c43a37a922
Summary: Return early in case there are zero data blocks when `BlockBasedTableBuilder::EnterUnbuffered()` is called. This crash can only be triggered by applying dictionary compression to SST files that contain only range tombstones. It cannot be triggered by a low buffer limit alone since we only consider entering unbuffered mode after buffering a data block causing the limit to be breached, or `Finish()`ing the file. It also cannot be triggered by a totally empty file because those go through `Abandon()` rather than `Finish()` so unbuffered mode is never entered. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8141 Test Plan: added a unit test that repro'd the "Floating point exception" Reviewed By: riversand963 Differential Revision: D27495640 Pulled By: ajkr fbshipit-source-id: a463cfba476919dc5c5c380800a75a86c31ffa23
1704 lines
66 KiB
C++
1704 lines
66 KiB
C++
// Copyright (c) 2016-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 "db/db_test_util.h"
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#include "port/stack_trace.h"
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#include "rocksdb/utilities/write_batch_with_index.h"
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#include "test_util/testutil.h"
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#include "util/random.h"
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#include "utilities/merge_operators.h"
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namespace ROCKSDB_NAMESPACE {
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class DBRangeDelTest : public DBTestBase {
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public:
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DBRangeDelTest() : DBTestBase("/db_range_del_test", /*env_do_fsync=*/false) {}
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std::string GetNumericStr(int key) {
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uint64_t uint64_key = static_cast<uint64_t>(key);
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std::string str;
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str.resize(8);
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memcpy(&str[0], static_cast<void*>(&uint64_key), 8);
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return str;
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}
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};
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// PlainTableFactory, WriteBatchWithIndex, and NumTableFilesAtLevel() are not
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// supported in ROCKSDB_LITE
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#ifndef ROCKSDB_LITE
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TEST_F(DBRangeDelTest, NonBlockBasedTableNotSupported) {
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// TODO: figure out why MmapReads trips the iterator pinning assertion in
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// RangeDelAggregator. Ideally it would be supported; otherwise it should at
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// least be explicitly unsupported.
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for (auto config : {kPlainTableAllBytesPrefix, /* kWalDirAndMmapReads */}) {
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option_config_ = config;
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DestroyAndReopen(CurrentOptions());
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ASSERT_TRUE(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
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"dr1", "dr1")
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.IsNotSupported());
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}
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}
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TEST_F(DBRangeDelTest, WriteBatchWithIndexNotSupported) {
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WriteBatchWithIndex indexedBatch{};
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ASSERT_TRUE(indexedBatch.DeleteRange(db_->DefaultColumnFamily(), "dr1", "dr1")
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.IsNotSupported());
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ASSERT_TRUE(indexedBatch.DeleteRange("dr1", "dr1").IsNotSupported());
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}
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TEST_F(DBRangeDelTest, EndSameAsStartCoversNothing) {
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ASSERT_OK(db_->Put(WriteOptions(), "b", "val"));
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ASSERT_OK(
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db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "b", "b"));
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ASSERT_EQ("val", Get("b"));
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}
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TEST_F(DBRangeDelTest, EndComesBeforeStartInvalidArgument) {
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ASSERT_OK(db_->Put(WriteOptions(), "b", "val"));
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ASSERT_TRUE(
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db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "b", "a")
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.IsInvalidArgument());
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ASSERT_EQ("val", Get("b"));
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}
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TEST_F(DBRangeDelTest, FlushOutputHasOnlyRangeTombstones) {
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do {
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DestroyAndReopen(CurrentOptions());
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ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
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"dr1", "dr2"));
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ASSERT_OK(db_->Flush(FlushOptions()));
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ASSERT_EQ(1, NumTableFilesAtLevel(0));
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} while (ChangeOptions(kRangeDelSkipConfigs));
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}
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TEST_F(DBRangeDelTest, DictionaryCompressionWithOnlyRangeTombstones) {
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Options opts = CurrentOptions();
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opts.compression_opts.max_dict_bytes = 16384;
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Reopen(opts);
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ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "dr1",
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"dr2"));
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ASSERT_OK(db_->Flush(FlushOptions()));
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}
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TEST_F(DBRangeDelTest, CompactionOutputHasOnlyRangeTombstone) {
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do {
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Options opts = CurrentOptions();
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opts.disable_auto_compactions = true;
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opts.statistics = CreateDBStatistics();
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DestroyAndReopen(opts);
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// snapshot protects range tombstone from dropping due to becoming obsolete.
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const Snapshot* snapshot = db_->GetSnapshot();
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ASSERT_OK(
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db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "z"));
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ASSERT_OK(db_->Flush(FlushOptions()));
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ASSERT_EQ(1, NumTableFilesAtLevel(0));
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ASSERT_EQ(0, NumTableFilesAtLevel(1));
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ASSERT_OK(dbfull()->TEST_CompactRange(0, nullptr, nullptr, nullptr,
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true /* disallow_trivial_move */));
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ASSERT_EQ(0, NumTableFilesAtLevel(0));
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ASSERT_EQ(1, NumTableFilesAtLevel(1));
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ASSERT_EQ(0, TestGetTickerCount(opts, COMPACTION_RANGE_DEL_DROP_OBSOLETE));
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db_->ReleaseSnapshot(snapshot);
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// Skip cuckoo memtables, which do not support snapshots. Skip non-leveled
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// compactions as the above assertions about the number of files in a level
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// do not hold true.
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} while (ChangeOptions(kRangeDelSkipConfigs | kSkipUniversalCompaction |
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kSkipFIFOCompaction));
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}
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TEST_F(DBRangeDelTest, CompactionOutputFilesExactlyFilled) {
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// regression test for exactly filled compaction output files. Previously
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// another file would be generated containing all range deletions, which
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// could invalidate the non-overlapping file boundary invariant.
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const int kNumPerFile = 4, kNumFiles = 2, kFileBytes = 9 << 10;
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Options options = CurrentOptions();
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options.disable_auto_compactions = true;
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options.level0_file_num_compaction_trigger = kNumFiles;
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options.memtable_factory.reset(new SpecialSkipListFactory(kNumPerFile));
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options.num_levels = 2;
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options.target_file_size_base = kFileBytes;
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BlockBasedTableOptions table_options;
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table_options.block_size_deviation = 50; // each block holds two keys
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options.table_factory.reset(NewBlockBasedTableFactory(table_options));
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Reopen(options);
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// snapshot protects range tombstone from dropping due to becoming obsolete.
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const Snapshot* snapshot = db_->GetSnapshot();
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ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), Key(0),
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Key(1)));
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Random rnd(301);
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for (int i = 0; i < kNumFiles; ++i) {
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std::vector<std::string> values;
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// Write 12K (4 values, each 3K)
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for (int j = 0; j < kNumPerFile; j++) {
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values.push_back(rnd.RandomString(3 << 10));
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ASSERT_OK(Put(Key(i * kNumPerFile + j), values[j]));
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if (j == 0 && i > 0) {
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ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
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}
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}
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}
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// put extra key to trigger final flush
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ASSERT_OK(Put("", ""));
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ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
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ASSERT_EQ(kNumFiles, NumTableFilesAtLevel(0));
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ASSERT_EQ(0, NumTableFilesAtLevel(1));
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ASSERT_OK(dbfull()->TEST_CompactRange(0, nullptr, nullptr, nullptr,
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true /* disallow_trivial_move */));
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ASSERT_EQ(0, NumTableFilesAtLevel(0));
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ASSERT_EQ(2, NumTableFilesAtLevel(1));
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db_->ReleaseSnapshot(snapshot);
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}
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TEST_F(DBRangeDelTest, MaxCompactionBytesCutsOutputFiles) {
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// Ensures range deletion spanning multiple compaction output files that are
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// cut by max_compaction_bytes will have non-overlapping key-ranges.
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// https://github.com/facebook/rocksdb/issues/1778
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const int kNumFiles = 2, kNumPerFile = 1 << 8, kBytesPerVal = 1 << 12;
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Options opts = CurrentOptions();
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opts.comparator = test::Uint64Comparator();
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opts.disable_auto_compactions = true;
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opts.level0_file_num_compaction_trigger = kNumFiles;
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opts.max_compaction_bytes = kNumPerFile * kBytesPerVal;
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opts.memtable_factory.reset(new SpecialSkipListFactory(kNumPerFile));
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// Want max_compaction_bytes to trigger the end of compaction output file, not
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// target_file_size_base, so make the latter much bigger
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opts.target_file_size_base = 100 * opts.max_compaction_bytes;
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DestroyAndReopen(opts);
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// snapshot protects range tombstone from dropping due to becoming obsolete.
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const Snapshot* snapshot = db_->GetSnapshot();
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// It spans the whole key-range, thus will be included in all output files
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ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
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GetNumericStr(0),
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GetNumericStr(kNumFiles * kNumPerFile - 1)));
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Random rnd(301);
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for (int i = 0; i < kNumFiles; ++i) {
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std::vector<std::string> values;
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// Write 1MB (256 values, each 4K)
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for (int j = 0; j < kNumPerFile; j++) {
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values.push_back(rnd.RandomString(kBytesPerVal));
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ASSERT_OK(Put(GetNumericStr(kNumPerFile * i + j), values[j]));
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}
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// extra entry to trigger SpecialSkipListFactory's flush
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ASSERT_OK(Put(GetNumericStr(kNumPerFile), ""));
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ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
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ASSERT_EQ(i + 1, NumTableFilesAtLevel(0));
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}
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ASSERT_OK(dbfull()->TEST_CompactRange(0, nullptr, nullptr, nullptr,
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true /* disallow_trivial_move */));
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ASSERT_EQ(0, NumTableFilesAtLevel(0));
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ASSERT_GE(NumTableFilesAtLevel(1), 2);
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std::vector<std::vector<FileMetaData>> files;
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dbfull()->TEST_GetFilesMetaData(db_->DefaultColumnFamily(), &files);
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for (size_t i = 0; i + 1 < files[1].size(); ++i) {
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ASSERT_TRUE(InternalKeyComparator(opts.comparator)
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.Compare(files[1][i].largest, files[1][i + 1].smallest) <
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0);
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}
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db_->ReleaseSnapshot(snapshot);
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}
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TEST_F(DBRangeDelTest, SentinelsOmittedFromOutputFile) {
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// Regression test for bug where sentinel range deletions (i.e., ones with
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// sequence number of zero) were included in output files.
