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https://github.com/facebook/rocksdb.git
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5f025ea832
Summary: This is groundwork for adding garbage collection support to BlobDB. The patch adds logic that keeps track of the oldest blob file referred to by each SST file. The oldest blob file is identified during flush/ compaction (similarly to how the range of keys covered by the SST is identified), and persisted in the manifest as a custom field of the new file edit record. Blob indexes with TTL are ignored for the purposes of identifying the oldest blob file (since such blob files are cleaned up by the TTL logic in BlobDB). Pull Request resolved: https://github.com/facebook/rocksdb/pull/5903 Test Plan: Added new unit tests; also ran db_bench in BlobDB mode, inspected the manifest using ldb, and confirmed (by scanning the SST files using sst_dump) that the value of the oldest blob file number field matches the contents of the file for each SST. Differential Revision: D17859997 Pulled By: ltamasi fbshipit-source-id: 21662c137c6259a6af70446faaf3a9912c550e90
318 lines
11 KiB
C++
318 lines
11 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#include <string>
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#include "db/version_edit.h"
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#include "db/version_set.h"
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#include "logging/logging.h"
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#include "test_util/testharness.h"
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#include "test_util/testutil.h"
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#include "util/string_util.h"
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namespace rocksdb {
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class VersionBuilderTest : public testing::Test {
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public:
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const Comparator* ucmp_;
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InternalKeyComparator icmp_;
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Options options_;
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ImmutableCFOptions ioptions_;
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MutableCFOptions mutable_cf_options_;
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VersionStorageInfo vstorage_;
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uint32_t file_num_;
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CompactionOptionsFIFO fifo_options_;
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std::vector<uint64_t> size_being_compacted_;
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VersionBuilderTest()
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: ucmp_(BytewiseComparator()),
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icmp_(ucmp_),
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ioptions_(options_),
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mutable_cf_options_(options_),
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vstorage_(&icmp_, ucmp_, options_.num_levels, kCompactionStyleLevel,
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nullptr, false),
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file_num_(1) {
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mutable_cf_options_.RefreshDerivedOptions(ioptions_);
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size_being_compacted_.resize(options_.num_levels);
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}
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~VersionBuilderTest() override {
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for (int i = 0; i < vstorage_.num_levels(); i++) {
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for (auto* f : vstorage_.LevelFiles(i)) {
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if (--f->refs == 0) {
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delete f;
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}
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}
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}
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}
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InternalKey GetInternalKey(const char* ukey,
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SequenceNumber smallest_seq = 100) {
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return InternalKey(ukey, smallest_seq, kTypeValue);
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}
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void Add(int level, uint32_t file_number, const char* smallest,
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const char* largest, uint64_t file_size = 0, uint32_t path_id = 0,
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SequenceNumber smallest_seq = 100, SequenceNumber largest_seq = 100,
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uint64_t num_entries = 0, uint64_t num_deletions = 0,
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bool sampled = false, SequenceNumber smallest_seqno = 0,
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SequenceNumber largest_seqno = 0) {
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assert(level < vstorage_.num_levels());
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FileMetaData* f = new FileMetaData(
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file_number, path_id, file_size, GetInternalKey(smallest, smallest_seq),
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GetInternalKey(largest, largest_seq), smallest_seqno, largest_seqno,
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/* marked_for_compact */ false, kInvalidBlobFileNumber);
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f->compensated_file_size = file_size;
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f->num_entries = num_entries;
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f->num_deletions = num_deletions;
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vstorage_.AddFile(level, f);
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if (sampled) {
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f->init_stats_from_file = true;
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vstorage_.UpdateAccumulatedStats(f);
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}
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}
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void UpdateVersionStorageInfo() {
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vstorage_.UpdateFilesByCompactionPri(ioptions_.compaction_pri);
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vstorage_.UpdateNumNonEmptyLevels();
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vstorage_.GenerateFileIndexer();
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vstorage_.GenerateLevelFilesBrief();
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vstorage_.CalculateBaseBytes(ioptions_, mutable_cf_options_);
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vstorage_.GenerateLevel0NonOverlapping();
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vstorage_.SetFinalized();
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}
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};
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void UnrefFilesInVersion(VersionStorageInfo* new_vstorage) {
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for (int i = 0; i < new_vstorage->num_levels(); i++) {
