_table_reader_num_capped_upper_bound` to differentiate cases "
"between "
"charge_table_reader_ == kDisabled and == kEnabled)";
Status s = Status::OK();
std::size_t opened_table_reader_num = 0;
std::string table_name;
std::vector<std::unique_ptr<BlockBasedTable>> tables;
ImmutableOptions ioptions(options_);
// Keep creating BlockBasedTableReader till hiting the memory limit based on
// cache capacity and creation fails (when charge_table_reader_ ==
// kEnabled) or reaching a specfied big number of table readers (when
// charge_table_reader_ == kDisabled)
while (s.ok() && opened_table_reader_num < max_table_reader_num_uncapped) {
table_name = "table_" + std::to_string(opened_table_reader_num);
CreateTable(table_name, ioptions, compression_type_, kv_);
tables.push_back(std::unique_ptr<BlockBasedTable>());
NewBlockBasedTableReader(
FileOptions(), ImmutableOptions(options_),
InternalKeyComparator(options_.comparator), table_name, &tables.back(),
false /* prefetch_index_and_filter_in_cache */, &s);
if (s.ok()) {
++opened_table_reader_num;
}
}
if (charge_table_reader_ == CacheEntryRoleOptions::Decision::kEnabled) {
EXPECT_TRUE(s.IsMemoryLimit()) << "s: " << s.ToString();
EXPECT_TRUE(s.ToString().find(
kCacheEntryRoleToCamelString[static_cast<std::uint32_t>(
CacheEntryRole::kBlockBasedTableReader)]) !=
std::string::npos);
EXPECT_TRUE(s.ToString().find("memory limit based on cache capacity") !=
std::string::npos);
EXPECT_GE(opened_table_reader_num, max_table_reader_num_capped_lower_bound);
EXPECT_LE(opened_table_reader_num, max_table_reader_num_capped_upper_bound);
std::size_t updated_max_table_reader_num_capped =
ChargeTableReaderTest::CalculateMaxTableReaderNumBeforeCacheFull(
table_reader_charge_tracking_cache_->GetCapacity() / 2,
approx_table_reader_mem_);
// Keep deleting BlockBasedTableReader to lower down memory usage from the
// memory limit to make the next creation succeeds
while (opened_table_reader_num >= updated_max_table_reader_num_capped) {
tables.pop_back();
--opened_table_reader_num;
}
table_name = "table_for_successful_table_reader_open";
CreateTable(table_name, ioptions, compression_type_, kv_);
tables.push_back(std::unique_ptr<BlockBasedTable>());
NewBlockBasedTableReader(
FileOptions(), ImmutableOptions(options_),
InternalKeyComparator(options_.comparator), table_name, &tables.back(),
false /* prefetch_index_and_filter_in_cache */, &s);
EXPECT_TRUE(s.ok()) << s.ToString();
tables.clear();
EXPECT_EQ(table_reader_charge_tracking_cache_->GetCacheCharge(), 0);
} else {
EXPECT_TRUE(s.ok() &&
opened_table_reader_num == max_table_reader_num_uncapped)
<< "s: " << s.ToString() << " opened_table_reader_num: "
<< std::to_string(opened_table_reader_num);
EXPECT_EQ(table_reader_charge_tracking_cache_->GetCacheCharge(), 0);
}
}
class BlockBasedTableReaderTestVerifyChecksum
: public BlockBasedTableReaderTest {
public:
BlockBasedTableReaderTestVerifyChecksum() : BlockBasedTableReaderTest() {}
};
TEST_P(BlockBasedTableReaderTestVerifyChecksum, ChecksumMismatch) {
Options options;
ReadOptions read_opts;
std::string dummy_ts(sizeof(uint64_t), '\0');
Slice read_timestamp = dummy_ts;
if (udt_enabled_) {
options.comparator = test::BytewiseComparatorWithU64TsWrapper();
read_opts.timestamp = &read_timestamp;
}
options.persist_user_defined_timestamps = persist_udt_;
size_t ts_sz = options.comparator->timestamp_size();
std::vector<std::pair<std::string, std::string>> kv =
BlockBasedTableReaderBaseTest::GenerateKVMap(
800 /* num_block */,
false /* mixed_with_human_readable_string_value=*/, ts_sz);
options.statistics = CreateDBStatistics();
ImmutableOptions ioptions(options);
std::string table_name =
"BlockBasedTableReaderTest" + CompressionTypeToString(compression_type_);
CreateTable(table_name, ioptions, compression_type_, kv,
compression_parallel_threads_, compression_dict_bytes_);