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// snapshot protects range tombstone from dropping due to becoming obsolete.
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const Snapshot* snapshot = db_->GetSnapshot();
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// gaps between ranges creates sentinels in our internal representation
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std::vector<std::pair<std::string, std::string>> range_dels = {{"a", "b"}, {"c", "d"}, {"e", "f"}};
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for (const auto& range_del : range_dels) {
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ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
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range_del.first, range_del.second));
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}
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ASSERT_OK(db_->Flush(FlushOptions()));
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ASSERT_EQ(1, NumTableFilesAtLevel(0));
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std::vector<std::vector<FileMetaData>> files;
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dbfull()->TEST_GetFilesMetaData(db_->DefaultColumnFamily(), &files);
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ASSERT_GT(files[0][0].fd.smallest_seqno, 0);
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db_->ReleaseSnapshot(snapshot);
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}
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TEST_F(DBRangeDelTest, FlushRangeDelsSameStartKey) {
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ASSERT_OK(db_->Put(WriteOptions(), "b1", "val"));
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ASSERT_OK(
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db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "c"));
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ASSERT_OK(db_->Put(WriteOptions(), "b2", "val"));
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ASSERT_OK(
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db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "b"));
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// first iteration verifies query correctness in memtable, second verifies
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// query correctness for a single SST file
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for (int i = 0; i < 2; ++i) {
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if (i > 0) {
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ASSERT_OK(db_->Flush(FlushOptions()));
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ASSERT_EQ(1, NumTableFilesAtLevel(0));
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}
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std::string value;
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ASSERT_TRUE(db_->Get(ReadOptions(), "b1", &value).IsNotFound());
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ASSERT_OK(db_->Get(ReadOptions(), "b2", &value));
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}
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}
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TEST_F(DBRangeDelTest, CompactRangeDelsSameStartKey) {
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ASSERT_OK(db_->Put(WriteOptions(), "unused",
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"val")); // prevents empty after compaction
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ASSERT_OK(db_->Put(WriteOptions(), "b1", "val"));
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ASSERT_OK(db_->Flush(FlushOptions()));
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ASSERT_OK(
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db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "c"));
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ASSERT_OK(db_->Flush(FlushOptions()));
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ASSERT_OK(
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db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "b"));
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ASSERT_OK(db_->Flush(FlushOptions()));
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ASSERT_EQ(3, NumTableFilesAtLevel(0));
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for (int i = 0; i < 2; ++i) {
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if (i > 0) {
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ASSERT_OK(dbfull()->TEST_CompactRange(0, nullptr, nullptr, nullptr,
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true /* disallow_trivial_move */));
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ASSERT_EQ(0, NumTableFilesAtLevel(0));
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ASSERT_EQ(1, NumTableFilesAtLevel(1));
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}
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std::string value;
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ASSERT_TRUE(db_->Get(ReadOptions(), "b1", &value).IsNotFound());
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}
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}
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#endif // ROCKSDB_LITE
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TEST_F(DBRangeDelTest, FlushRemovesCoveredKeys) {
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const int kNum = 300, kRangeBegin = 50, kRangeEnd = 250;
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Options opts = CurrentOptions();
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opts.comparator = test::Uint64Comparator();
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DestroyAndReopen(opts);
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// Write a third before snapshot, a third between snapshot and tombstone, and
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// a third after the tombstone. Keys older than snapshot or newer than the
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// tombstone should be preserved.
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const Snapshot* snapshot = nullptr;
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for (int i = 0; i < kNum; ++i) {
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if (i == kNum / 3) {
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snapshot = db_->GetSnapshot();
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} else if (i == 2 * kNum / 3) {
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ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
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GetNumericStr(kRangeBegin),
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GetNumericStr(kRangeEnd)));
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}
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ASSERT_OK(db_->Put(WriteOptions(), GetNumericStr(i), "val"));
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}
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ASSERT_OK(db_->Flush(FlushOptions()));
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for (int i = 0; i < kNum; ++i) {
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ReadOptions read_opts;
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read_opts.ignore_range_deletions = true;
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std::string value;
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if (i < kRangeBegin || i > kRangeEnd || i < kNum / 3 || i >= 2 * kNum / 3) {
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ASSERT_OK(db_->Get(read_opts, GetNumericStr(i), &value));
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} else {
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ASSERT_TRUE(db_->Get(read_opts, GetNumericStr(i), &value).IsNotFound());
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}
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}
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db_->ReleaseSnapshot(snapshot);
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}
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// NumTableFilesAtLevel() is not supported in ROCKSDB_LITE
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#ifndef ROCKSDB_LITE
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TEST_F(DBRangeDelTest, CompactionRemovesCoveredKeys) {
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const int kNumPerFile = 100, kNumFiles = 4;
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Options opts = CurrentOptions();
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opts.comparator = test::Uint64Comparator();
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opts.disable_auto_compactions = true;
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opts.memtable_factory.reset(new SpecialSkipListFactory(kNumPerFile));
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opts.num_levels = 2;
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opts.statistics = CreateDBStatistics();
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DestroyAndReopen(opts);
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for (int i = 0; i < kNumFiles; ++i) {
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if (i > 0) {
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// range tombstone covers first half of the previous file
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ASSERT_OK(db_->DeleteRange(
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WriteOptions(), db_->DefaultColumnFamily(),
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GetNumericStr((i - 1) * kNumPerFile),
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GetNumericStr((i - 1) * kNumPerFile + kNumPerFile / 2)));
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}
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// Make sure a given key appears in each file so compaction won't be able to
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// use trivial move, which would happen if the ranges were non-overlapping.
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// Also, we need an extra element since flush is only triggered when the
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// number of keys is one greater than SpecialSkipListFactory's limit.
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// We choose a key outside the key-range used by the test to avoid conflict.
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ASSERT_OK(db_->Put(WriteOptions(), GetNumericStr(kNumPerFile * kNumFiles),
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"val"));
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for (int j = 0; j < kNumPerFile; ++j) {
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ASSERT_OK(
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db_->Put(WriteOptions(), GetNumericStr(i * kNumPerFile + j), "val"));
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}
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ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
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ASSERT_EQ(i + 1, NumTableFilesAtLevel(0));
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}
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ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
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ASSERT_EQ(0, NumTableFilesAtLevel(0));
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ASSERT_GT(NumTableFilesAtLevel(1), 0);
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ASSERT_EQ((kNumFiles - 1) * kNumPerFile / 2,
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TestGetTickerCount(opts, COMPACTION_KEY_DROP_RANGE_DEL));
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for (int i = 0; i < kNumFiles; ++i) {
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for (int j = 0; j < kNumPerFile; ++j) {
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ReadOptions read_opts;
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read_opts.ignore_range_deletions = true;
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std::string value;
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if (i == kNumFiles - 1 || j >= kNumPerFile / 2) {
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ASSERT_OK(
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db_->Get(read_opts, GetNumericStr(i * kNumPerFile + j), &value));
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} else {
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ASSERT_TRUE(
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db_->Get(read_opts, GetNumericStr(i * kNumPerFile + j), &value)
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.IsNotFound());
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}
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}
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}
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}
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TEST_F(DBRangeDelTest, ValidLevelSubcompactionBoundaries) {
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const int kNumPerFile = 100, kNumFiles = 4, kFileBytes = 100 << 10;
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Options options = CurrentOptions();
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options.disable_auto_compactions = true;
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options.level0_file_num_compaction_trigger = kNumFiles;
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options.max_bytes_for_level_base = 2 * kFileBytes;
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options.max_subcompactions = 4;
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options.memtable_factory.reset(new SpecialSkipListFactory(kNumPerFile));
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options.num_levels = 3;
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options.target_file_size_base = kFileBytes;
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options.target_file_size_multiplier = 1;
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Reopen(options);
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Random rnd(301);
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for (int i = 0; i < 2; ++i) {
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for (int j = 0; j < kNumFiles; ++j) {
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if (i > 0) {
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// delete [95,105) in two files, [295,305) in next two
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int mid = (j + (1 - j % 2)) * kNumPerFile;
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ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
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Key(mid - 5), Key(mid + 5)));
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}
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std::vector<std::string> values;
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// Write 100KB (100 values, each 1K)
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for (int k = 0; k < kNumPerFile; k++) {
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values.push_back(rnd.RandomString(990));
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ASSERT_OK(Put(Key(j * kNumPerFile + k), values[k]));
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}
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// put extra key to trigger flush
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ASSERT_OK(Put("", ""));
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ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
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if (j < kNumFiles - 1) {
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// background compaction may happen early for kNumFiles'th file
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ASSERT_EQ(NumTableFilesAtLevel(0), j + 1);
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}
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if (j == options.level0_file_num_compaction_trigger - 1) {
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// When i == 1, compaction will output some files to L1, at which point
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// L1 is not bottommost so range deletions cannot be compacted away. The
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// new L1 files must be generated with non-overlapping key ranges even
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// though multiple subcompactions see the same ranges deleted, else an
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// assertion will fail.
