fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
579 lines
22 KiB
579 lines
22 KiB
// 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 <cstdlib>
|
|
#include "cache/lru_cache.h"
|
|
#include "db/db_test_util.h"
|
|
#include "port/stack_trace.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
class DBBlockCacheTest : public DBTestBase {
|
|
private:
|
|
size_t miss_count_ = 0;
|
|
size_t hit_count_ = 0;
|
|
size_t insert_count_ = 0;
|
|
size_t failure_count_ = 0;
|
|
size_t compressed_miss_count_ = 0;
|
|
size_t compressed_hit_count_ = 0;
|
|
size_t compressed_insert_count_ = 0;
|
|
size_t compressed_failure_count_ = 0;
|
|
|
|
public:
|
|
const size_t kNumBlocks = 10;
|
|
const size_t kValueSize = 100;
|
|
|
|
DBBlockCacheTest() : DBTestBase("/db_block_cache_test") {}
|
|
|
|
BlockBasedTableOptions GetTableOptions() {
|
|
BlockBasedTableOptions table_options;
|
|
// Set a small enough block size so that each key-value get its own block.
|
|
table_options.block_size = 1;
|
|
return table_options;
|
|
}
|
|
|
|
Options GetOptions(const BlockBasedTableOptions& table_options) {
|
|
Options options = CurrentOptions();
|
|
options.create_if_missing = true;
|
|
options.avoid_flush_during_recovery = false;
|
|
// options.compression = kNoCompression;
|
|
options.statistics = rocksdb::CreateDBStatistics();
|
|
options.table_factory.reset(new BlockBasedTableFactory(table_options));
|
|
return options;
|
|
}
|
|
|
|
void InitTable(const Options& options) {
|
|
std::string value(kValueSize, 'a');
|
|
for (size_t i = 0; i < kNumBlocks; i++) {
|
|
ASSERT_OK(Put(ToString(i), value.c_str()));
|
|
}
|
|
}
|
|
|
|
void RecordCacheCounters(const Options& options) {
|
|
miss_count_ = TestGetTickerCount(options, BLOCK_CACHE_MISS);
|
|
hit_count_ = TestGetTickerCount(options, BLOCK_CACHE_HIT);
|
|
insert_count_ = TestGetTickerCount(options, BLOCK_CACHE_ADD);
|
|
failure_count_ = TestGetTickerCount(options, BLOCK_CACHE_ADD_FAILURES);
|
|
compressed_miss_count_ =
|
|
TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_MISS);
|
|
compressed_hit_count_ =
|
|
TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_HIT);
|
|
compressed_insert_count_ =
|
|
TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_ADD);
|
|
compressed_failure_count_ =
|
|
TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_ADD_FAILURES);
|
|
}
|
|
|
|
void CheckCacheCounters(const Options& options, size_t expected_misses,
|
|
size_t expected_hits, size_t expected_inserts,
|
|
size_t expected_failures) {
|
|
size_t new_miss_count = TestGetTickerCount(options, BLOCK_CACHE_MISS);
|
|
size_t new_hit_count = TestGetTickerCount(options, BLOCK_CACHE_HIT);
|
|
size_t new_insert_count = TestGetTickerCount(options, BLOCK_CACHE_ADD);
|
|
size_t new_failure_count =
|
|
TestGetTickerCount(options, BLOCK_CACHE_ADD_FAILURES);
|
|
ASSERT_EQ(miss_count_ + expected_misses, new_miss_count);
|
|
ASSERT_EQ(hit_count_ + expected_hits, new_hit_count);
|
|
ASSERT_EQ(insert_count_ + expected_inserts, new_insert_count);
|
|
ASSERT_EQ(failure_count_ + expected_failures, new_failure_count);
|
|
miss_count_ = new_miss_count;
|
|
hit_count_ = new_hit_count;
|
|
insert_count_ = new_insert_count;
|
|
failure_count_ = new_failure_count;
|
|
}
|
|
|
|
void CheckCompressedCacheCounters(const Options& options,
|
|
size_t expected_misses,
|
|
size_t expected_hits,
|
|
size_t expected_inserts,
|
|
size_t expected_failures) {