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for (auto* f : new_vstorage->LevelFiles(i)) {
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if (--f->refs == 0) {
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delete f;
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}
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}
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}
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}
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TEST_F(VersionBuilderTest, ApplyAndSaveTo) {
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Add(0, 1U, "150", "200", 100U);
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Add(1, 66U, "150", "200", 100U);
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Add(1, 88U, "201", "300", 100U);
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Add(2, 6U, "150", "179", 100U);
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Add(2, 7U, "180", "220", 100U);
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Add(2, 8U, "221", "300", 100U);
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Add(3, 26U, "150", "170", 100U);
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Add(3, 27U, "171", "179", 100U);
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Add(3, 28U, "191", "220", 100U);
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Add(3, 29U, "221", "300", 100U);
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UpdateVersionStorageInfo();
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VersionEdit version_edit;
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version_edit.AddFile(2, 666, 0, 100U, GetInternalKey("301"),
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GetInternalKey("350"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_edit.DeleteFile(3, 27U);
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EnvOptions env_options;
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VersionBuilder version_builder(env_options, nullptr, &vstorage_);
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VersionStorageInfo new_vstorage(&icmp_, ucmp_, options_.num_levels,
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kCompactionStyleLevel, nullptr, false);
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version_builder.Apply(&version_edit);
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version_builder.SaveTo(&new_vstorage);
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ASSERT_EQ(400U, new_vstorage.NumLevelBytes(2));
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ASSERT_EQ(300U, new_vstorage.NumLevelBytes(3));
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UnrefFilesInVersion(&new_vstorage);
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}
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TEST_F(VersionBuilderTest, ApplyAndSaveToDynamic) {
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ioptions_.level_compaction_dynamic_level_bytes = true;
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Add(0, 1U, "150", "200", 100U, 0, 200U, 200U, 0, 0, false, 200U, 200U);
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Add(0, 88U, "201", "300", 100U, 0, 100U, 100U, 0, 0, false, 100U, 100U);
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Add(4, 6U, "150", "179", 100U);
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Add(4, 7U, "180", "220", 100U);
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Add(4, 8U, "221", "300", 100U);
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Add(5, 26U, "150", "170", 100U);
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Add(5, 27U, "171", "179", 100U);
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UpdateVersionStorageInfo();
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VersionEdit version_edit;
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version_edit.AddFile(3, 666, 0, 100U, GetInternalKey("301"),
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GetInternalKey("350"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_edit.DeleteFile(0, 1U);
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version_edit.DeleteFile(0, 88U);
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EnvOptions env_options;
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VersionBuilder version_builder(env_options, nullptr, &vstorage_);
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VersionStorageInfo new_vstorage(&icmp_, ucmp_, options_.num_levels,
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kCompactionStyleLevel, nullptr, false);
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version_builder.Apply(&version_edit);
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version_builder.SaveTo(&new_vstorage);
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ASSERT_EQ(0U, new_vstorage.NumLevelBytes(0));
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ASSERT_EQ(100U, new_vstorage.NumLevelBytes(3));
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ASSERT_EQ(300U, new_vstorage.NumLevelBytes(4));
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ASSERT_EQ(200U, new_vstorage.NumLevelBytes(5));
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UnrefFilesInVersion(&new_vstorage);
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}
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TEST_F(VersionBuilderTest, ApplyAndSaveToDynamic2) {
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ioptions_.level_compaction_dynamic_level_bytes = true;
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Add(0, 1U, "150", "200", 100U, 0, 200U, 200U, 0, 0, false, 200U, 200U);
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Add(0, 88U, "201", "300", 100U, 0, 100U, 100U, 0, 0, false, 100U, 100U);
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Add(4, 6U, "150", "179", 100U);
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Add(4, 7U, "180", "220", 100U);
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Add(4, 8U, "221", "300", 100U);
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Add(5, 26U, "150", "170", 100U);
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Add(5, 27U, "171", "179", 100U);
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UpdateVersionStorageInfo();
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VersionEdit version_edit;
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version_edit.AddFile(4, 666, 0, 100U, GetInternalKey("301"),
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GetInternalKey("350"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_edit.DeleteFile(0, 1U);
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version_edit.DeleteFile(0, 88U);
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version_edit.DeleteFile(4, 6U);
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version_edit.DeleteFile(4, 7U);
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version_edit.DeleteFile(4, 8U);
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EnvOptions env_options;
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VersionBuilder version_builder(env_options, nullptr, &vstorage_);
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VersionStorageInfo new_vstorage(&icmp_, ucmp_, options_.num_levels,
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kCompactionStyleLevel, nullptr, false);
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version_builder.Apply(&version_edit);
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version_builder.SaveTo(&new_vstorage);
