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594e815e32
rocksdb/table/table_test.cc
sdong d2b4d42d4b Fix kHashSearch bug with SeekForPrev (#6297) 
Summary:
When prefix is enabled the expected behavior when the prefix of the target does not exist is for Seek is to seek to any key larger than target and SeekToPrev to any key less than the target.
Currently. the prefix index (kHashSearch) returns OK status but sets Invalid() to indicate two cases: a prefix of the searched key does not exist, ii) the key is beyond the range of the keys in SST file. The SeekForPrev implementation in BlockBasedTable thus does not have enough information to know when it should set the index key to first (to return a key smaller than target). The patch fixes that by returning NotFound status for cases that the prefix does not exist. SeekForPrev in BlockBasedTable accordingly SeekToFirst instead of SeekToLast on the index iterator.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6297

Test Plan: SeekForPrev of non-exsiting prefix is added to block_test.cc, and a test case is added in db_test2, which fails without the fix.

Differential Revision: D19404695

fbshipit-source-id: cafbbf95f8f60ff9ede9ccc99d25bfa1cf6fcdc3
2020-01-15 14:28:39 -08:00

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include <stdio.h>
#include <algorithm>
#include <iostream>
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "block_fetcher.h"
#include "cache/lru_cache.h"
#include "db/dbformat.h"
#include "db/memtable.h"
#include "db/write_batch_internal.h"
#include "memtable/stl_wrappers.h"
#include "meta_blocks.h"
#include "monitoring/statistics.h"
#include "port/port.h"
#include "rocksdb/cache.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "rocksdb/file_system.h"
#include "rocksdb/iterator.h"
#include "rocksdb/memtablerep.h"
#include "rocksdb/perf_context.h"
#include "rocksdb/slice_transform.h"
#include "rocksdb/statistics.h"
#include "rocksdb/write_buffer_manager.h"
#include "table/block_based/block.h"
#include "table/block_based/block_based_table_builder.h"
#include "table/block_based/block_based_table_factory.h"
#include "table/block_based/block_based_table_reader.h"
#include "table/block_based/block_builder.h"
#include "table/block_based/flush_block_policy.h"
#include "table/format.h"
#include "table/get_context.h"
#include "table/internal_iterator.h"
#include "table/plain/plain_table_factory.h"
#include "table/scoped_arena_iterator.h"
#include "table/sst_file_writer_collectors.h"
#include "test_util/sync_point.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
#include "util/compression.h"
#include "util/random.h"
#include "util/string_util.h"
#include "utilities/merge_operators.h"
namespace rocksdb {
extern const uint64_t kLegacyBlockBasedTableMagicNumber;
extern const uint64_t kLegacyPlainTableMagicNumber;
extern const uint64_t kBlockBasedTableMagicNumber;
extern const uint64_t kPlainTableMagicNumber;
namespace {
const std::string kDummyValue(10000, 'o');
// DummyPropertiesCollector used to test BlockBasedTableProperties
class DummyPropertiesCollector : public TablePropertiesCollector {
public:
const char* Name() const override { return ""; }
Status Finish(UserCollectedProperties* /*properties*/) override {
return Status::OK();
}
Status Add(const Slice& /*user_key*/, const Slice& /*value*/) override {
return Status::OK();
}
UserCollectedProperties GetReadableProperties() const override {
return UserCollectedProperties{};
}
};
class DummyPropertiesCollectorFactory1
: public TablePropertiesCollectorFactory {
public:
TablePropertiesCollector* CreateTablePropertiesCollector(
TablePropertiesCollectorFactory::Context /*context*/) override {
return new DummyPropertiesCollector();
}
const char* Name() const override { return "DummyPropertiesCollector1"; }
};
class DummyPropertiesCollectorFactory2
: public TablePropertiesCollectorFactory {
public:
TablePropertiesCollector* CreateTablePropertiesCollector(
TablePropertiesCollectorFactory::Context /*context*/) override {
return new DummyPropertiesCollector();
}
const char* Name() const override { return "DummyPropertiesCollector2"; }
};
// Return reverse of "key".
// Used to test non-lexicographic comparators.
std::string Reverse(const Slice& key) {
auto rev = key.ToString();
std::reverse(rev.begin(), rev.end());
return rev;
}
class ReverseKeyComparator : public Comparator {
public:
const char* Name() const override {
return "rocksdb.ReverseBytewiseComparator";
}
int Compare(const Slice& a, const Slice& b) const override {
return BytewiseComparator()->Compare(Reverse(a), Reverse(b));
}
void FindShortestSeparator(std::string* start,
const Slice& limit) const override {
std::string s = Reverse(*start);
std::string l = Reverse(limit);
BytewiseComparator()->FindShortestSeparator(&s, l);
*start = Reverse(s);
}
void FindShortSuccessor(std::string* key) const override {
std::string s = Reverse(*key);
BytewiseComparator()->FindShortSuccessor(&s);
*key = Reverse(s);
}
};
ReverseKeyComparator reverse_key_comparator;
void Increment(const Comparator* cmp, std::string* key) {
if (cmp == BytewiseComparator()) {
key->push_back('\0');
} else {
assert(cmp == &reverse_key_comparator);
std::string rev = Reverse(*key);
rev.push_back('\0');
*key = Reverse(rev);
}
}
} // namespace
// Helper class for tests to unify the interface between
// BlockBuilder/TableBuilder and Block/Table.