|
|
size_t new_miss_count =
|
|
TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_MISS);
|
|
size_t new_hit_count =
|
|
TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_HIT);
|
|
size_t new_insert_count =
|
|
TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_ADD);
|
|
size_t new_failure_count =
|
|
TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_ADD_FAILURES);
|
|
ASSERT_EQ(compressed_miss_count_ + expected_misses, new_miss_count);
|
|
ASSERT_EQ(compressed_hit_count_ + expected_hits, new_hit_count);
|
|
ASSERT_EQ(compressed_insert_count_ + expected_inserts, new_insert_count);
|
|
ASSERT_EQ(compressed_failure_count_ + expected_failures, new_failure_count);
|
|
compressed_miss_count_ = new_miss_count;
|
|
compressed_hit_count_ = new_hit_count;
|
|
compressed_insert_count_ = new_insert_count;
|
|
compressed_failure_count_ = new_failure_count;
|
|
}
|
|
};
|
|
|
|
TEST_F(DBBlockCacheTest, TestWithoutCompressedBlockCache) {
|
|
ReadOptions read_options;
|
|
auto table_options = GetTableOptions();
|
|
auto options = GetOptions(table_options);
|
|
InitTable(options);
|
|
|
|
std::shared_ptr<Cache> cache = NewLRUCache(0, 0, false);
|
|
table_options.block_cache = cache;
|
|
options.table_factory.reset(new BlockBasedTableFactory(table_options));
|
|
Reopen(options);
|
|
RecordCacheCounters(options);
|
|
|
|
std::vector<std::unique_ptr<Iterator>> iterators(kNumBlocks - 1);
|
|
Iterator* iter = nullptr;
|
|
|
|
// Load blocks into cache.
|
|
for (size_t i = 0; i < kNumBlocks - 1; i++) {
|
|
iter = db_->NewIterator(read_options);
|
|
iter->Seek(ToString(i));
|
|
ASSERT_OK(iter->status());
|
|
CheckCacheCounters(options, 1, 0, 1, 0);
|
|
iterators[i].reset(iter);
|
|
}
|
|
size_t usage = cache->GetUsage();
|
|
ASSERT_LT(0, usage);
|
|
cache->SetCapacity(usage);
|
|
ASSERT_EQ(usage, cache->GetPinnedUsage());
|
|
|
|
// Test with strict capacity limit.
|
|
cache->SetStrictCapacityLimit(true);
|
|
iter = db_->NewIterator(read_options);
|
|
iter->Seek(ToString(kNumBlocks - 1));
|
|
ASSERT_TRUE(iter->status().IsIncomplete());
|
|
CheckCacheCounters(options, 1, 0, 0, 1);
|
|
delete iter;
|
|
iter = nullptr;
|
|
|
|
// Release interators and access cache again.
|
|
for (size_t i = 0; i < kNumBlocks - 1; i++) {
|
|
iterators[i].reset();
|
|
CheckCacheCounters(options, 0, 0, 0, 0);
|
|
}
|
|
ASSERT_EQ(0, cache->GetPinnedUsage());
|
|
for (size_t i = 0; i < kNumBlocks - 1; i++) {
|
|
iter = db_->NewIterator(read_options);
|
|
iter->Seek(ToString(i));
|
|
ASSERT_OK(iter->status());
|
|
CheckCacheCounters(options, 0, 1, 0, 0);
|
|
iterators[i].reset(iter);
|
|
}
|
|
}
|
|
|
|
#ifdef SNAPPY
|
|
TEST_F(DBBlockCacheTest, TestWithCompressedBlockCache) {
|
|
ReadOptions read_options;
|
|
auto table_options = GetTableOptions();
|
|
auto options = GetOptions(table_options);
|
|
options.compression = CompressionType::kSnappyCompression;
|
|
InitTable(options);
|
|
|
|
std::shared_ptr<Cache> cache = NewLRUCache(0, 0, false);
|
|
std::shared_ptr<Cache> compressed_cache = NewLRUCache(1 << 25, 0, false);
|
|
table_options.block_cache = cache;
|
|
table_options.block_cache_compressed = compressed_cache;
|
|
options.table_factory.reset(new BlockBasedTableFactory(table_options));
|
|
Reopen(options);
|
|
RecordCacheCounters(options);
|
|
|
|
std::vector<std::unique_ptr<Iterator>> iterators(kNumBlocks - 1);
|
|
Iterator* iter = nullptr;
|
|
|
|
// Load blocks into cache.