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//
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// Only enable auto-compactions when we're ready; otherwise, the
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// oversized L0 (relative to base_level) causes the compaction to run
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|
// earlier.
|
|
ASSERT_OK(db_->EnableAutoCompaction({db_->DefaultColumnFamily()}));
|
|
ASSERT_OK(dbfull()->TEST_WaitForCompact());
|
|
ASSERT_OK(db_->SetOptions(db_->DefaultColumnFamily(),
|
|
{{"disable_auto_compactions", "true"}}));
|
|
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
|
|
ASSERT_GT(NumTableFilesAtLevel(1), 0);
|
|
ASSERT_GT(NumTableFilesAtLevel(2), 0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, ValidUniversalSubcompactionBoundaries) {
|
|
const int kNumPerFile = 100, kFilesPerLevel = 4, kNumLevels = 4;
|
|
Options options = CurrentOptions();
|
|
options.compaction_options_universal.min_merge_width = kFilesPerLevel;
|
|
options.compaction_options_universal.max_merge_width = kFilesPerLevel;
|
|
options.compaction_options_universal.size_ratio = 10;
|
|
options.compaction_style = kCompactionStyleUniversal;
|
|
options.level0_file_num_compaction_trigger = kFilesPerLevel;
|
|
options.max_subcompactions = 4;
|
|
options.memtable_factory.reset(new SpecialSkipListFactory(kNumPerFile));
|
|
options.num_levels = kNumLevels;
|
|
options.target_file_size_base = kNumPerFile << 10;
|
|
options.target_file_size_multiplier = 1;
|
|
Reopen(options);
|
|
|
|
Random rnd(301);
|
|
for (int i = 0; i < kNumLevels - 1; ++i) {
|
|
for (int j = 0; j < kFilesPerLevel; ++j) {
|
|
if (i == kNumLevels - 2) {
|
|
// insert range deletions [95,105) in two files, [295,305) in next two
|
|
// to prepare L1 for later manual compaction.
|
|
int mid = (j + (1 - j % 2)) * kNumPerFile;
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
|
|
Key(mid - 5), Key(mid + 5)));
|
|
}
|
|
std::vector<std::string> values;
|
|
// Write 100KB (100 values, each 1K)
|
|
for (int k = 0; k < kNumPerFile; k++) {
|
|
values.push_back(rnd.RandomString(990));
|
|
ASSERT_OK(Put(Key(j * kNumPerFile + k), values[k]));
|
|
}
|
|
// put extra key to trigger flush
|
|
ASSERT_OK(Put("", ""));
|
|
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
|
|
if (j < kFilesPerLevel - 1) {
|
|
// background compaction may happen early for kFilesPerLevel'th file
|
|
ASSERT_EQ(NumTableFilesAtLevel(0), j + 1);
|
|
}
|
|
}
|
|
ASSERT_OK(dbfull()->TEST_WaitForCompact());
|
|
ASSERT_EQ(NumTableFilesAtLevel(0), 0);
|
|
ASSERT_GT(NumTableFilesAtLevel(kNumLevels - 1 - i), kFilesPerLevel - 1);
|
|
}
|
|
// Now L1-L3 are full, when we compact L1->L2 we should see (1) subcompactions
|
|
// happen since input level > 0; (2) range deletions are not dropped since
|
|
// output level is not bottommost. If no file boundary assertion fails, that
|
|
// probably means universal compaction + subcompaction + range deletion are
|
|
// compatible.
|
|
ASSERT_OK(dbfull()->RunManualCompaction(
|
|
static_cast_with_check<ColumnFamilyHandleImpl>(db_->DefaultColumnFamily())
|
|
->cfd(),
|
|
1 /* input_level */, 2 /* output_level */, CompactRangeOptions(),
|
|
nullptr /* begin */, nullptr /* end */, true /* exclusive */,
|
|
true /* disallow_trivial_move */,
|
|
port::kMaxUint64 /* max_file_num_to_ignore */));
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
|
|
TEST_F(DBRangeDelTest, CompactionRemovesCoveredMergeOperands) {
|
|
const int kNumPerFile = 3, kNumFiles = 3;
|
|
Options opts = CurrentOptions();
|
|
opts.disable_auto_compactions = true;
|
|
opts.memtable_factory.reset(new SpecialSkipListFactory(2 * kNumPerFile));
|
|
opts.merge_operator = MergeOperators::CreateUInt64AddOperator();
|
|
opts.num_levels = 2;
|
|
Reopen(opts);
|
|
|
|
// Iterates kNumFiles * kNumPerFile + 1 times since flushing the last file
|
|
// requires an extra entry.
|
|
for (int i = 0; i <= kNumFiles * kNumPerFile; ++i) {
|
|
if (i % kNumPerFile == 0 && i / kNumPerFile == kNumFiles - 1) {
|
|
// Delete merge operands from all but the last file
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
|
|
"key", "key_"));
|
|
}
|
|
std::string val;
|
|
PutFixed64(&val, i);
|
|
ASSERT_OK(db_->Merge(WriteOptions(), "key", val));
|
|
// we need to prevent trivial move using Puts so compaction will actually
|
|
// process the merge operands.
|
|
ASSERT_OK(db_->Put(WriteOptions(), "prevent_trivial_move", ""));
|
|
if (i > 0 && i % kNumPerFile == 0) {
|
|
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
|
|
}
|
|
}
|
|
|
|
ReadOptions read_opts;
|
|
read_opts.ignore_range_deletions = true;
|
|
std::string expected, actual;
|
|
ASSERT_OK(db_->Get(read_opts, "key", &actual));
|
|
PutFixed64(&expected, 45); // 1+2+...+9
|
|
ASSERT_EQ(expected, actual);
|
|
|
|
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
|
|
|
|
expected.clear();
|
|
ASSERT_OK(db_->Get(read_opts, "key", &actual));
|
|
uint64_t tmp;
|
|
Slice tmp2(actual);
|
|
GetFixed64(&tmp2, &tmp);
|
|
PutFixed64(&expected, 30); // 6+7+8+9 (earlier operands covered by tombstone)
|
|
ASSERT_EQ(expected, actual);
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, PutDeleteRangeMergeFlush) {
|
|
// Test the sequence of operations: (1) Put, (2) DeleteRange, (3) Merge, (4)
|
|
// Flush. The `CompactionIterator` previously had a bug where we forgot to
|
|
// check for covering range tombstones when processing the (1) Put, causing
|
|
// it to reappear after the flush.
|
|
Options opts = CurrentOptions();
|
|
opts.merge_operator = MergeOperators::CreateUInt64AddOperator();
|
|
Reopen(opts);
|
|
|
|
std::string val;
|
|
PutFixed64(&val, 1);
|
|
ASSERT_OK(db_->Put(WriteOptions(), "key", val));
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
|
|
"key", "key_"));
|
|
ASSERT_OK(db_->Merge(WriteOptions(), "key", val));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
|
|
ReadOptions read_opts;
|
|
std::string expected, actual;
|
|
ASSERT_OK(db_->Get(read_opts, "key", &actual));
|
|
PutFixed64(&expected, 1);
|
|
ASSERT_EQ(expected, actual);
|
|
}
|
|
|
|
// NumTableFilesAtLevel() is not supported in ROCKSDB_LITE
|
|
#ifndef ROCKSDB_LITE
|
|
TEST_F(DBRangeDelTest, ObsoleteTombstoneCleanup) {
|
|
// During compaction to bottommost level, verify range tombstones older than
|
|
// the oldest snapshot are removed, while others are preserved.
|
|
Options opts = CurrentOptions();
|
|
opts.disable_auto_compactions = true;
|
|
opts.num_levels = 2;
|
|
opts.statistics = CreateDBStatistics();
|
|
Reopen(opts);
|
|
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "dr1",
|
|
"dr10")); // obsolete after compaction
|
|
ASSERT_OK(db_->Put(WriteOptions(), "key", "val"));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
const Snapshot* snapshot = db_->GetSnapshot();
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "dr2",
|
|
"dr20")); // protected by snapshot
|
|
ASSERT_OK(db_->Put(WriteOptions(), "key", "val"));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
|
|
ASSERT_EQ(2, NumTableFilesAtLevel(0));
|
|
ASSERT_EQ(0, NumTableFilesAtLevel(1));
|
|
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
|
|
ASSERT_EQ(0, NumTableFilesAtLevel(0));
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(1));
|
|
ASSERT_EQ(1, TestGetTickerCount(opts, COMPACTION_RANGE_DEL_DROP_OBSOLETE));
|
|
|
|
db_->ReleaseSnapshot(snapshot);
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, TableEvictedDuringScan) {
|
|
// The RangeDelAggregator holds pointers into range deletion blocks created by
|
|
// table readers. This test ensures the aggregator can still access those
|
|
// blocks even if it outlives the table readers that created them.
|
|
//
|
|
// DBIter always keeps readers open for L0 files. So, in order to test
|
|
// aggregator outliving reader, we need to have deletions in L1 files, which
|
|
// are opened/closed on-demand during the scan. This is accomplished by
|
|
// setting kNumRanges > level0_stop_writes_trigger, which prevents deletions
|
|
// from all lingering in L0 (there is at most one range deletion per L0 file).
|
|
//
|
|
// The first L1 file will contain a range deletion since its begin key is 0.
|
|
// SeekToFirst() references that table's reader and adds its range tombstone
|
|
// to the aggregator. Upon advancing beyond that table's key-range via Next(),
|
|
// the table reader will be unreferenced by the iterator. Since we manually
|
|
// call Evict() on all readers before the full scan, this unreference causes
|
|
// the reader's refcount to drop to zero and thus be destroyed.
|
|
//
|
|
// When it is destroyed, we do not remove its range deletions from the
|
|
// aggregator. So, subsequent calls to Next() must be able to use these
|
|
// deletions to decide whether a key is covered. This will work as long as
|
|
// the aggregator properly references the range deletion block.
|
|
const int kNum = 25, kRangeBegin = 0, kRangeEnd = 7, kNumRanges = 5;
|
|
Options opts = CurrentOptions();
|
|
opts.comparator = test::Uint64Comparator();
|
|
opts.level0_file_num_compaction_trigger = 4;
|
|
opts.level0_stop_writes_trigger = 4;
|
|
opts.memtable_factory.reset(new SpecialSkipListFactory(1));
|
|
opts.num_levels = 2;
|
|
BlockBasedTableOptions bbto;
|
|
bbto.cache_index_and_filter_blocks = true;
|
|
bbto.block_cache = NewLRUCache(8 << 20);
|
|
opts.table_factory.reset(NewBlockBasedTableFactory(bbto));
|
|
DestroyAndReopen(opts);
|
|
|
|
// Hold a snapshot so range deletions can't become obsolete during compaction
|
|
// to bottommost level (i.e., L1).