class Constructor {
public:
explicit Constructor(const Comparator* cmp)
: data_(stl_wrappers::LessOfComparator(cmp)) {}
virtual ~Constructor() { }
void Add(const std::string& key, const Slice& value) {
data_[key] = value.ToString();
}
// Finish constructing the data structure with all the keys that have
// been added so far. Returns the keys in sorted order in "*keys"
// and stores the key/value pairs in "*kvmap"
void Finish(const Options& options, const ImmutableCFOptions& ioptions,
const MutableCFOptions& moptions,
const BlockBasedTableOptions& table_options,
const InternalKeyComparator& internal_comparator,
std::vector<std::string>* keys, stl_wrappers::KVMap* kvmap) {
last_internal_key_ = &internal_comparator;
*kvmap = data_;
keys->clear();
for (const auto& kv : data_) {
keys->push_back(kv.first);
}
data_.clear();
Status s = FinishImpl(options, ioptions, moptions, table_options,
internal_comparator, *kvmap);
ASSERT_TRUE(s.ok()) << s.ToString();
}
// Construct the data structure from the data in "data"
virtual Status FinishImpl(const Options& options,
const ImmutableCFOptions& ioptions,
const MutableCFOptions& moptions,
const BlockBasedTableOptions& table_options,
const InternalKeyComparator& internal_comparator,
const stl_wrappers::KVMap& data) = 0;
virtual InternalIterator* NewIterator(
const SliceTransform* prefix_extractor = nullptr) const = 0;
virtual const stl_wrappers::KVMap& data() { return data_; }
virtual bool IsArenaMode() const { return false; }
virtual DB* db() const { return nullptr; } // Overridden in DBConstructor
virtual bool AnywayDeleteIterator() const { return false; }
protected:
const InternalKeyComparator* last_internal_key_;
private:
stl_wrappers::KVMap data_;
};
class BlockConstructor: public Constructor {
public:
explicit BlockConstructor(const Comparator* cmp)
: Constructor(cmp),
comparator_(cmp),
block_(nullptr) { }
~BlockConstructor() override { delete block_; }
Status FinishImpl(const Options& /*options*/,
const ImmutableCFOptions& /*ioptions*/,
const MutableCFOptions& /*moptions*/,
const BlockBasedTableOptions& table_options,
const InternalKeyComparator& /*internal_comparator*/,
const stl_wrappers::KVMap& kv_map) override {
delete block_;
block_ = nullptr;
BlockBuilder builder(table_options.block_restart_interval);
for (const auto kv : kv_map) {
builder.Add(kv.first, kv.second);
}
// Open the block
data_ = builder.Finish().ToString();
BlockContents contents;
contents.data = data_;
block_ = new Block(std::move(contents), kDisableGlobalSequenceNumber);
return Status::OK();
}
InternalIterator* NewIterator(
const SliceTransform* /*prefix_extractor*/) const override {
return block_->NewDataIterator(comparator_, comparator_);
}
private:
const Comparator* comparator_;
std::string data_;
Block* block_;
BlockConstructor();
};
// A helper class that converts internal format keys into user keys
class KeyConvertingIterator : public InternalIterator {
public:
explicit KeyConvertingIterator(InternalIterator* iter,
bool arena_mode = false)
: iter_(iter), arena_mode_(arena_mode) {}
~KeyConvertingIterator() override {
if (arena_mode_) {
iter_->~InternalIterator();
} else {
delete iter_;
}
}
bool Valid() const override { return iter_->Valid() && status_.ok(); }
void Seek(const Slice& target) override {
ParsedInternalKey ikey(target, kMaxSequenceNumber, kTypeValue);
std::string encoded;
AppendInternalKey(&encoded, ikey);
iter_->Seek(encoded);
}
void SeekForPrev(const Slice& target) override {
ParsedInternalKey ikey(target, kMaxSequenceNumber, kTypeValue);
std::string encoded;
AppendInternalKey(&encoded, ikey);
iter_->SeekForPrev(encoded);
}
void SeekToFirst() override { iter_->SeekToFirst(); }
void SeekToLast() override { iter_->SeekToLast(); }
void Next() override { iter_->Next(); }
void Prev() override { iter_->Prev(); }
bool IsOutOfBound() override { return iter_->IsOutOfBound(); }
Slice key() const override {
assert(Valid());
ParsedInternalKey parsed_key;
if (!ParseInternalKey(iter_->key(), &parsed_key)) {
status_ = Status::Corruption("malformed internal key");
return Slice("corrupted key");
}
return parsed_key.user_key;
}
Slice value() const override { return iter_->value(); }
Status status() const override {
return status_.ok() ? iter_->status() : status_;
}
private:
mutable Status status_;
InternalIterator* iter_;
bool arena_mode_;
// No copying allowed
KeyConvertingIterator(const KeyConvertingIterator&);
void operator=(const KeyConvertingIterator&);
};
class TableConstructor: public Constructor {
public:
explicit TableConstructor(const Comparator* cmp,
bool convert_to_internal_key = false,
int level = -1, SequenceNumber largest_seqno = 0)
: Constructor(cmp),
largest_seqno_(largest_seqno),
convert_to_internal_key_(convert_to_internal_key),
level_(level) {
env_ = rocksdb::Env::Default();
}
~TableConstructor() override { Reset(); }
Status FinishImpl(const Options& options, const ImmutableCFOptions& ioptions,
const MutableCFOptions& moptions,
const BlockBasedTableOptions& /*table_options*/,
const InternalKeyComparator& internal_comparator,
const stl_wrappers::KVMap& kv_map) override {
Reset();
soptions.use_mmap_reads = ioptions.allow_mmap_reads;
file_writer_.reset(test::GetWritableFileWriter(new test::StringSink(),
"" /* don't care */));
std::unique_ptr<TableBuilder> builder;
std::vector<std::unique_ptr<IntTblPropCollectorFactory>>
int_tbl_prop_collector_factories;
if (largest_seqno_ != 0) {
// Pretend that it's an external file written by SstFileWriter.