|
|
for (size_t i = 0; i < kNumBlocks - 1; i++) {
|
|
iter = db_->NewIterator(read_options);
|
|
iter->Seek(ToString(i));
|
|
ASSERT_OK(iter->status());
|
|
CheckCacheCounters(options, 1, 0, 1, 0);
|
|
CheckCompressedCacheCounters(options, 1, 0, 1, 0);
|
|
iterators[i].reset(iter);
|
|
}
|
|
size_t usage = cache->GetUsage();
|
|
ASSERT_LT(0, usage);
|
|
ASSERT_EQ(usage, cache->GetPinnedUsage());
|
|
size_t compressed_usage = compressed_cache->GetUsage();
|
|
ASSERT_LT(0, compressed_usage);
|
|
// Compressed block cache cannot be pinned.
|
|
ASSERT_EQ(0, compressed_cache->GetPinnedUsage());
|
|
|
|
// Set strict capacity limit flag. Now block will only load into compressed
|
|
// block cache.
|
|
cache->SetCapacity(usage);
|
|
cache->SetStrictCapacityLimit(true);
|
|
ASSERT_EQ(usage, cache->GetPinnedUsage());
|
|
iter = db_->NewIterator(read_options);
|
|
iter->Seek(ToString(kNumBlocks - 1));
|
|
ASSERT_TRUE(iter->status().IsIncomplete());
|
|
CheckCacheCounters(options, 1, 0, 0, 1);
|
|
CheckCompressedCacheCounters(options, 1, 0, 1, 0);
|
|
delete iter;
|
|
iter = nullptr;
|
|
|
|
// Clear strict capacity limit flag. This time we shall hit compressed block
|
|
// cache.
|
|
cache->SetStrictCapacityLimit(false);
|
|
iter = db_->NewIterator(read_options);
|
|
iter->Seek(ToString(kNumBlocks - 1));
|
|
ASSERT_OK(iter->status());
|
|
CheckCacheCounters(options, 1, 0, 1, 0);
|
|
CheckCompressedCacheCounters(options, 0, 1, 0, 0);
|
|
delete iter;
|
|
iter = nullptr;
|
|
}
|
|
#endif // SNAPPY
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
|
|
// Make sure that when options.block_cache is set, after a new table is
|
|
// created its index/filter blocks are added to block cache.
|
|
TEST_F(DBBlockCacheTest, IndexAndFilterBlocksOfNewTableAddedToCache) {
|
|
Options options = CurrentOptions();
|
|
options.create_if_missing = true;
|
|
options.statistics = rocksdb::CreateDBStatistics();
|
|
BlockBasedTableOptions table_options;
|
|
table_options.cache_index_and_filter_blocks = true;
|
|
table_options.filter_policy.reset(NewBloomFilterPolicy(20));
|
|
options.table_factory.reset(new BlockBasedTableFactory(table_options));
|
|
CreateAndReopenWithCF({"pikachu"}, options);
|
|
|
|
ASSERT_OK(Put(1, "key", "val"));
|
|
// Create a new table.
|
|
ASSERT_OK(Flush(1));
|
|
|
|
// index/filter blocks added to block cache right after table creation.