std::unique_ptr<BlockBasedTable> table;
FileOptions foptions;
foptions.use_direct_reads = use_direct_reads_;
InternalKeyComparator comparator(options.comparator);
NewBlockBasedTableReader(foptions, ioptions, comparator, table_name, &table,
true /* bool prefetch_index_and_filter_in_cache */,
nullptr /* status */, persist_udt_);
// Use the top level iterator to find the offset/size of the first
// 2nd level index block and corrupt the block
IndexBlockIter iiter_on_stack;
BlockCacheLookupContext context{TableReaderCaller::kUserVerifyChecksum};
InternalIteratorBase<IndexValue>* iiter = table->NewIndexIterator(
read_opts, /*need_upper_bound_check=*/false, &iiter_on_stack,
/*get_context=*/nullptr, &context);
std::unique_ptr<InternalIteratorBase<IndexValue>> iiter_unique_ptr;
if (iiter != &iiter_on_stack) {
iiter_unique_ptr = std::unique_ptr<InternalIteratorBase<IndexValue>>(iiter);
}
ASSERT_OK(iiter->status());
iiter->SeekToFirst();
BlockHandle handle = static_cast<PartitionedIndexIterator*>(iiter)
->index_iter_->value()
.handle;
table.reset();
// Corrupt the block pointed to by handle
ASSERT_OK(test::CorruptFile(options.env, Path(table_name),
static_cast<int>(handle.offset()), 128));
NewBlockBasedTableReader(foptions, ioptions, comparator, table_name, &table,
true /* bool prefetch_index_and_filter_in_cache */,
nullptr /* status */, persist_udt_);
ASSERT_EQ(0,
options.statistics->getTickerCount(BLOCK_CHECKSUM_MISMATCH_COUNT));
Status s =
table->VerifyChecksum(read_opts, TableReaderCaller::kUserVerifyChecksum);
ASSERT_EQ(1,
options.statistics->getTickerCount(BLOCK_CHECKSUM_MISMATCH_COUNT));
ASSERT_EQ(s.code(), Status::kCorruption);
}
// Param 1: compression type
// Param 2: whether to use direct reads
// Param 3: Block Based Table Index type, partitioned filters are also enabled
// when index type is kTwoLevelIndexSearch
// Param 4: BBTO no_block_cache option
// Param 5: test mode for the user-defined timestamp feature
// Param 6: number of parallel compression threads
// Param 7: CompressionOptions.max_dict_bytes and
// CompressionOptions.max_dict_buffer_bytes. This enable/disables
// compression dictionary.
// Param 8: test mode to specify the pattern for generating key / value pairs.
INSTANTIATE_TEST_CASE_P(
BlockBasedTableReaderTest, BlockBasedTableReaderTest,
::testing::Combine(
::testing::ValuesIn(GetSupportedCompressions()), ::testing::Bool(),
::testing::Values(
BlockBasedTableOptions::IndexType::kBinarySearch,
BlockBasedTableOptions::IndexType::kHashSearch,
BlockBasedTableOptions::IndexType::kTwoLevelIndexSearch,
BlockBasedTableOptions::IndexType::kBinarySearchWithFirstKey),
::testing::Values(false), ::testing::ValuesIn(test::GetUDTTestModes()),
::testing::Values(1, 2), ::testing::Values(0, 4096),
::testing::Values(false)));
INSTANTIATE_TEST_CASE_P(
BlockBasedTableReaderGetTest, BlockBasedTableReaderGetTest,
::testing::Combine(
::testing::ValuesIn(GetSupportedCompressions()), ::testing::Bool(),
::testing::Values(
BlockBasedTableOptions::IndexType::kBinarySearch,
BlockBasedTableOptions::IndexType::kHashSearch,
BlockBasedTableOptions::IndexType::kTwoLevelIndexSearch,
BlockBasedTableOptions::IndexType::kBinarySearchWithFirstKey),
::testing::Values(false), ::testing::ValuesIn(test::GetUDTTestModes()),
::testing::Values(1, 2), ::testing::Values(0, 4096),
::testing::Values(false, true)));
INSTANTIATE_TEST_CASE_P(
VerifyChecksum, BlockBasedTableReaderTestVerifyChecksum,
::testing::Combine(
::testing::ValuesIn(GetSupportedCompressions()),
::testing::Values(false),
::testing::Values(
BlockBasedTableOptions::IndexType::kTwoLevelIndexSearch),
::testing::Values(true), ::testing::ValuesIn(test::GetUDTTestModes()),
::testing::Values(1, 2), ::testing::Values(0),
::testing::Values(false)));
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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