int_tbl_prop_collector_factories.emplace_back(
new SstFileWriterPropertiesCollectorFactory(2 /* version */,
0 /* global_seqno*/));
}
std::string column_family_name;
builder.reset(ioptions.table_factory->NewTableBuilder(
TableBuilderOptions(ioptions, moptions, internal_comparator,
&int_tbl_prop_collector_factories,
options.compression, options.sample_for_compression,
options.compression_opts, false /* skip_filters */,
column_family_name, level_),
TablePropertiesCollectorFactory::Context::kUnknownColumnFamily,
file_writer_.get()));
for (const auto kv : kv_map) {
if (convert_to_internal_key_) {
ParsedInternalKey ikey(kv.first, kMaxSequenceNumber, kTypeValue);
std::string encoded;
AppendInternalKey(&encoded, ikey);
builder->Add(encoded, kv.second);
} else {
builder->Add(kv.first, kv.second);
}
EXPECT_TRUE(builder->status().ok());
}
Status s = builder->Finish();
file_writer_->Flush();
EXPECT_TRUE(s.ok()) << s.ToString();
EXPECT_EQ(TEST_GetSink()->contents().size(), builder->FileSize());
// Open the table
uniq_id_ = cur_uniq_id_++;
file_reader_.reset(test::GetRandomAccessFileReader(new test::StringSource(
TEST_GetSink()->contents(), uniq_id_, ioptions.allow_mmap_reads)));
const bool kSkipFilters = true;
const bool kImmortal = true;
return ioptions.table_factory->NewTableReader(
TableReaderOptions(ioptions, moptions.prefix_extractor.get(), soptions,
internal_comparator, !kSkipFilters, !kImmortal,
level_, largest_seqno_, &block_cache_tracer_),
std::move(file_reader_), TEST_GetSink()->contents().size(),
&table_reader_);
}
InternalIterator* NewIterator(
const SliceTransform* prefix_extractor) const override {
ReadOptions ro;
InternalIterator* iter = table_reader_->NewIterator(
ro, prefix_extractor, /*arena=*/nullptr, /*skip_filters=*/false,
TableReaderCaller::kUncategorized);
if (convert_to_internal_key_) {
return new KeyConvertingIterator(iter);
} else {
return iter;
}
}
uint64_t ApproximateOffsetOf(const Slice& key) const {
if (convert_to_internal_key_) {
InternalKey ikey(key, kMaxSequenceNumber, kTypeValue);
const Slice skey = ikey.Encode();
return table_reader_->ApproximateOffsetOf(
skey, TableReaderCaller::kUncategorized);
}
return table_reader_->ApproximateOffsetOf(
key, TableReaderCaller::kUncategorized);
}
virtual Status Reopen(const ImmutableCFOptions& ioptions,
const MutableCFOptions& moptions) {
file_reader_.reset(test::GetRandomAccessFileReader(new test::StringSource(
TEST_GetSink()->contents(), uniq_id_, ioptions.allow_mmap_reads)));
return ioptions.table_factory->NewTableReader(
TableReaderOptions(ioptions, moptions.prefix_extractor.get(), soptions,
*last_internal_key_),
std::move(file_reader_), TEST_GetSink()->contents().size(),
&table_reader_);
}
virtual TableReader* GetTableReader() { return table_reader_.get(); }
bool AnywayDeleteIterator() const override {
return convert_to_internal_key_;
}
void ResetTableReader() { table_reader_.reset(); }
bool ConvertToInternalKey() { return convert_to_internal_key_; }
test::StringSink* TEST_GetSink() {
return rocksdb::test::GetStringSinkFromLegacyWriter(file_writer_.get());
}
BlockCacheTracer block_cache_tracer_;
private:
void Reset() {
uniq_id_ = 0;
table_reader_.reset();
file_writer_.reset();
file_reader_.reset();
}
uint64_t uniq_id_;
std::unique_ptr<WritableFileWriter> file_writer_;
std::unique_ptr<RandomAccessFileReader> file_reader_;
std::unique_ptr<TableReader> table_reader_;
SequenceNumber largest_seqno_;
bool convert_to_internal_key_;
int level_;
TableConstructor();
static uint64_t cur_uniq_id_;
EnvOptions soptions;
Env* env_;
};
uint64_t TableConstructor::cur_uniq_id_ = 1;
class MemTableConstructor: public Constructor {
public:
explicit MemTableConstructor(const Comparator* cmp, WriteBufferManager* wb)
: Constructor(cmp),
internal_comparator_(cmp),
write_buffer_manager_(wb),
table_factory_(new SkipListFactory) {
options_.memtable_factory = table_factory_;
ImmutableCFOptions ioptions(options_);
memtable_ =
new MemTable(internal_comparator_, ioptions, MutableCFOptions(options_),
wb, kMaxSequenceNumber, 0 /* column_family_id */);
memtable_->Ref();
}
~MemTableConstructor() override { delete memtable_->Unref(); }
Status FinishImpl(const Options&, const ImmutableCFOptions& ioptions,
const MutableCFOptions& /*moptions*/,
const BlockBasedTableOptions& /*table_options*/,
const InternalKeyComparator& /*internal_comparator*/,
const stl_wrappers::KVMap& kv_map) override {
delete memtable_->Unref();
ImmutableCFOptions mem_ioptions(ioptions);
memtable_ = new MemTable(internal_comparator_, mem_ioptions,
MutableCFOptions(options_), write_buffer_manager_,
kMaxSequenceNumber, 0 /* column_family_id */);
memtable_->Ref();
int seq = 1;
for (const auto kv : kv_map) {
memtable_->Add(seq, kTypeValue, kv.first, kv.second);