|
|
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_INDEX_MISS));
|
|
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_FILTER_MISS));
|
|
ASSERT_EQ(2, /* only index/filter were added */
|
|
TestGetTickerCount(options, BLOCK_CACHE_ADD));
|
|
ASSERT_EQ(0, TestGetTickerCount(options, BLOCK_CACHE_DATA_MISS));
|
|
uint64_t int_num;
|
|
ASSERT_TRUE(
|
|
dbfull()->GetIntProperty("rocksdb.estimate-table-readers-mem", &int_num));
|
|
ASSERT_EQ(int_num, 0U);
|
|
|
|
// Make sure filter block is in cache.
|
|
std::string value;
|
|
ReadOptions ropt;
|
|
db_->KeyMayExist(ReadOptions(), handles_[1], "key", &value);
|
|
|
|
// Miss count should remain the same.
|
|
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_FILTER_MISS));
|
|
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_FILTER_HIT));
|
|
|
|
db_->KeyMayExist(ReadOptions(), handles_[1], "key", &value);
|
|
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_FILTER_MISS));
|
|
ASSERT_EQ(2, TestGetTickerCount(options, BLOCK_CACHE_FILTER_HIT));
|
|
|
|
// Make sure index block is in cache.
|
|
auto index_block_hit = TestGetTickerCount(options, BLOCK_CACHE_INDEX_HIT);
|
|
value = Get(1, "key");
|
|
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_INDEX_MISS));
|
|
ASSERT_EQ(index_block_hit + 1,
|
|
TestGetTickerCount(options, BLOCK_CACHE_INDEX_HIT));
|
|
|
|
value = Get(1, "key");
|
|
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_INDEX_MISS));
|
|
ASSERT_EQ(index_block_hit + 2,
|
|
TestGetTickerCount(options, BLOCK_CACHE_INDEX_HIT));
|
|
}
|
|
|
|
TEST_F(DBBlockCacheTest, IndexAndFilterBlocksStats) {
|
|
Options options = CurrentOptions();
|
|
options.create_if_missing = true;
|
|
options.statistics = rocksdb::CreateDBStatistics();
|
|
BlockBasedTableOptions table_options;
|
|
table_options.cache_index_and_filter_blocks = true;
|
|
// 200 bytes are enough to hold the first two blocks
|
|
std::shared_ptr<Cache> cache = NewLRUCache(200, 0, false);
|
|
table_options.block_cache = cache;
|
|
table_options.filter_policy.reset(NewBloomFilterPolicy(20));
|
|
options.table_factory.reset(new BlockBasedTableFactory(table_options));
|
|
CreateAndReopenWithCF({"pikachu"}, options);
|
|
|
|
ASSERT_OK(Put(1, "key", "val"));
|
|
// Create a new table
|
|
ASSERT_OK(Flush(1));
|
|
size_t index_bytes_insert =
|
|
TestGetTickerCount(options, BLOCK_CACHE_INDEX_BYTES_INSERT);
|
|
size_t filter_bytes_insert =
|
|
TestGetTickerCount(options, BLOCK_CACHE_FILTER_BYTES_INSERT);
|
|
ASSERT_GT(index_bytes_insert, 0);
|
|
ASSERT_GT(filter_bytes_insert, 0);
|
|
ASSERT_EQ(cache->GetUsage(), index_bytes_insert + filter_bytes_insert);
|
|
// set the cache capacity to the current usage
|
|
cache->SetCapacity(index_bytes_insert + filter_bytes_insert);
|
|
ASSERT_EQ(TestGetTickerCount(options, BLOCK_CACHE_INDEX_BYTES_EVICT), 0);
|
|
ASSERT_EQ(TestGetTickerCount(options, BLOCK_CACHE_FILTER_BYTES_EVICT), 0);
|
|
ASSERT_OK(Put(1, "key2", "val"));
|
|
// Create a new table
|
|
ASSERT_OK(Flush(1));
|
|
// cache evicted old index and block entries
|
|
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_INDEX_BYTES_INSERT),
|
|
index_bytes_insert);
|
|
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_FILTER_BYTES_INSERT),
|
|
filter_bytes_insert);
|
|
ASSERT_EQ(TestGetTickerCount(options, BLOCK_CACHE_INDEX_BYTES_EVICT),
|
|
index_bytes_insert);
|
|
ASSERT_EQ(TestGetTickerCount(options, BLOCK_CACHE_FILTER_BYTES_EVICT),
|
|
filter_bytes_insert);
|
|
}
|
|
|
|
namespace {
|
|
|
|
// A mock cache wraps LRUCache, and record how many entries have been
|
|
// inserted for each priority.