|
|
const Snapshot* snapshot = db_->GetSnapshot();
|
|
for (int i = 0; i < kNum; ++i) {
|
|
ASSERT_OK(db_->Put(WriteOptions(), GetNumericStr(i), "val"));
|
|
if (i > 0) {
|
|
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
|
|
}
|
|
if (i >= kNum / 2 && i < kNum / 2 + kNumRanges) {
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
|
|
GetNumericStr(kRangeBegin),
|
|
GetNumericStr(kRangeEnd)));
|
|
}
|
|
}
|
|
// Must be > 1 so the first L1 file can be closed before scan finishes
|
|
ASSERT_OK(dbfull()->TEST_WaitForCompact());
|
|
ASSERT_GT(NumTableFilesAtLevel(1), 1);
|
|
std::vector<uint64_t> file_numbers = ListTableFiles(env_, dbname_);
|
|
|
|
ReadOptions read_opts;
|
|
auto* iter = db_->NewIterator(read_opts);
|
|
ASSERT_OK(iter->status());
|
|
int expected = kRangeEnd;
|
|
iter->SeekToFirst();
|
|
for (auto file_number : file_numbers) {
|
|
// This puts table caches in the state of being externally referenced only
|
|
// so they are destroyed immediately upon iterator unreferencing.
|
|
TableCache::Evict(dbfull()->TEST_table_cache(), file_number);
|
|
}
|
|
for (; iter->Valid(); iter->Next()) {
|
|
ASSERT_EQ(GetNumericStr(expected), iter->key());
|
|
++expected;
|
|
// Keep clearing block cache's LRU so range deletion block can be freed as
|
|
// soon as its refcount drops to zero.
|
|
bbto.block_cache->EraseUnRefEntries();
|
|
}
|
|
ASSERT_EQ(kNum, expected);
|
|
delete iter;
|
|
db_->ReleaseSnapshot(snapshot);
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, GetCoveredKeyFromMutableMemtable) {
|
|
do {
|
|
DestroyAndReopen(CurrentOptions());
|
|
ASSERT_OK(db_->Put(WriteOptions(), "key", "val"));
|
|
ASSERT_OK(
|
|
db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "z"));
|
|
|
|
ReadOptions read_opts;
|
|
std::string value;
|
|
ASSERT_TRUE(db_->Get(read_opts, "key", &value).IsNotFound());
|
|
} while (ChangeOptions(kRangeDelSkipConfigs));
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, GetCoveredKeyFromImmutableMemtable) {
|
|
do {
|
|
Options opts = CurrentOptions();
|
|
opts.max_write_buffer_number = 3;
|
|
opts.min_write_buffer_number_to_merge = 2;
|
|
// SpecialSkipListFactory lets us specify maximum number of elements the
|
|
// memtable can hold. It switches the active memtable to immutable (flush is
|
|
// prevented by the above options) upon inserting an element that would
|
|
// overflow the memtable.
|
|
opts.memtable_factory.reset(new SpecialSkipListFactory(1));
|
|
DestroyAndReopen(opts);
|
|
|
|
ASSERT_OK(db_->Put(WriteOptions(), "key", "val"));
|
|
ASSERT_OK(
|
|
db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "z"));
|
|
ASSERT_OK(db_->Put(WriteOptions(), "blah", "val"));
|
|
|
|
ReadOptions read_opts;
|
|
std::string value;
|
|
ASSERT_TRUE(db_->Get(read_opts, "key", &value).IsNotFound());
|
|
} while (ChangeOptions(kRangeDelSkipConfigs));
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, GetCoveredKeyFromSst) {
|
|
do {
|
|
DestroyAndReopen(CurrentOptions());
|
|
ASSERT_OK(db_->Put(WriteOptions(), "key", "val"));
|
|
// snapshot prevents key from being deleted during flush
|
|
const Snapshot* snapshot = db_->GetSnapshot();
|
|
ASSERT_OK(
|
|
db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "z"));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
|
|
ReadOptions read_opts;
|
|
std::string value;
|
|
ASSERT_TRUE(db_->Get(read_opts, "key", &value).IsNotFound());
|
|
db_->ReleaseSnapshot(snapshot);
|
|
} while (ChangeOptions(kRangeDelSkipConfigs));
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, GetCoveredMergeOperandFromMemtable) {
|
|
const int kNumMergeOps = 10;
|
|
Options opts = CurrentOptions();
|
|
opts.merge_operator = MergeOperators::CreateUInt64AddOperator();
|
|
Reopen(opts);
|
|
|
|
for (int i = 0; i < kNumMergeOps; ++i) {
|
|
std::string val;
|
|
PutFixed64(&val, i);
|
|
ASSERT_OK(db_->Merge(WriteOptions(), "key", val));
|
|
if (i == kNumMergeOps / 2) {
|
|
// deletes [0, 5]
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
|
|
"key", "key_"));
|
|
}
|
|
}
|
|
|
|
ReadOptions read_opts;
|
|
std::string expected, actual;
|
|
ASSERT_OK(db_->Get(read_opts, "key", &actual));
|
|
PutFixed64(&expected, 30); // 6+7+8+9
|
|
ASSERT_EQ(expected, actual);
|
|
|
|
expected.clear();
|
|
read_opts.ignore_range_deletions = true;
|
|
ASSERT_OK(db_->Get(read_opts, "key", &actual));
|
|
PutFixed64(&expected, 45); // 0+1+2+...+9
|
|
ASSERT_EQ(expected, actual);
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, GetIgnoresRangeDeletions) {
|
|
Options opts = CurrentOptions();
|
|
opts.max_write_buffer_number = 4;
|
|
opts.min_write_buffer_number_to_merge = 3;
|
|
opts.memtable_factory.reset(new SpecialSkipListFactory(1));
|
|
Reopen(opts);
|
|
|
|
ASSERT_OK(db_->Put(WriteOptions(), "sst_key", "val"));
|
|
// snapshot prevents key from being deleted during flush
|
|
const Snapshot* snapshot = db_->GetSnapshot();
|
|
ASSERT_OK(
|
|
db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "z"));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
ASSERT_OK(db_->Put(WriteOptions(), "imm_key", "val"));
|
|
ASSERT_OK(
|
|
db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "z"));
|
|
ASSERT_OK(db_->Put(WriteOptions(), "mem_key", "val"));
|
|
ASSERT_OK(
|
|
db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "z"));
|
|
|
|
ReadOptions read_opts;
|
|
read_opts.ignore_range_deletions = true;
|
|
for (std::string key : {"sst_key", "imm_key", "mem_key"}) {
|
|
std::string value;
|
|
ASSERT_OK(db_->Get(read_opts, key, &value));
|
|
}
|
|
db_->ReleaseSnapshot(snapshot);
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, IteratorRemovesCoveredKeys) {
|
|
const int kNum = 200, kRangeBegin = 50, kRangeEnd = 150, kNumPerFile = 25;
|
|
Options opts = CurrentOptions();
|
|
opts.comparator = test::Uint64Comparator();
|
|
opts.memtable_factory.reset(new SpecialSkipListFactory(kNumPerFile));
|
|
DestroyAndReopen(opts);
|
|
|
|
// Write half of the keys before the tombstone and half after the tombstone.
|
|
// Only covered keys (i.e., within the range and older than the tombstone)
|
|
// should be deleted.
|
|
for (int i = 0; i < kNum; ++i) {
|
|
if (i == kNum / 2) {
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
|
|
GetNumericStr(kRangeBegin),
|
|
GetNumericStr(kRangeEnd)));
|
|
}
|
|
ASSERT_OK(db_->Put(WriteOptions(), GetNumericStr(i), "val"));
|
|
}
|
|
ReadOptions read_opts;
|
|
auto* iter = db_->NewIterator(read_opts);
|
|
ASSERT_OK(iter->status());
|
|
|
|
int expected = 0;
|
|
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
|
|
ASSERT_EQ(GetNumericStr(expected), iter->key());
|
|
if (expected == kRangeBegin - 1) {
|
|
expected = kNum / 2;
|
|
} else {
|
|
++expected;
|
|
}
|
|
}
|
|
ASSERT_EQ(kNum, expected);
|
|
delete iter;
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, IteratorOverUserSnapshot) {
|
|
const int kNum = 200, kRangeBegin = 50, kRangeEnd = 150, kNumPerFile = 25;
|
|
Options opts = CurrentOptions();
|
|
opts.comparator = test::Uint64Comparator();
|
|
opts.memtable_factory.reset(new SpecialSkipListFactory(kNumPerFile));
|
|
DestroyAndReopen(opts);
|
|
|
|
const Snapshot* snapshot = nullptr;
|
|
// Put a snapshot before the range tombstone, verify an iterator using that
|
|
// snapshot sees all inserted keys.