seq++;
}
return Status::OK();
}
InternalIterator* NewIterator(
const SliceTransform* /*prefix_extractor*/) const override {
return new KeyConvertingIterator(
memtable_->NewIterator(ReadOptions(), &arena_), true);
}
bool AnywayDeleteIterator() const override { return true; }
bool IsArenaMode() const override { return true; }
private:
mutable Arena arena_;
InternalKeyComparator internal_comparator_;
Options options_;
WriteBufferManager* write_buffer_manager_;
MemTable* memtable_;
std::shared_ptr<SkipListFactory> table_factory_;
};
class InternalIteratorFromIterator : public InternalIterator {
public:
explicit InternalIteratorFromIterator(Iterator* it) : it_(it) {}
bool Valid() const override { return it_->Valid(); }
void Seek(const Slice& target) override { it_->Seek(target); }
void SeekForPrev(const Slice& target) override { it_->SeekForPrev(target); }
void SeekToFirst() override { it_->SeekToFirst(); }
void SeekToLast() override { it_->SeekToLast(); }
void Next() override { it_->Next(); }
void Prev() override { it_->Prev(); }
Slice key() const override { return it_->key(); }
Slice value() const override { return it_->value(); }
Status status() const override { return it_->status(); }
private:
std::unique_ptr<Iterator> it_;
};
class DBConstructor: public Constructor {
public:
explicit DBConstructor(const Comparator* cmp)
: Constructor(cmp),
comparator_(cmp) {
db_ = nullptr;
NewDB();
}
~DBConstructor() override { delete db_; }
Status FinishImpl(const Options& /*options*/,
const ImmutableCFOptions& /*ioptions*/,
const MutableCFOptions& /*moptions*/,
const BlockBasedTableOptions& /*table_options*/,
const InternalKeyComparator& /*internal_comparator*/,
const stl_wrappers::KVMap& kv_map) override {
delete db_;
db_ = nullptr;
NewDB();
for (const auto kv : kv_map) {
WriteBatch batch;
batch.Put(kv.first, kv.second);
EXPECT_TRUE(db_->Write(WriteOptions(), &batch).ok());
}
return Status::OK();
}
InternalIterator* NewIterator(
const SliceTransform* /*prefix_extractor*/) const override {
return new InternalIteratorFromIterator(db_->NewIterator(ReadOptions()));
}
DB* db() const override { return db_; }
private:
void NewDB() {
std::string name = test::PerThreadDBPath("table_testdb");
Options options;
options.comparator = comparator_;
Status status = DestroyDB(name, options);
ASSERT_TRUE(status.ok()) << status.ToString();
options.create_if_missing = true;
options.error_if_exists = true;
options.write_buffer_size = 10000; // Something small to force merging
status = DB::Open(options, name, &db_);
ASSERT_TRUE(status.ok()) << status.ToString();
}
const Comparator* comparator_;
DB* db_;
};
enum TestType {
BLOCK_BASED_TABLE_TEST,
#ifndef ROCKSDB_LITE
PLAIN_TABLE_SEMI_FIXED_PREFIX,
PLAIN_TABLE_FULL_STR_PREFIX,
PLAIN_TABLE_TOTAL_ORDER,
#endif // !ROCKSDB_LITE
BLOCK_TEST,
MEMTABLE_TEST,
DB_TEST
};
struct TestArgs {
TestType type;
bool reverse_compare;
int restart_interval;
CompressionType compression;
uint32_t format_version;
bool use_mmap;
};
static std::vector<TestArgs> GenerateArgList() {
std::vector<TestArgs> test_args;
std::vector<TestType> test_types = {
BLOCK_BASED_TABLE_TEST,
#ifndef ROCKSDB_LITE
PLAIN_TABLE_SEMI_FIXED_PREFIX,
PLAIN_TABLE_FULL_STR_PREFIX,
PLAIN_TABLE_TOTAL_ORDER,
#endif // !ROCKSDB_LITE
BLOCK_TEST,
MEMTABLE_TEST, DB_TEST};
std::vector<bool> reverse_compare_types = {false, true};
std::vector<int> restart_intervals = {16, 1, 1024};
// Only add compression if it is supported
std::vector<std::pair<CompressionType, bool>> compression_types;
compression_types.emplace_back(kNoCompression, false);
if (Snappy_Supported()) {
compression_types.emplace_back(kSnappyCompression, false);
}
if (Zlib_Supported()) {
compression_types.emplace_back(kZlibCompression, false);
compression_types.emplace_back(kZlibCompression, true);
}
if (BZip2_Supported()) {
compression_types.emplace_back(kBZip2Compression, false);
compression_types.emplace_back(kBZip2Compression, true);
}
if (LZ4_Supported()) {
compression_types.emplace_back(kLZ4Compression, false);
compression_types.emplace_back(kLZ4Compression, true);
compression_types.emplace_back(kLZ4HCCompression, false);
compression_types.emplace_back(kLZ4HCCompression, true);
}
if (XPRESS_Supported()) {
compression_types.emplace_back(kXpressCompression, false);
compression_types.emplace_back(kXpressCompression, true);
}
if (ZSTD_Supported()) {
compression_types.emplace_back(kZSTD, false);
compression_types.emplace_back(kZSTD, true);
}
for (auto test_type : test_types) {
for (auto reverse_compare : reverse_compare_types) {
#ifndef ROCKSDB_LITE
if (test_type == PLAIN_TABLE_SEMI_FIXED_PREFIX ||
test_type == PLAIN_TABLE_FULL_STR_PREFIX ||
test_type == PLAIN_TABLE_TOTAL_ORDER) {
// Plain table doesn't use restart index or compression.