|
|
class MockCache : public LRUCache {
|
|
public:
|
|
static uint32_t high_pri_insert_count;
|
|
static uint32_t low_pri_insert_count;
|
|
|
|
MockCache() : LRUCache(1 << 25, 0, false, 0.0) {}
|
|
|
|
virtual Status Insert(const Slice& key, void* value, size_t charge,
|
|
void (*deleter)(const Slice& key, void* value),
|
|
Handle** handle, Priority priority) override {
|
|
if (priority == Priority::LOW) {
|
|
low_pri_insert_count++;
|
|
} else {
|
|
high_pri_insert_count++;
|
|
}
|
|
return LRUCache::Insert(key, value, charge, deleter, handle, priority);
|
|
}
|
|
};
|
|
|
|
uint32_t MockCache::high_pri_insert_count = 0;
|
|
uint32_t MockCache::low_pri_insert_count = 0;
|
|
|
|
} // anonymous namespace
|
|
|
|
TEST_F(DBBlockCacheTest, IndexAndFilterBlocksCachePriority) {
|
|
for (auto priority : {Cache::Priority::LOW, Cache::Priority::HIGH}) {
|
|
Options options = CurrentOptions();
|
|
options.create_if_missing = true;
|
|
options.statistics = rocksdb::CreateDBStatistics();
|
|
BlockBasedTableOptions table_options;
|
|
table_options.cache_index_and_filter_blocks = true;
|
|
table_options.block_cache.reset(new MockCache());
|
|
table_options.filter_policy.reset(NewBloomFilterPolicy(20));
|
|
table_options.cache_index_and_filter_blocks_with_high_priority =
|
|
priority == Cache::Priority::HIGH ? true : false;
|
|
options.table_factory.reset(new BlockBasedTableFactory(table_options));
|
|
DestroyAndReopen(options);
|
|
|
|
MockCache::high_pri_insert_count = 0;
|
|
MockCache::low_pri_insert_count = 0;
|
|
|
|
// Create a new table.
|
|
ASSERT_OK(Put("foo", "value"));
|
|
ASSERT_OK(Put("bar", "value"));
|
|
ASSERT_OK(Flush());
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(0));
|
|
|
|
// index/filter blocks added to block cache right after table creation.
|
|
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_INDEX_MISS));
|
|
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_FILTER_MISS));
|
|
ASSERT_EQ(2, /* only index/filter were added */
|
|
TestGetTickerCount(options, BLOCK_CACHE_ADD));
|
|
ASSERT_EQ(0, TestGetTickerCount(options, BLOCK_CACHE_DATA_MISS));
|
|
if (priority == Cache::Priority::LOW) {
|
|
ASSERT_EQ(0, MockCache::high_pri_insert_count);
|
|
ASSERT_EQ(2, MockCache::low_pri_insert_count);
|
|
} else {
|
|
ASSERT_EQ(2, MockCache::high_pri_insert_count);
|
|
ASSERT_EQ(0, MockCache::low_pri_insert_count);
|
|
}
|
|
|
|
// Access data block.
|
|
ASSERT_EQ("value", Get("foo"));
|
|
|
|
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_INDEX_MISS));
|
|
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_FILTER_MISS));
|
|
ASSERT_EQ(3, /*adding data block*/
|
|
TestGetTickerCount(options, BLOCK_CACHE_ADD));
|
|
ASSERT_EQ(1, TestGetTickerCount(options, BLOCK_CACHE_DATA_MISS));
|
|
|
|
// Data block should be inserted with low priority.