|
|
for (int i = 0; i < kNum; ++i) {
|
|
if (i == kNum / 2) {
|
|
snapshot = db_->GetSnapshot();
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
|
|
GetNumericStr(kRangeBegin),
|
|
GetNumericStr(kRangeEnd)));
|
|
}
|
|
ASSERT_OK(db_->Put(WriteOptions(), GetNumericStr(i), "val"));
|
|
}
|
|
ReadOptions read_opts;
|
|
read_opts.snapshot = snapshot;
|
|
auto* iter = db_->NewIterator(read_opts);
|
|
ASSERT_OK(iter->status());
|
|
|
|
int expected = 0;
|
|
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
|
|
ASSERT_EQ(GetNumericStr(expected), iter->key());
|
|
++expected;
|
|
}
|
|
ASSERT_EQ(kNum / 2, expected);
|
|
delete iter;
|
|
db_->ReleaseSnapshot(snapshot);
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, IteratorIgnoresRangeDeletions) {
|
|
Options opts = CurrentOptions();
|
|
opts.max_write_buffer_number = 4;
|
|
opts.min_write_buffer_number_to_merge = 3;
|
|
opts.memtable_factory.reset(new SpecialSkipListFactory(1));
|
|
Reopen(opts);
|
|
|
|
ASSERT_OK(db_->Put(WriteOptions(), "sst_key", "val"));
|
|
// snapshot prevents key from being deleted during flush
|
|
const Snapshot* snapshot = db_->GetSnapshot();
|
|
ASSERT_OK(
|
|
db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "z"));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
ASSERT_OK(db_->Put(WriteOptions(), "imm_key", "val"));
|
|
ASSERT_OK(
|
|
db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "z"));
|
|
ASSERT_OK(db_->Put(WriteOptions(), "mem_key", "val"));
|
|
ASSERT_OK(
|
|
db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "z"));
|
|
|
|
ReadOptions read_opts;
|
|
read_opts.ignore_range_deletions = true;
|
|
auto* iter = db_->NewIterator(read_opts);
|
|
ASSERT_OK(iter->status());
|
|
int i = 0;
|
|
std::string expected[] = {"imm_key", "mem_key", "sst_key"};
|
|
for (iter->SeekToFirst(); iter->Valid(); iter->Next(), ++i) {
|
|
std::string key;
|
|
ASSERT_EQ(expected[i], iter->key());
|
|
}
|
|
ASSERT_EQ(3, i);
|
|
delete iter;
|
|
db_->ReleaseSnapshot(snapshot);
|
|
}
|
|
|
|
#ifndef ROCKSDB_UBSAN_RUN
|
|
TEST_F(DBRangeDelTest, TailingIteratorRangeTombstoneUnsupported) {
|
|
ASSERT_OK(db_->Put(WriteOptions(), "key", "val"));
|
|
// snapshot prevents key from being deleted during flush
|
|
const Snapshot* snapshot = db_->GetSnapshot();
|
|
ASSERT_OK(
|
|
db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), "a", "z"));
|
|
|
|
// iterations check unsupported in memtable, l0, and then l1
|
|
for (int i = 0; i < 3; ++i) {
|
|
ReadOptions read_opts;
|
|
read_opts.tailing = true;
|
|
auto* iter = db_->NewIterator(read_opts);
|
|
if (i == 2) {
|
|
// For L1+, iterators over files are created on-demand, so need seek
|
|
iter->SeekToFirst();
|
|
}
|
|
ASSERT_TRUE(iter->status().IsNotSupported());
|
|
|
|
delete iter;
|
|
if (i == 0) {
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
} else if (i == 1) {
|
|
MoveFilesToLevel(1);
|
|
}
|
|
}
|
|
db_->ReleaseSnapshot(snapshot);
|
|
}
|
|
#endif // !ROCKSDB_UBSAN_RUN
|
|
|
|
TEST_F(DBRangeDelTest, SubcompactionHasEmptyDedicatedRangeDelFile) {
|
|
const int kNumFiles = 2, kNumKeysPerFile = 4;
|
|
Options options = CurrentOptions();
|
|
options.compression = kNoCompression;
|
|
options.disable_auto_compactions = true;
|
|
options.level0_file_num_compaction_trigger = kNumFiles;
|
|
options.max_subcompactions = 2;
|
|
options.num_levels = 2;
|
|
options.target_file_size_base = 4096;
|
|
Reopen(options);
|
|
|
|
// need a L1 file for subcompaction to be triggered
|
|
ASSERT_OK(
|
|
db_->Put(WriteOptions(), db_->DefaultColumnFamily(), Key(0), "val"));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
MoveFilesToLevel(1);
|
|
|
|
// put enough keys to fill up the first subcompaction, and later range-delete
|
|
// them so that the first subcompaction outputs no key-values. In that case
|
|
// it'll consider making an SST file dedicated to range deletions.
|
|
for (int i = 0; i < kNumKeysPerFile; ++i) {
|
|
ASSERT_OK(db_->Put(WriteOptions(), db_->DefaultColumnFamily(), Key(i),
|
|
std::string(1024, 'a')));
|
|
}
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), Key(0),
|
|
Key(kNumKeysPerFile)));
|
|
|
|
// the above range tombstone can be dropped, so that one alone won't cause a
|
|
// dedicated file to be opened. We can make one protected by snapshot that
|
|
// must be considered. Make its range outside the first subcompaction's range
|
|
// to exercise the tricky part of the code.
|
|
const Snapshot* snapshot = db_->GetSnapshot();
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
|
|
Key(kNumKeysPerFile + 1),
|
|
Key(kNumKeysPerFile + 2)));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
|
|
ASSERT_EQ(kNumFiles, NumTableFilesAtLevel(0));
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(1));
|
|
|
|
ASSERT_OK(db_->EnableAutoCompaction({db_->DefaultColumnFamily()}));
|
|
ASSERT_OK(dbfull()->TEST_WaitForCompact());
|
|
db_->ReleaseSnapshot(snapshot);
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, MemtableBloomFilter) {
|
|
// regression test for #2743. the range delete tombstones in memtable should
|
|
// be added even when Get() skips searching due to its prefix bloom filter
|
|
const int kMemtableSize = 1 << 20; // 1MB
|
|
const int kMemtablePrefixFilterSize = 1 << 13; // 8KB
|
|
const int kNumKeys = 1000;
|
|
const int kPrefixLen = 8;
|
|
Options options = CurrentOptions();
|
|
options.memtable_prefix_bloom_size_ratio =
|
|
static_cast<double>(kMemtablePrefixFilterSize) / kMemtableSize;
|
|
options.prefix_extractor.reset(
|
|
ROCKSDB_NAMESPACE::NewFixedPrefixTransform(kPrefixLen));
|
|
options.write_buffer_size = kMemtableSize;
|
|
Reopen(options);
|
|
|
|
for (int i = 0; i < kNumKeys; ++i) {
|
|
ASSERT_OK(Put(Key(i), "val"));
|
|
}
|
|
ASSERT_OK(Flush());
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), Key(0),
|
|
Key(kNumKeys)));
|
|
for (int i = 0; i < kNumKeys; ++i) {
|
|
std::string value;
|
|
ASSERT_TRUE(db_->Get(ReadOptions(), Key(i), &value).IsNotFound());
|
|
}
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, CompactionTreatsSplitInputLevelDeletionAtomically) {
|
|
// This test originally verified that compaction treated files containing a
|
|
// split range deletion in the input level as an atomic unit. I.e.,
|
|
// compacting any input-level file(s) containing a portion of the range
|
|
// deletion causes all other input-level files containing portions of that
|
|
// same range deletion to be included in the compaction. Range deletion
|
|
// tombstones are now truncated to sstable boundaries which removed the need
|
|
// for that behavior (which could lead to excessively large
|
|
// compactions).
|
|
const int kNumFilesPerLevel = 4, kValueBytes = 4 << 10;
|
|
Options options = CurrentOptions();
|
|
options.compression = kNoCompression;
|
|
options.level0_file_num_compaction_trigger = kNumFilesPerLevel;
|
|
options.memtable_factory.reset(
|
|
new SpecialSkipListFactory(2 /* num_entries_flush */));
|
|
options.target_file_size_base = kValueBytes;
|
|
// i == 0: CompactFiles
|
|
// i == 1: CompactRange
|
|
// i == 2: automatic compaction
|
|
for (int i = 0; i < 3; ++i) {
|
|
DestroyAndReopen(options);
|
|
|
|
ASSERT_OK(Put(Key(0), ""));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
MoveFilesToLevel(2);
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(2));
|
|
|
|
// snapshot protects range tombstone from dropping due to becoming obsolete.
|
|
const Snapshot* snapshot = db_->GetSnapshot();
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
|
|
Key(0), Key(2 * kNumFilesPerLevel)));
|
|
|
|
Random rnd(301);
|
|
std::string value = rnd.RandomString(kValueBytes);
|
|
for (int j = 0; j < kNumFilesPerLevel; ++j) {
|
|
// give files overlapping key-ranges to prevent trivial move
|
|
ASSERT_OK(Put(Key(j), value));
|
|
ASSERT_OK(Put(Key(2 * kNumFilesPerLevel - 1 - j), value));
|
|
if (j > 0) {
|
|
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
|
|
ASSERT_EQ(j, NumTableFilesAtLevel(0));
|
|
}
|
|
}
|
|
// put extra key to trigger final flush
|
|
ASSERT_OK(Put("", ""));
|
|
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
|
|
ASSERT_OK(dbfull()->TEST_WaitForCompact());
|
|
ASSERT_EQ(0, NumTableFilesAtLevel(0));
|
|
ASSERT_EQ(kNumFilesPerLevel, NumTableFilesAtLevel(1));
|
|
|
|
ColumnFamilyMetaData meta;
|
|
db_->GetColumnFamilyMetaData(&meta);
|
|
if (i == 0) {
|
|
ASSERT_OK(db_->CompactFiles(
|
|
CompactionOptions(), {meta.levels[1].files[0].name}, 2 /* level */));
|
|
ASSERT_EQ(0, NumTableFilesAtLevel(1));
|
|
} else if (i == 1) {
|
|
auto begin_str = Key(0), end_str = Key(1);
|
|
Slice begin = begin_str, end = end_str;
|
|
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), &begin, &end));
|
|
ASSERT_EQ(3, NumTableFilesAtLevel(1));
|
|
} else if (i == 2) {
|
|
ASSERT_OK(db_->SetOptions(db_->DefaultColumnFamily(),
|
|
{{"max_bytes_for_level_base", "10000"}}));
|
|
ASSERT_OK(dbfull()->TEST_WaitForCompact());
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(1));
|
|
}
|
|
ASSERT_GT(NumTableFilesAtLevel(2), 0);
|
|
|
|
db_->ReleaseSnapshot(snapshot);
|
|
}
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, RangeTombstoneEndKeyAsSstableUpperBound) {
|
|
// Test the handling of the range-tombstone end-key as the
|
|
// upper-bound for an sstable.