TestArgs one_arg;
one_arg.type = test_type;
one_arg.reverse_compare = reverse_compare;
one_arg.restart_interval = restart_intervals[0];
one_arg.compression = compression_types[0].first;
one_arg.use_mmap = true;
test_args.push_back(one_arg);
one_arg.use_mmap = false;
test_args.push_back(one_arg);
continue;
}
#endif // !ROCKSDB_LITE
for (auto restart_interval : restart_intervals) {
for (auto compression_type : compression_types) {
TestArgs one_arg;
one_arg.type = test_type;
one_arg.reverse_compare = reverse_compare;
one_arg.restart_interval = restart_interval;
one_arg.compression = compression_type.first;
one_arg.format_version = compression_type.second ? 2 : 1;
one_arg.use_mmap = false;
test_args.push_back(one_arg);
}
}
}
}
return test_args;
}
// In order to make all tests run for plain table format, including
// those operating on empty keys, create a new prefix transformer which
// return fixed prefix if the slice is not shorter than the prefix length,
// and the full slice if it is shorter.
class FixedOrLessPrefixTransform : public SliceTransform {
private:
const size_t prefix_len_;
public:
explicit FixedOrLessPrefixTransform(size_t prefix_len) :
prefix_len_(prefix_len) {
}
const char* Name() const override { return "rocksdb.FixedPrefix"; }
Slice Transform(const Slice& src) const override {
assert(InDomain(src));
if (src.size() < prefix_len_) {
return src;
}
return Slice(src.data(), prefix_len_);
}
bool InDomain(const Slice& /*src*/) const override { return true; }
bool InRange(const Slice& dst) const override {
return (dst.size() <= prefix_len_);
}
bool FullLengthEnabled(size_t* /*len*/) const override { return false; }
};
class HarnessTest : public testing::Test {
public:
HarnessTest()
: ioptions_(options_),
moptions_(options_),
constructor_(nullptr),
write_buffer_(options_.db_write_buffer_size) {}
void Init(const TestArgs& args) {
delete constructor_;
constructor_ = nullptr;
options_ = Options();
options_.compression = args.compression;
// Use shorter block size for tests to exercise block boundary
// conditions more.
if (args.reverse_compare) {
options_.comparator = &reverse_key_comparator;
}
internal_comparator_.reset(
new test::PlainInternalKeyComparator(options_.comparator));
support_prev_ = true;
only_support_prefix_seek_ = false;
options_.allow_mmap_reads = args.use_mmap;
switch (args.type) {
case BLOCK_BASED_TABLE_TEST:
table_options_.flush_block_policy_factory.reset(
new FlushBlockBySizePolicyFactory());
table_options_.block_size = 256;
table_options_.block_restart_interval = args.restart_interval;
table_options_.index_block_restart_interval = args.restart_interval;
table_options_.format_version = args.format_version;
options_.table_factory.reset(
new BlockBasedTableFactory(table_options_));
constructor_ = new TableConstructor(
options_.comparator, true /* convert_to_internal_key_ */);
internal_comparator_.reset(
new InternalKeyComparator(options_.comparator));
break;
// Plain table is not supported in ROCKSDB_LITE
#ifndef ROCKSDB_LITE
case PLAIN_TABLE_SEMI_FIXED_PREFIX:
support_prev_ = false;
only_support_prefix_seek_ = true;
options_.prefix_extractor.reset(new FixedOrLessPrefixTransform(2));
options_.table_factory.reset(NewPlainTableFactory());
constructor_ = new TableConstructor(
options_.comparator, true /* convert_to_internal_key_ */);
internal_comparator_.reset(
new InternalKeyComparator(options_.comparator));
break;
case PLAIN_TABLE_FULL_STR_PREFIX:
support_prev_ = false;
only_support_prefix_seek_ = true;
options_.prefix_extractor.reset(NewNoopTransform());
options_.table_factory.reset(NewPlainTableFactory());
constructor_ = new TableConstructor(
options_.comparator, true /* convert_to_internal_key_ */);
internal_comparator_.reset(
new InternalKeyComparator(options_.comparator));
break;
case PLAIN_TABLE_TOTAL_ORDER:
support_prev_ = false;
only_support_prefix_seek_ = false;
options_.prefix_extractor = nullptr;
{
PlainTableOptions plain_table_options;
plain_table_options.user_key_len = kPlainTableVariableLength;
plain_table_options.bloom_bits_per_key = 0;
plain_table_options.hash_table_ratio = 0;
options_.table_factory.reset(
NewPlainTableFactory(plain_table_options));
}
constructor_ = new TableConstructor(
options_.comparator, true /* convert_to_internal_key_ */);
internal_comparator_.reset(
new InternalKeyComparator(options_.comparator));
break;
#endif // !ROCKSDB_LITE
case BLOCK_TEST:
table_options_.block_size = 256;
options_.table_factory.reset(
new BlockBasedTableFactory(table_options_));