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ASSERT_EQ(0U, new_vstorage.NumLevelBytes(0));
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ASSERT_EQ(100U, new_vstorage.NumLevelBytes(4));
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ASSERT_EQ(200U, new_vstorage.NumLevelBytes(5));
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UnrefFilesInVersion(&new_vstorage);
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}
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TEST_F(VersionBuilderTest, ApplyMultipleAndSaveTo) {
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UpdateVersionStorageInfo();
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VersionEdit version_edit;
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version_edit.AddFile(2, 666, 0, 100U, GetInternalKey("301"),
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GetInternalKey("350"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_edit.AddFile(2, 676, 0, 100U, GetInternalKey("401"),
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GetInternalKey("450"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_edit.AddFile(2, 636, 0, 100U, GetInternalKey("601"),
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GetInternalKey("650"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_edit.AddFile(2, 616, 0, 100U, GetInternalKey("501"),
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GetInternalKey("550"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_edit.AddFile(2, 606, 0, 100U, GetInternalKey("701"),
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GetInternalKey("750"), 200, 200, false,
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kInvalidBlobFileNumber);
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EnvOptions env_options;
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VersionBuilder version_builder(env_options, nullptr, &vstorage_);
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VersionStorageInfo new_vstorage(&icmp_, ucmp_, options_.num_levels,
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kCompactionStyleLevel, nullptr, false);
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version_builder.Apply(&version_edit);
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version_builder.SaveTo(&new_vstorage);
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ASSERT_EQ(500U, new_vstorage.NumLevelBytes(2));
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UnrefFilesInVersion(&new_vstorage);
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}
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TEST_F(VersionBuilderTest, ApplyDeleteAndSaveTo) {
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UpdateVersionStorageInfo();
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EnvOptions env_options;
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VersionBuilder version_builder(env_options, nullptr, &vstorage_);
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VersionStorageInfo new_vstorage(&icmp_, ucmp_, options_.num_levels,
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kCompactionStyleLevel, nullptr, false);
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VersionEdit version_edit;
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version_edit.AddFile(2, 666, 0, 100U, GetInternalKey("301"),
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GetInternalKey("350"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_edit.AddFile(2, 676, 0, 100U, GetInternalKey("401"),
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GetInternalKey("450"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_edit.AddFile(2, 636, 0, 100U, GetInternalKey("601"),
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GetInternalKey("650"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_edit.AddFile(2, 616, 0, 100U, GetInternalKey("501"),
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GetInternalKey("550"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_edit.AddFile(2, 606, 0, 100U, GetInternalKey("701"),
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GetInternalKey("750"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_builder.Apply(&version_edit);
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VersionEdit version_edit2;
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version_edit.AddFile(2, 808, 0, 100U, GetInternalKey("901"),
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GetInternalKey("950"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_edit2.DeleteFile(2, 616);
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version_edit2.DeleteFile(2, 636);
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version_edit.AddFile(2, 806, 0, 100U, GetInternalKey("801"),
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GetInternalKey("850"), 200, 200, false,
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kInvalidBlobFileNumber);
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version_builder.Apply(&version_edit2);
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version_builder.SaveTo(&new_vstorage);
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ASSERT_EQ(300U, new_vstorage.NumLevelBytes(2));
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UnrefFilesInVersion(&new_vstorage);
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}
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TEST_F(VersionBuilderTest, EstimatedActiveKeys) {
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const uint32_t kTotalSamples = 20;
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const uint32_t kNumLevels = 5;
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const uint32_t kFilesPerLevel = 8;
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const uint32_t kNumFiles = kNumLevels * kFilesPerLevel;
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const uint32_t kEntriesPerFile = 1000;
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const uint32_t kDeletionsPerFile = 100;
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for (uint32_t i = 0; i < kNumFiles; ++i) {
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Add(static_cast<int>(i / kFilesPerLevel), i + 1,
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ToString((i + 100) * 1000).c_str(),
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ToString((i + 100) * 1000 + 999).c_str(),
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100U, 0, 100, 100,
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kEntriesPerFile, kDeletionsPerFile,
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(i < kTotalSamples));
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}
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// minus 2X for the number of deletion entries because:
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// 1x for deletion entry does not count as a data entry.
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// 1x for each deletion entry will actually remove one data entry.
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ASSERT_EQ(vstorage_.GetEstimatedActiveKeys(),
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(kEntriesPerFile - 2 * kDeletionsPerFile) * kNumFiles);
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}
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} // namespace rocksdb
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int main(int argc, char** argv) {
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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