|
|
if (priority == Cache::Priority::LOW) {
|
|
ASSERT_EQ(0, MockCache::high_pri_insert_count);
|
|
ASSERT_EQ(3, MockCache::low_pri_insert_count);
|
|
} else {
|
|
ASSERT_EQ(2, MockCache::high_pri_insert_count);
|
|
ASSERT_EQ(1, MockCache::low_pri_insert_count);
|
|
}
|
|
}
|
|
}
|
|
|
|
TEST_F(DBBlockCacheTest, ParanoidFileChecks) {
|
|
Options options = CurrentOptions();
|
|
options.create_if_missing = true;
|
|
options.statistics = rocksdb::CreateDBStatistics();
|
|
options.level0_file_num_compaction_trigger = 2;
|
|
options.paranoid_file_checks = true;
|
|
BlockBasedTableOptions table_options;
|
|
table_options.cache_index_and_filter_blocks = false;
|
|
table_options.filter_policy.reset(NewBloomFilterPolicy(20));
|
|
options.table_factory.reset(new BlockBasedTableFactory(table_options));
|
|
CreateAndReopenWithCF({"pikachu"}, options);
|
|
|
|
ASSERT_OK(Put(1, "1_key", "val"));
|
|
ASSERT_OK(Put(1, "9_key", "val"));
|
|
// Create a new table.
|
|
ASSERT_OK(Flush(1));
|
|
ASSERT_EQ(1, /* read and cache data block */
|
|
TestGetTickerCount(options, BLOCK_CACHE_ADD));
|
|
|
|
ASSERT_OK(Put(1, "1_key2", "val2"));
|
|
ASSERT_OK(Put(1, "9_key2", "val2"));
|
|
// Create a new SST file. This will further trigger a compaction
|
|
// and generate another file.
|
|
ASSERT_OK(Flush(1));
|
|
dbfull()->TEST_WaitForCompact();
|
|
ASSERT_EQ(3, /* Totally 3 files created up to now */
|
|
TestGetTickerCount(options, BLOCK_CACHE_ADD));
|
|
|
|
// After disabling options.paranoid_file_checks. NO further block
|
|
// is added after generating a new file.
|
|
ASSERT_OK(
|
|
dbfull()->SetOptions(handles_[1], {{"paranoid_file_checks", "false"}}));
|
|
|
|
ASSERT_OK(Put(1, "1_key3", "val3"));
|
|
ASSERT_OK(Put(1, "9_key3", "val3"));
|
|
ASSERT_OK(Flush(1));
|
|
ASSERT_OK(Put(1, "1_key4", "val4"));
|
|
ASSERT_OK(Put(1, "9_key4", "val4"));
|
|
ASSERT_OK(Flush(1));
|
|
dbfull()->TEST_WaitForCompact();
|
|
ASSERT_EQ(3, /* Totally 3 files created up to now */
|
|
TestGetTickerCount(options, BLOCK_CACHE_ADD));
|
|
}
|
|
|
|
TEST_F(DBBlockCacheTest, CompressedCache) {
|
|
if (!Snappy_Supported()) {
|
|
return;
|
|
}
|
|
int num_iter = 80;
|
|
|
|
// Run this test three iterations.