constructor_ = new BlockConstructor(options_.comparator);
break;
case MEMTABLE_TEST:
table_options_.block_size = 256;
options_.table_factory.reset(
new BlockBasedTableFactory(table_options_));
constructor_ = new MemTableConstructor(options_.comparator,
&write_buffer_);
break;
case DB_TEST:
table_options_.block_size = 256;
options_.table_factory.reset(
new BlockBasedTableFactory(table_options_));
constructor_ = new DBConstructor(options_.comparator);
break;
}
ioptions_ = ImmutableCFOptions(options_);
moptions_ = MutableCFOptions(options_);
}
~HarnessTest() override { delete constructor_; }
void Add(const std::string& key, const std::string& value) {
constructor_->Add(key, value);
}
void Test(Random* rnd) {
std::vector<std::string> keys;
stl_wrappers::KVMap data;
constructor_->Finish(options_, ioptions_, moptions_, table_options_,
*internal_comparator_, &keys, &data);
TestForwardScan(keys, data);
if (support_prev_) {
TestBackwardScan(keys, data);
}
TestRandomAccess(rnd, keys, data);
}
void TestForwardScan(const std::vector<std::string>& /*keys*/,
const stl_wrappers::KVMap& data) {
InternalIterator* iter = constructor_->NewIterator();
ASSERT_TRUE(!iter->Valid());
iter->SeekToFirst();
for (stl_wrappers::KVMap::const_iterator model_iter = data.begin();
model_iter != data.end(); ++model_iter) {
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
iter->Next();
}
ASSERT_TRUE(!iter->Valid());
if (constructor_->IsArenaMode() && !constructor_->AnywayDeleteIterator()) {
iter->~InternalIterator();
} else {
delete iter;
}
}
void TestBackwardScan(const std::vector<std::string>& /*keys*/,
const stl_wrappers::KVMap& data) {
InternalIterator* iter = constructor_->NewIterator();
ASSERT_TRUE(!iter->Valid());
iter->SeekToLast();
for (stl_wrappers::KVMap::const_reverse_iterator model_iter = data.rbegin();
model_iter != data.rend(); ++model_iter) {
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
iter->Prev();
}
ASSERT_TRUE(!iter->Valid());
if (constructor_->IsArenaMode() && !constructor_->AnywayDeleteIterator()) {
iter->~InternalIterator();
} else {
delete iter;
}
}
void TestRandomAccess(Random* rnd, const std::vector<std::string>& keys,
const stl_wrappers::KVMap& data) {
static const bool kVerbose = false;
InternalIterator* iter = constructor_->NewIterator();
ASSERT_TRUE(!iter->Valid());
stl_wrappers::KVMap::const_iterator model_iter = data.begin();
if (kVerbose) fprintf(stderr, "---\n");
for (int i = 0; i < 200; i++) {
const int toss = rnd->Uniform(support_prev_ ? 5 : 3);
switch (toss) {
case 0: {
if (iter->Valid()) {
if (kVerbose) fprintf(stderr, "Next\n");
iter->Next();
++model_iter;
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
}
break;
}
case 1: {
if (kVerbose) fprintf(stderr, "SeekToFirst\n");
iter->SeekToFirst();
model_iter = data.begin();
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
break;
}
case 2: {
std::string key = PickRandomKey(rnd, keys);
model_iter = data.lower_bound(key);
if (kVerbose) fprintf(stderr, "Seek '%s'\n",
EscapeString(key).c_str());
iter->Seek(Slice(key));
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
break;
}
case 3: {
if (iter->Valid()) {
if (kVerbose) fprintf(stderr, "Prev\n");
iter->Prev();
if (model_iter == data.begin()) {
model_iter = data.end(); // Wrap around to invalid value
} else {
--model_iter;
}
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
}
break;
}
case 4: {
if (kVerbose) fprintf(stderr, "SeekToLast\n");
iter->SeekToLast();
if (keys.empty()) {
model_iter = data.end();
} else {
std::string last = data.rbegin()->first;
model_iter = data.lower_bound(last);
}
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
break;
}
}
}
if (constructor_->IsArenaMode() && !constructor_->AnywayDeleteIterator()) {
iter->~InternalIterator();
} else {
delete iter;
}
}
std::string ToString(const stl_wrappers::KVMap& data,
const stl_wrappers::KVMap::const_iterator& it) {
if (it == data.end()) {
return "END";
} else {
return "'" + it->first + "->" + it->second + "'";
}
}
std::string ToString(const stl_wrappers::KVMap& data,
const stl_wrappers::KVMap::const_reverse_iterator& it) {
if (it == data.rend()) {
return "END";
} else {
return "'" + it->first + "->" + it->second + "'";
}
}
std::string ToString(const InternalIterator* it) {
if (!it->Valid()) {
return "END";
} else {
return "'" + it->key().ToString() + "->" + it->value().ToString() + "'";
}
}
std::string PickRandomKey(Random* rnd, const std::vector<std::string>& keys) {
if (keys.empty()) {
return "foo";
} else {
const int index = rnd->Uniform(static_cast<int>(keys.size()));