|
|
|
|
const int kNumFilesPerLevel = 2, kValueBytes = 4 << 10;
|
|
Options options = CurrentOptions();
|
|
options.compression = kNoCompression;
|
|
options.level0_file_num_compaction_trigger = kNumFilesPerLevel;
|
|
options.memtable_factory.reset(
|
|
new SpecialSkipListFactory(2 /* num_entries_flush */));
|
|
options.target_file_size_base = kValueBytes;
|
|
options.disable_auto_compactions = true;
|
|
|
|
DestroyAndReopen(options);
|
|
|
|
// Create an initial sstable at L2:
|
|
// [key000000#1,1, key000000#1,1]
|
|
ASSERT_OK(Put(Key(0), ""));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
MoveFilesToLevel(2);
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(2));
|
|
|
|
// A snapshot protects the range tombstone from dropping due to
|
|
// becoming obsolete.
|
|
const Snapshot* snapshot = db_->GetSnapshot();
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), Key(0),
|
|
Key(2 * kNumFilesPerLevel)));
|
|
|
|
// Create 2 additional sstables in L0. Note that the first sstable
|
|
// contains the range tombstone.
|
|
// [key000000#3,1, key000004#72057594037927935,15]
|
|
// [key000001#5,1, key000002#6,1]
|
|
Random rnd(301);
|
|
std::string value = rnd.RandomString(kValueBytes);
|
|
for (int j = 0; j < kNumFilesPerLevel; ++j) {
|
|
// Give files overlapping key-ranges to prevent a trivial move when we
|
|
// compact from L0 to L1.
|
|
ASSERT_OK(Put(Key(j), value));
|
|
ASSERT_OK(Put(Key(2 * kNumFilesPerLevel - 1 - j), value));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
ASSERT_EQ(j + 1, NumTableFilesAtLevel(0));
|
|
}
|
|
// Compact the 2 L0 sstables to L1, resulting in the following LSM. There
|
|
// are 2 sstables generated in L1 due to the target_file_size_base setting.
|
|
// L1:
|
|
// [key000000#3,1, key000002#72057594037927935,15]
|
|
// [key000002#6,1, key000004#72057594037927935,15]
|
|
// L2:
|
|
// [key000000#1,1, key000000#1,1]
|
|
MoveFilesToLevel(1);
|
|
ASSERT_EQ(2, NumTableFilesAtLevel(1));
|
|
|
|
{
|
|
// Compact the second sstable in L1:
|
|
// L1:
|
|
// [key000000#3,1, key000002#72057594037927935,15]
|
|
// L2:
|
|
// [key000000#1,1, key000000#1,1]
|
|
// [key000002#6,1, key000004#72057594037927935,15]
|
|
//
|
|
// At the same time, verify the compaction does not cause the key at the
|
|
// endpoint (key000002#6,1) to disappear.
|
|
ASSERT_EQ(value, Get(Key(2)));
|
|
auto begin_str = Key(3);
|
|
const ROCKSDB_NAMESPACE::Slice begin = begin_str;
|
|
ASSERT_OK(dbfull()->TEST_CompactRange(1, &begin, nullptr));
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(1));
|
|
ASSERT_EQ(2, NumTableFilesAtLevel(2));
|
|
ASSERT_EQ(value, Get(Key(2)));
|
|
}
|
|
|
|
{
|
|
// Compact the first sstable in L1. This should be copacetic, but
|
|
// was previously resulting in overlapping sstables in L2 due to
|
|
// mishandling of the range tombstone end-key when used as the
|
|
// largest key for an sstable. The resulting LSM structure should
|
|
// be:
|
|
//
|
|
// L2:
|
|
// [key000000#1,1, key000001#72057594037927935,15]
|
|
// [key000001#5,1, key000002#72057594037927935,15]
|
|
// [key000002#6,1, key000004#72057594037927935,15]
|
|
auto begin_str = Key(0);
|
|
const ROCKSDB_NAMESPACE::Slice begin = begin_str;
|
|
ASSERT_OK(dbfull()->TEST_CompactRange(1, &begin, &begin));
|
|
ASSERT_EQ(0, NumTableFilesAtLevel(1));
|
|
ASSERT_EQ(3, NumTableFilesAtLevel(2));
|
|
}
|
|
|
|
db_->ReleaseSnapshot(snapshot);
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, UnorderedTombstones) {
|
|
// Regression test for #2752. Range delete tombstones between
|
|
// different snapshot stripes are not stored in order, so the first
|
|
// tombstone of each snapshot stripe should be checked as a smallest
|
|
// candidate.
|
|
Options options = CurrentOptions();
|
|
DestroyAndReopen(options);
|
|
|
|
auto cf = db_->DefaultColumnFamily();
|
|
|
|
ASSERT_OK(db_->Put(WriteOptions(), cf, "a", "a"));
|
|
ASSERT_OK(db_->Flush(FlushOptions(), cf));
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(0));
|
|
ASSERT_OK(dbfull()->TEST_CompactRange(0, nullptr, nullptr));
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(1));
|
|
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), cf, "b", "c"));
|
|
// Hold a snapshot to separate these two delete ranges.
|
|
auto snapshot = db_->GetSnapshot();
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), cf, "a", "b"));
|
|
ASSERT_OK(db_->Flush(FlushOptions(), cf));
|
|
db_->ReleaseSnapshot(snapshot);
|
|
|
|
std::vector<std::vector<FileMetaData>> files;
|
|
dbfull()->TEST_GetFilesMetaData(cf, &files);
|
|
ASSERT_EQ(1, files[0].size());
|
|
ASSERT_EQ("a", files[0][0].smallest.user_key());
|
|
ASSERT_EQ("c", files[0][0].largest.user_key());
|
|
|
|
std::string v;
|
|
auto s = db_->Get(ReadOptions(), "a", &v);
|
|
ASSERT_TRUE(s.IsNotFound());
|
|
}
|
|
|
|
class MockMergeOperator : public MergeOperator {
|
|
// Mock non-associative operator. Non-associativity is expressed by lack of
|
|
// implementation for any `PartialMerge*` functions.
|
|
public:
|
|
bool FullMergeV2(const MergeOperationInput& merge_in,
|
|
MergeOperationOutput* merge_out) const override {
|
|
assert(merge_out != nullptr);
|
|
merge_out->new_value = merge_in.operand_list.back().ToString();
|
|
return true;
|
|
}
|
|
|
|
const char* Name() const override { return "MockMergeOperator"; }
|
|
};
|
|
|
|
TEST_F(DBRangeDelTest, KeyAtOverlappingEndpointReappears) {
|
|
// This test uses a non-associative merge operator since that is a convenient
|
|
// way to get compaction to write out files with overlapping user-keys at the
|
|
// endpoints. Note, however, overlapping endpoints can also occur with other
|
|
// value types (Put, etc.), assuming the right snapshots are present.
|
|
const int kFileBytes = 1 << 20;
|
|
const int kValueBytes = 1 << 10;
|
|
const int kNumFiles = 4;
|
|
|
|
Options options = CurrentOptions();
|
|
options.compression = kNoCompression;
|
|
options.disable_auto_compactions = true;
|
|
options.merge_operator.reset(new MockMergeOperator());
|
|
options.target_file_size_base = kFileBytes;
|
|
Reopen(options);
|
|
|
|
// Push dummy data to L3 so that our actual test files on L0-L2
|
|
// will not be considered "bottommost" level, otherwise compaction
|
|
// may prevent us from creating overlapping user keys
|
|
// as on the bottommost layer MergeHelper
|
|
ASSERT_OK(db_->Merge(WriteOptions(), "key", "dummy"));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
MoveFilesToLevel(3);
|
|
|
|
Random rnd(301);
|
|
const Snapshot* snapshot = nullptr;
|
|
for (int i = 0; i < kNumFiles; ++i) {
|
|
for (int j = 0; j < kFileBytes / kValueBytes; ++j) {
|
|
auto value = rnd.RandomString(kValueBytes);
|
|
ASSERT_OK(db_->Merge(WriteOptions(), "key", value));
|
|
}
|
|
if (i == kNumFiles - 1) {
|
|
// Take snapshot to prevent covered merge operands from being dropped by
|
|
// compaction.
|
|
snapshot = db_->GetSnapshot();
|
|
// The DeleteRange is the last write so all merge operands are covered.
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
|
|
"key", "key_"));
|
|
}
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
}
|
|
ASSERT_EQ(kNumFiles, NumTableFilesAtLevel(0));
|
|
std::string value;
|
|
ASSERT_TRUE(db_->Get(ReadOptions(), "key", &value).IsNotFound());
|
|
|
|
ASSERT_OK(dbfull()->TEST_CompactRange(
|
|
0 /* level */, nullptr /* begin */, nullptr /* end */,
|
|
nullptr /* column_family */, true /* disallow_trivial_move */));
|
|
ASSERT_EQ(0, NumTableFilesAtLevel(0));
|
|
// Now we have multiple files at L1 all containing a single user key, thus
|
|
// guaranteeing overlap in the file endpoints.
|
|
ASSERT_GT(NumTableFilesAtLevel(1), 1);
|
|
|
|
// Verify no merge operands reappeared after the compaction.
|
|
ASSERT_TRUE(db_->Get(ReadOptions(), "key", &value).IsNotFound());
|
|
|
|
// Compact and verify again. It's worthwhile because now the files have
|
|
// tighter endpoints, so we can verify that doesn't mess anything up.
|
|
ASSERT_OK(dbfull()->TEST_CompactRange(
|
|
1 /* level */, nullptr /* begin */, nullptr /* end */,
|
|
nullptr /* column_family */, true /* disallow_trivial_move */));
|
|
ASSERT_GT(NumTableFilesAtLevel(2), 1);
|
|
ASSERT_TRUE(db_->Get(ReadOptions(), "key", &value).IsNotFound());
|
|
|
|
db_->ReleaseSnapshot(snapshot);
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, UntruncatedTombstoneDoesNotDeleteNewerKey) {
|
|
// Verify a key newer than a range tombstone cannot be deleted by being
|
|
// compacted to the bottom level (and thus having its seqnum zeroed) before
|
|
// the range tombstone. This used to happen when range tombstones were
|
|
// untruncated on reads such that they extended past their file boundaries.
|
|
//
|
|
// Test summary:
|
|
//
|
|
// - L1 is bottommost.