|
|
// Iteration 1: only a uncompressed block cache
|
|
// Iteration 2: only a compressed block cache
|
|
// Iteration 3: both block cache and compressed cache
|
|
// Iteration 4: both block cache and compressed cache, but DB is not
|
|
// compressed
|
|
for (int iter = 0; iter < 4; iter++) {
|
|
Options options = CurrentOptions();
|
|
options.write_buffer_size = 64 * 1024; // small write buffer
|
|
options.statistics = rocksdb::CreateDBStatistics();
|
|
|
|
BlockBasedTableOptions table_options;
|
|
switch (iter) {
|
|
case 0:
|
|
// only uncompressed block cache
|
|
table_options.block_cache = NewLRUCache(8 * 1024);
|
|
table_options.block_cache_compressed = nullptr;
|
|
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
|
|
break;
|
|
case 1:
|
|
// no block cache, only compressed cache
|
|
table_options.no_block_cache = true;
|
|
table_options.block_cache = nullptr;
|
|
table_options.block_cache_compressed = NewLRUCache(8 * 1024);
|
|
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
|
|
break;
|
|
case 2:
|
|
// both compressed and uncompressed block cache
|
|
table_options.block_cache = NewLRUCache(1024);
|
|
table_options.block_cache_compressed = NewLRUCache(8 * 1024);
|
|
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
|
|
break;
|
|
case 3:
|
|
// both block cache and compressed cache, but DB is not compressed
|
|
// also, make block cache sizes bigger, to trigger block cache hits
|
|
table_options.block_cache = NewLRUCache(1024 * 1024);
|
|
table_options.block_cache_compressed = NewLRUCache(8 * 1024 * 1024);
|
|
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
|
|
options.compression = kNoCompression;
|
|
break;
|
|
default:
|
|
ASSERT_TRUE(false);
|
|
}
|
|
CreateAndReopenWithCF({"pikachu"}, options);
|
|
// default column family doesn't have block cache
|
|
Options no_block_cache_opts;
|
|
no_block_cache_opts.statistics = options.statistics;
|
|
no_block_cache_opts = CurrentOptions(no_block_cache_opts);
|
|
BlockBasedTableOptions table_options_no_bc;
|
|
table_options_no_bc.no_block_cache = true;
|
|
no_block_cache_opts.table_factory.reset(
|
|
NewBlockBasedTableFactory(table_options_no_bc));
|
|
ReopenWithColumnFamilies(
|
|
{"default", "pikachu"},
|
|
std::vector<Options>({no_block_cache_opts, options}));
|
|
|
|
Random rnd(301);
|
|
|
|
// Write 8MB (80 values, each 100K)
|
|
ASSERT_EQ(NumTableFilesAtLevel(0, 1), 0);
|
|
std::vector<std::string> values;
|
|
std::string str;
|
|
for (int i = 0; i < num_iter; i++) {
|
|
if (i % 4 == 0) { // high compression ratio
|
|
str = RandomString(&rnd, 1000);
|
|
}
|
|
values.push_back(str);
|
|
ASSERT_OK(Put(1, Key(i), values[i]));
|
|
}
|
|
|
|
// flush all data from memtable so that reads are from block cache
|
|
ASSERT_OK(Flush(1));
|
|
|
|
for (int i = 0; i < num_iter; i++) {
|
|
ASSERT_EQ(Get(1, Key(i)), values[i]);
|
|
}
|
|
|
|
// check that we triggered the appropriate code paths in the cache
|
|
switch (iter) {
|
|
case 0:
|
|
// only uncompressed block cache
|
|
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_MISS), 0);
|
|
ASSERT_EQ(TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_MISS), 0);
|
|
break;
|
|
case 1:
|
|
// no block cache, only compressed cache
|
|
ASSERT_EQ(TestGetTickerCount(options, BLOCK_CACHE_MISS), 0);
|
|
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_MISS), 0);
|
|
break;
|
|
case 2:
|
|
// both compressed and uncompressed block cache
|
|
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_MISS), 0);
|
|
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_MISS), 0);
|
|
break;
|
|
case 3:
|
|
// both compressed and uncompressed block cache
|
|
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_MISS), 0);
|
|
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_HIT), 0);
|
|
ASSERT_GT(TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_MISS), 0);
|
|
// compressed doesn't have any hits since blocks are not compressed on
|
|
// storage
|
|
ASSERT_EQ(TestGetTickerCount(options, BLOCK_CACHE_COMPRESSED_HIT), 0);
|
|
break;
|
|
default:
|
|
ASSERT_TRUE(false);
|
|
}
|
|
|
|
options.create_if_missing = true;
|
|
DestroyAndReopen(options);
|
|
}
|
|
}
|
|
|
|
#endif // ROCKSDB_LITE
|
|
|
|
} // namespace rocksdb
|
|
|
|
int main(int argc, char** argv) {
|
|
rocksdb::port::InstallStackTraceHandler();
|
|
::testing::InitGoogleTest(&argc, argv);
|
|
return RUN_ALL_TESTS();
|
|
}
|
|
|