std::string result = keys[index];
switch (rnd->Uniform(support_prev_ ? 3 : 1)) {
case 0:
// Return an existing key
break;
case 1: {
// Attempt to return something smaller than an existing key
if (result.size() > 0 && result[result.size() - 1] > '\0'
&& (!only_support_prefix_seek_
|| options_.prefix_extractor->Transform(result).size()
< result.size())) {
result[result.size() - 1]--;
}
break;
}
case 2: {
// Return something larger than an existing key
Increment(options_.comparator, &result);
break;
}
}
return result;
}
}
// Returns nullptr if not running against a DB
DB* db() const { return constructor_->db(); }
void RandomizedHarnessTest(size_t part, size_t total) {
std::vector<TestArgs> args = GenerateArgList();
assert(part);
assert(part <= total);
for (size_t i = 0; i < args.size(); i++) {
if ((i % total) + 1 != part) {
continue;
}
Init(args[i]);
Random rnd(test::RandomSeed() + 5);
for (int num_entries = 0; num_entries < 2000;
num_entries += (num_entries < 50 ? 1 : 200)) {
for (int e = 0; e < num_entries; e++) {
std::string v;
Add(test::RandomKey(&rnd, rnd.Skewed(4)),
test::RandomString(&rnd, rnd.Skewed(5), &v).ToString());
}
Test(&rnd);
}
}
}
private:
Options options_ = Options();
ImmutableCFOptions ioptions_;
MutableCFOptions moptions_;
BlockBasedTableOptions table_options_ = BlockBasedTableOptions();
Constructor* constructor_;
WriteBufferManager write_buffer_;
bool support_prev_;
bool only_support_prefix_seek_;
std::shared_ptr<InternalKeyComparator> internal_comparator_;
};
static bool Between(uint64_t val, uint64_t low, uint64_t high) {
bool result = (val >= low) && (val <= high);
if (!result) {
fprintf(stderr, "Value %llu is not in range [%llu, %llu]\n",
(unsigned long long)(val),
(unsigned long long)(low),
(unsigned long long)(high));
}
return result;
}
// Tests against all kinds of tables
class TableTest : public testing::Test {
public:
const InternalKeyComparator& GetPlainInternalComparator(
const Comparator* comp) {
if (!plain_internal_comparator) {
plain_internal_comparator.reset(
new test::PlainInternalKeyComparator(comp));
}
return *plain_internal_comparator;
}
void IndexTest(BlockBasedTableOptions table_options);
private:
std::unique_ptr<InternalKeyComparator> plain_internal_comparator;
};
class GeneralTableTest : public TableTest {};
class BlockBasedTableTest
: public TableTest,
virtual public ::testing::WithParamInterface<uint32_t> {
public:
BlockBasedTableTest() : format_(GetParam()) {
env_ = rocksdb::Env::Default();
}
BlockBasedTableOptions GetBlockBasedTableOptions() {
BlockBasedTableOptions options;
options.format_version = format_;
return options;
}
void SetupTracingTest(TableConstructor* c) {
test_path_ = test::PerThreadDBPath("block_based_table_tracing_test");
EXPECT_OK(env_->CreateDir(test_path_));
trace_file_path_ = test_path_ + "/block_cache_trace_file";
TraceOptions trace_opt;
std::unique_ptr<TraceWriter> trace_writer;
EXPECT_OK(NewFileTraceWriter(env_, EnvOptions(), trace_file_path_,
&trace_writer));
c->block_cache_tracer_.StartTrace(env_, trace_opt, std::move(trace_writer));
{
std::string user_key = "k01";
InternalKey internal_key(user_key, 0, kTypeValue);
std::string encoded_key = internal_key.Encode().ToString();
c->Add(encoded_key, kDummyValue);
}
{
std::string user_key = "k02";
InternalKey internal_key(user_key, 0, kTypeValue);
std::string encoded_key = internal_key.Encode().ToString();
c->Add(encoded_key, kDummyValue);
}
}
void VerifyBlockAccessTrace(
TableConstructor* c,
const std::vector<BlockCacheTraceRecord>& expected_records) {
c->block_cache_tracer_.EndTrace();
std::unique_ptr<TraceReader> trace_reader;
Status s =
NewFileTraceReader(env_, EnvOptions(), trace_file_path_, &trace_reader);
EXPECT_OK(s);
BlockCacheTraceReader reader(std::move(trace_reader));
BlockCacheTraceHeader header;
EXPECT_OK(reader.ReadHeader(&header));
uint32_t index = 0;
while (s.ok()) {
BlockCacheTraceRecord access;
s = reader.ReadAccess(&access);
if (!s.ok()) {
break;
}
ASSERT_LT(index, expected_records.size());
EXPECT_NE("", access.block_key);
EXPECT_EQ(access.block_type, expected_records[index].block_type);
EXPECT_GT(access.block_size, 0);
EXPECT_EQ(access.caller, expected_records[index].caller);
EXPECT_EQ(access.no_insert, expected_records[index].no_insert);
EXPECT_EQ(access.is_cache_hit, expected_records[index].is_cache_hit);
// Get
if (access.caller == TableReaderCaller::kUserGet) {
EXPECT_EQ(access.referenced_key,
expected_records[index].referenced_key);
EXPECT_EQ(access.get_id, expected_records[index].get_id);