|
|
// - A couple snapshots are strategically taken to prevent seqnums from being
|
|
// zeroed, range tombstone from being dropped, merge operands from being
|
|
// dropped, and merge operands from being combined.
|
|
// - Left half of files in L1 all have same user key, ensuring their file
|
|
// boundaries overlap. In the past this would cause range tombstones to be
|
|
// untruncated.
|
|
// - Right half of L1 files all have different keys, ensuring no overlap.
|
|
// - A range tombstone spans all L1 keys, so it is stored in every L1 file.
|
|
// - Keys in the right side of the key-range are overwritten. These are
|
|
// compacted down to L1 after releasing snapshots such that their seqnums
|
|
// will be zeroed.
|
|
// - A full range scan is performed. If the tombstone in the left L1 files
|
|
// were untruncated, it would now cover keys newer than it (but with zeroed
|
|
// seqnums) in the right L1 files.
|
|
const int kFileBytes = 1 << 20;
|
|
const int kValueBytes = 1 << 10;
|
|
const int kNumFiles = 4;
|
|
const int kMaxKey = kNumFiles* kFileBytes / kValueBytes;
|
|
const int kKeysOverwritten = 10;
|
|
|
|
Options options = CurrentOptions();
|
|
options.compression = kNoCompression;
|
|
options.disable_auto_compactions = true;
|
|
options.merge_operator.reset(new MockMergeOperator());
|
|
options.num_levels = 2;
|
|
options.target_file_size_base = kFileBytes;
|
|
Reopen(options);
|
|
|
|
Random rnd(301);
|
|
// - snapshots[0] prevents merge operands from being combined during
|
|
// compaction.
|
|
// - snapshots[1] prevents merge operands from being dropped due to the
|
|
// covering range tombstone.
|
|
const Snapshot* snapshots[] = {nullptr, nullptr};
|
|
for (int i = 0; i < kNumFiles; ++i) {
|
|
for (int j = 0; j < kFileBytes / kValueBytes; ++j) {
|
|
auto value = rnd.RandomString(kValueBytes);
|
|
std::string key;
|
|
if (i < kNumFiles / 2) {
|
|
key = Key(0);
|
|
} else {
|
|
key = Key(1 + i * kFileBytes / kValueBytes + j);
|
|
}
|
|
ASSERT_OK(db_->Merge(WriteOptions(), key, value));
|
|
}
|
|
if (i == 0) {
|
|
snapshots[0] = db_->GetSnapshot();
|
|
}
|
|
if (i == kNumFiles - 1) {
|
|
snapshots[1] = db_->GetSnapshot();
|
|
// The DeleteRange is the last write so all merge operands are covered.
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
|
|
Key(0), Key(kMaxKey + 1)));
|
|
}
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
}
|
|
ASSERT_EQ(kNumFiles, NumTableFilesAtLevel(0));
|
|
|
|
auto get_key_count = [this]() -> int {
|
|
auto* iter = db_->NewIterator(ReadOptions());
|
|
assert(iter->status().ok());
|
|
iter->SeekToFirst();
|
|
int keys_found = 0;
|
|
for (; iter->Valid(); iter->Next()) {
|
|
++keys_found;
|
|
}
|
|
delete iter;
|
|
return keys_found;
|
|
};
|
|
|
|
// All keys should be covered
|
|
ASSERT_EQ(0, get_key_count());
|
|
|
|
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr /* begin_key */,
|
|
nullptr /* end_key */));
|
|
ASSERT_EQ(0, NumTableFilesAtLevel(0));
|
|
// Roughly the left half of L1 files should have overlapping boundary keys,
|
|
// while the right half should not.
|
|
ASSERT_GE(NumTableFilesAtLevel(1), kNumFiles);
|
|
|
|
// Now overwrite a few keys that are in L1 files that definitely don't have
|
|
// overlapping boundary keys.
|
|
for (int i = kMaxKey; i > kMaxKey - kKeysOverwritten; --i) {
|
|
auto value = rnd.RandomString(kValueBytes);
|
|
ASSERT_OK(db_->Merge(WriteOptions(), Key(i), value));
|
|
}
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
|
|
// The overwritten keys are in L0 now, so clearly aren't covered by the range
|
|
// tombstone in L1.
|
|
ASSERT_EQ(kKeysOverwritten, get_key_count());
|
|
|
|
// Release snapshots so seqnums can be zeroed when L0->L1 happens.
|
|
db_->ReleaseSnapshot(snapshots[0]);
|
|
db_->ReleaseSnapshot(snapshots[1]);
|
|
|
|
auto begin_key_storage = Key(kMaxKey - kKeysOverwritten + 1);
|
|
auto end_key_storage = Key(kMaxKey);
|
|
Slice begin_key(begin_key_storage);
|
|
Slice end_key(end_key_storage);
|
|
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), &begin_key, &end_key));
|
|
ASSERT_EQ(0, NumTableFilesAtLevel(0));
|
|
ASSERT_GE(NumTableFilesAtLevel(1), kNumFiles);
|
|
|
|
ASSERT_EQ(kKeysOverwritten, get_key_count());
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, DeletedMergeOperandReappearsIterPrev) {
|
|
// Exposes a bug where we were using
|
|
// `RangeDelPositioningMode::kBackwardTraversal` while scanning merge operands
|
|
// in the forward direction. Confusingly, this case happened during
|
|
// `DBIter::Prev`. It could cause assertion failure, or reappearing keys.
|
|
const int kFileBytes = 1 << 20;
|
|
const int kValueBytes = 1 << 10;
|
|
// Need multiple keys so we can get results when calling `Prev()` after
|
|
// `SeekToLast()`.
|
|
const int kNumKeys = 3;
|
|
const int kNumFiles = 4;
|
|
|
|
Options options = CurrentOptions();
|
|
options.compression = kNoCompression;
|
|
options.disable_auto_compactions = true;
|
|
options.merge_operator.reset(new MockMergeOperator());
|
|
options.target_file_size_base = kFileBytes;
|
|
Reopen(options);
|
|
|
|
Random rnd(301);
|
|
const Snapshot* snapshot = nullptr;
|
|
for (int i = 0; i < kNumFiles; ++i) {
|
|
for (int j = 0; j < kFileBytes / kValueBytes; ++j) {
|
|
auto value = rnd.RandomString(kValueBytes);
|
|
ASSERT_OK(db_->Merge(WriteOptions(), Key(j % kNumKeys), value));
|
|
if (i == 0 && j == kNumKeys) {
|
|
// Take snapshot to prevent covered merge operands from being dropped or
|
|
// merged by compaction.
|
|
snapshot = db_->GetSnapshot();
|
|
// Do a DeleteRange near the beginning so only the oldest merge operand
|
|
// for each key is covered. This ensures the sequence of events:
|
|
//
|
|
// - `DBIter::Prev()` is called
|
|
// - After several same versions of the same user key are encountered,
|
|
// it decides to seek using `DBIter::FindValueForCurrentKeyUsingSeek`.
|
|
// - Binary searches to the newest version of the key, which is in the
|
|
// leftmost file containing the user key.
|
|
// - Scans forwards to collect all merge operands. Eventually reaches
|
|
// the rightmost file containing the oldest merge operand, which
|
|
// should be covered by the `DeleteRange`. If `RangeDelAggregator`
|
|
// were not properly using `kForwardTraversal` here, that operand
|
|
// would reappear.
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
|
|
Key(0), Key(kNumKeys + 1)));
|
|
}
|
|
}
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
}
|
|
ASSERT_EQ(kNumFiles, NumTableFilesAtLevel(0));
|
|
|
|
ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr /* begin_key */,
|
|
nullptr /* end_key */));
|
|
ASSERT_EQ(0, NumTableFilesAtLevel(0));
|
|
ASSERT_GT(NumTableFilesAtLevel(1), 1);
|
|
|
|
auto* iter = db_->NewIterator(ReadOptions());
|
|
ASSERT_OK(iter->status());
|
|
iter->SeekToLast();
|
|
int keys_found = 0;
|
|
for (; iter->Valid(); iter->Prev()) {
|
|
++keys_found;
|
|
}
|
|
delete iter;
|
|
ASSERT_EQ(kNumKeys, keys_found);
|
|
|
|
db_->ReleaseSnapshot(snapshot);
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, SnapshotPreventsDroppedKeys) {
|
|
const int kFileBytes = 1 << 20;
|
|
|
|
Options options = CurrentOptions();
|
|
options.compression = kNoCompression;
|
|
options.disable_auto_compactions = true;
|
|
options.target_file_size_base = kFileBytes;
|
|
Reopen(options);
|
|
|
|
ASSERT_OK(Put(Key(0), "a"));
|
|
const Snapshot* snapshot = db_->GetSnapshot();
|
|
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), Key(0),
|
|
Key(10)));
|
|
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
|
|
ReadOptions read_opts;
|
|
read_opts.snapshot = snapshot;
|
|
auto* iter = db_->NewIterator(read_opts);
|
|
ASSERT_OK(iter->status());
|
|
|
|
iter->SeekToFirst();
|
|
ASSERT_TRUE(iter->Valid());
|
|
ASSERT_EQ(Key(0), iter->key());
|
|
|
|
iter->Next();
|
|
ASSERT_FALSE(iter->Valid());
|
|
|
|
delete iter;
|
|
db_->ReleaseSnapshot(snapshot);
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, SnapshotPreventsDroppedKeysInImmMemTables) {
|
|
const int kFileBytes = 1 << 20;
|
|
|
|
Options options = CurrentOptions();
|
|
options.compression = kNoCompression;
|
|
options.disable_auto_compactions = true;
|
|
options.target_file_size_base = kFileBytes;
|
|
Reopen(options);
|
|
|
|
// block flush thread -> pin immtables in memory
|
|
SyncPoint::GetInstance()->DisableProcessing();
|
|
SyncPoint::GetInstance()->LoadDependency({
|
|
{"SnapshotPreventsDroppedKeysInImmMemTables:AfterNewIterator",
|
|
"DBImpl::BGWorkFlush"},
|
|
});
|
|
SyncPoint::GetInstance()->EnableProcessing();
|
|
|
|
ASSERT_OK(Put(Key(0), "a"));
|
|
std::unique_ptr<const Snapshot, std::function<void(const Snapshot*)>>
|
|
snapshot(db_->GetSnapshot(),
|
|
[this](const Snapshot* s) { db_->ReleaseSnapshot(s); });
|
|
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), Key(0),
|
|
Key(10)));
|
|
|
|
ASSERT_OK(dbfull()->TEST_SwitchMemtable());
|
|
|
|
ReadOptions read_opts;
|
|
read_opts.snapshot = snapshot.get();
|
|
std::unique_ptr<Iterator> iter(db_->NewIterator(read_opts));
|
|
ASSERT_OK(iter->status());
|
|
|
|
TEST_SYNC_POINT("SnapshotPreventsDroppedKeysInImmMemTables:AfterNewIterator");
|
|
|
|
iter->SeekToFirst();
|
|
ASSERT_TRUE(iter->Valid());
|
|
ASSERT_EQ(Key(0), iter->key());
|
|
|
|
iter->Next();
|
|
ASSERT_FALSE(iter->Valid());
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, RangeTombstoneWrittenToMinimalSsts) {
|
|
// Adapted from
|
|
// https://github.com/cockroachdb/cockroach/blob/de8b3ea603dd1592d9dc26443c2cc92c356fbc2f/pkg/storage/engine/rocksdb_test.go#L1267-L1398.
|
|
// Regression test for issue where range tombstone was written to more files
|
|
// than necessary when it began exactly at the begin key in the next
|
|
// compaction output file.
|
|
const int kFileBytes = 1 << 20;
|
|
const int kValueBytes = 4 << 10;
|
|
Options options = CurrentOptions();
|
|
options.compression = kNoCompression;
|
|
options.disable_auto_compactions = true;
|
|
// Have a bit of slack in the size limits but we enforce them more strictly
|
|
// when manually flushing/compacting.
|
|
options.max_compaction_bytes = 2 * kFileBytes;
|
|
options.target_file_size_base = 2 * kFileBytes;
|
|
options.write_buffer_size = 2 * kFileBytes;
|
|
Reopen(options);
|
|
|
|
Random rnd(301);
|
|
for (char first_char : {'a', 'b', 'c'}) {
|
|
for (int i = 0; i < kFileBytes / kValueBytes; ++i) {
|
|
std::string key(1, first_char);
|
|
key.append(Key(i));
|
|
std::string value = rnd.RandomString(kValueBytes);
|
|
ASSERT_OK(Put(key, value));
|
|
}
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
MoveFilesToLevel(2);
|
|
}
|
|
ASSERT_EQ(0, NumTableFilesAtLevel(0));
|
|
ASSERT_EQ(3, NumTableFilesAtLevel(2));
|
|
|
|
// Populate the memtable lightly while spanning the whole key-space. The
|
|
// setting of `max_compaction_bytes` will cause the L0->L1 to output multiple
|
|
// files to prevent a large L1->L2 compaction later.
|
|
ASSERT_OK(Put("a", "val"));
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(),
|
|
"c" + Key(1), "d"));
|
|
// Our compaction output file cutting logic currently only considers point
|
|
// keys. So, in order for the range tombstone to have a chance at landing at
|
|
// the start of a new file, we need a point key at the range tombstone's
|
|
// start.
|
|
// TODO(ajkr): remove this `Put` after file cutting accounts for range
|
|
// tombstones (#3977).
|
|
ASSERT_OK(Put("c" + Key(1), "value"));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
|
|
// Ensure manual L0->L1 compaction cuts the outputs before the range tombstone
|
|
// and the range tombstone is only placed in the second SST.
|
|
std::string begin_key_storage("c" + Key(1));
|
|
Slice begin_key(begin_key_storage);
|
|
std::string end_key_storage("d");
|
|
Slice end_key(end_key_storage);
|
|
ASSERT_OK(dbfull()->TEST_CompactRange(
|
|
0 /* level */, &begin_key /* begin */, &end_key /* end */,
|
|
nullptr /* column_family */, true /* disallow_trivial_move */));
|
|
ASSERT_EQ(2, NumTableFilesAtLevel(1));
|
|
|
|
std::vector<LiveFileMetaData> all_metadata;
|
|
std::vector<LiveFileMetaData> l1_metadata;
|
|
db_->GetLiveFilesMetaData(&all_metadata);
|
|
for (const auto& metadata : all_metadata) {
|
|
if (metadata.level == 1) {
|
|
l1_metadata.push_back(metadata);
|
|
}
|
|
}
|
|
std::sort(l1_metadata.begin(), l1_metadata.end(),
|
|
[&](const LiveFileMetaData& a, const LiveFileMetaData& b) {
|
|
return options.comparator->Compare(a.smallestkey, b.smallestkey) <
|
|
0;
|
|
});
|
|
ASSERT_EQ("a", l1_metadata[0].smallestkey);
|
|
ASSERT_EQ("a", l1_metadata[0].largestkey);
|
|
ASSERT_EQ("c" + Key(1), l1_metadata[1].smallestkey);
|
|
ASSERT_EQ("d", l1_metadata[1].largestkey);
|
|
|
|
TablePropertiesCollection all_table_props;
|
|
ASSERT_OK(db_->GetPropertiesOfAllTables(&all_table_props));
|
|
int64_t num_range_deletions = 0;
|
|
for (const auto& name_and_table_props : all_table_props) {
|
|
const auto& name = name_and_table_props.first;
|
|
const auto& table_props = name_and_table_props.second;
|
|
// The range tombstone should only be output to the second L1 SST.
|
|
if (name.size() >= l1_metadata[1].name.size() &&
|
|
name.substr(name.size() - l1_metadata[1].name.size()).compare(l1_metadata[1].name) == 0) {
|
|
ASSERT_EQ(1, table_props->num_range_deletions);
|
|
++num_range_deletions;
|
|
} else {
|
|
ASSERT_EQ(0, table_props->num_range_deletions);
|
|
}
|
|
}
|
|
ASSERT_EQ(1, num_range_deletions);
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, OverlappedTombstones) {
|
|
const int kNumPerFile = 4, kNumFiles = 2;
|
|
Options options = CurrentOptions();
|
|
options.disable_auto_compactions = true;
|
|
options.max_compaction_bytes = 9 * 1024;
|
|
DestroyAndReopen(options);
|
|
Random rnd(301);
|
|
for (int i = 0; i < kNumFiles; ++i) {
|
|
std::vector<std::string> values;
|
|
// Write 12K (4 values, each 3K)
|
|
for (int j = 0; j < kNumPerFile; j++) {
|
|
values.push_back(rnd.RandomString(3 << 10));
|
|
ASSERT_OK(Put(Key(i * kNumPerFile + j), values[j]));
|
|
}
|
|
}
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(0));
|
|
MoveFilesToLevel(2);
|
|
ASSERT_EQ(2, NumTableFilesAtLevel(2));
|
|
|
|
ASSERT_OK(db_->DeleteRange(WriteOptions(), db_->DefaultColumnFamily(), Key(1),
|
|
Key((kNumFiles)*kNumPerFile + 1)));
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(0));
|
|
|
|
ASSERT_OK(dbfull()->TEST_CompactRange(0, nullptr, nullptr, nullptr,
|
|
true /* disallow_trivial_move */));
|
|
|
|
// The tombstone range is not broken up into multiple SSTs which may incur a
|
|
// large compaction with L2.
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(1));
|
|
std::vector<std::vector<FileMetaData>> files;
|
|
ASSERT_OK(dbfull()->TEST_CompactRange(1, nullptr, nullptr, nullptr,
|
|
true /* disallow_trivial_move */));
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(2));
|
|
ASSERT_EQ(0, NumTableFilesAtLevel(1));
|
|
}
|
|
|
|
TEST_F(DBRangeDelTest, OverlappedKeys) {
|
|
const int kNumPerFile = 4, kNumFiles = 2;
|
|
Options options = CurrentOptions();
|
|
options.disable_auto_compactions = true;
|
|
options.max_compaction_bytes = 9 * 1024;
|
|
DestroyAndReopen(options);
|
|
Random rnd(301);
|
|
for (int i = 0; i < kNumFiles; ++i) {
|
|
std::vector<std::string> values;
|
|
// Write 12K (4 values, each 3K)
|
|
for (int j = 0; j < kNumPerFile; j++) {
|
|
values.push_back(rnd.RandomString(3 << 10));
|
|
ASSERT_OK(Put(Key(i * kNumPerFile + j), values[j]));
|
|
}
|
|
}
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(0));
|
|
MoveFilesToLevel(2);
|
|
ASSERT_EQ(2, NumTableFilesAtLevel(2));
|
|
|
|
for (int i = 1; i < kNumFiles * kNumPerFile + 1; i++) {
|
|
ASSERT_OK(Put(Key(i), "0x123"));
|
|
}
|
|
ASSERT_OK(db_->Flush(FlushOptions()));
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(0));
|
|
|
|
// The key range is broken up into three SSTs to avoid a future big compaction
|
|
// with the grandparent
|
|
ASSERT_OK(dbfull()->TEST_CompactRange(0, nullptr, nullptr, nullptr,
|
|
true /* disallow_trivial_move */));
|
|
ASSERT_EQ(3, NumTableFilesAtLevel(1));
|
|
|
|
std::vector<std::vector<FileMetaData>> files;
|
|
ASSERT_OK(dbfull()->TEST_CompactRange(1, nullptr, nullptr, nullptr,
|
|
true /* disallow_trivial_move */));
|
|
ASSERT_EQ(1, NumTableFilesAtLevel(2));
|
|
ASSERT_EQ(0, NumTableFilesAtLevel(1));
|
|
}
|
|
|
|
#endif // ROCKSDB_LITE
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|
|
int main(int argc, char** argv) {
|
|
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
|
|
::testing::InitGoogleTest(&argc, argv);
|
|
return RUN_ALL_TESTS();
|
|
}
|