EXPECT_EQ(access.get_from_user_specified_snapshot,
expected_records[index].get_from_user_specified_snapshot);
if (access.block_type == TraceType::kBlockTraceDataBlock) {
EXPECT_GT(access.referenced_data_size, 0);
EXPECT_GT(access.num_keys_in_block, 0);
EXPECT_EQ(access.referenced_key_exist_in_block,
expected_records[index].referenced_key_exist_in_block);
}
} else {
EXPECT_EQ(access.referenced_key, "");
EXPECT_EQ(access.get_id, 0);
EXPECT_TRUE(access.get_from_user_specified_snapshot == Boolean::kFalse);
EXPECT_EQ(access.referenced_data_size, 0);
EXPECT_EQ(access.num_keys_in_block, 0);
EXPECT_TRUE(access.referenced_key_exist_in_block == Boolean::kFalse);
}
index++;
}
EXPECT_EQ(index, expected_records.size());
EXPECT_OK(env_->DeleteFile(trace_file_path_));
EXPECT_OK(env_->DeleteDir(test_path_));
}
protected:
uint64_t IndexUncompressedHelper(bool indexCompress);
private:
uint32_t format_;
Env* env_;
std::string trace_file_path_;
std::string test_path_;
};
class PlainTableTest : public TableTest {};
class TablePropertyTest : public testing::Test {};
class BBTTailPrefetchTest : public TableTest {};
INSTANTIATE_TEST_CASE_P(FormatDef, BlockBasedTableTest,
testing::Values(test::kDefaultFormatVersion));
INSTANTIATE_TEST_CASE_P(FormatLatest, BlockBasedTableTest,
testing::Values(test::kLatestFormatVersion));
// This test serves as the living tutorial for the prefix scan of user collected
// properties.
TEST_F(TablePropertyTest, PrefixScanTest) {
UserCollectedProperties props{{"num.111.1", "1"},
{"num.111.2", "2"},
{"num.111.3", "3"},
{"num.333.1", "1"},
{"num.333.2", "2"},
{"num.333.3", "3"},
{"num.555.1", "1"},
{"num.555.2", "2"},
{"num.555.3", "3"}, };
// prefixes that exist
for (const std::string& prefix : {"num.111", "num.333", "num.555"}) {
int num = 0;
for (auto pos = props.lower_bound(prefix);
pos != props.end() &&
pos->first.compare(0, prefix.size(), prefix) == 0;
++pos) {
++num;
auto key = prefix + "." + ToString(num);
ASSERT_EQ(key, pos->first);
ASSERT_EQ(ToString(num), pos->second);
}
ASSERT_EQ(3, num);
}
// prefixes that don't exist
for (const std::string& prefix :
{"num.000", "num.222", "num.444", "num.666"}) {
auto pos = props.lower_bound(prefix);
ASSERT_TRUE(pos == props.end() ||
pos->first.compare(0, prefix.size(), prefix) != 0);
}
}
// This test include all the basic checks except those for index size and block
// size, which will be conducted in separated unit tests.
TEST_P(BlockBasedTableTest, BasicBlockBasedTableProperties) {
TableConstructor c(BytewiseComparator(), true /* convert_to_internal_key_ */);
c.Add("a1", "val1");
c.Add("b2", "val2");
c.Add("c3", "val3");
c.Add("d4", "val4");
c.Add("e5", "val5");
c.Add("f6", "val6");
c.Add("g7", "val7");
c.Add("h8", "val8");
c.Add("j9", "val9");
uint64_t diff_internal_user_bytes = 9 * 8; // 8 is seq size, 9 k-v totally
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
Options options;
options.compression = kNoCompression;
options.statistics = CreateDBStatistics();
options.statistics->set_stats_level(StatsLevel::kAll);
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.block_restart_interval = 1;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
ImmutableCFOptions ioptions(options);
MutableCFOptions moptions(options);
ioptions.statistics = options.statistics.get();
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
ASSERT_EQ(options.statistics->getTickerCount(NUMBER_BLOCK_NOT_COMPRESSED), 0);
auto& props = *c.GetTableReader()->GetTableProperties();
ASSERT_EQ(kvmap.size(), props.num_entries);
auto raw_key_size = kvmap.size() * 2ul;
auto raw_value_size = kvmap.size() * 4ul;
ASSERT_EQ(raw_key_size + diff_internal_user_bytes, props.raw_key_size);
ASSERT_EQ(raw_value_size, props.raw_value_size);
ASSERT_EQ(1ul, props.num_data_blocks);
ASSERT_EQ("", props.filter_policy_name); // no filter policy is used
// Verify data size.
BlockBuilder block_builder(1);
for (const auto& item : kvmap) {
block_builder.Add(item.first, item.second);
}
Slice content = block_builder.Finish();
ASSERT_EQ(content.size() + kBlockTrailerSize + diff_internal_user_bytes,
props.data_size);
c.ResetTableReader();
}
#ifdef SNAPPY
uint64_t BlockBasedTableTest::IndexUncompressedHelper(bool compressed) {
TableConstructor c(BytewiseComparator(), true /* convert_to_internal_key_ */);
constexpr size_t kNumKeys = 10000;
for (size_t k = 0; k < kNumKeys; ++k) {
c.Add("key" + ToString(k), "val" + ToString(k));
}
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
Options options;
options.compression = kSnappyCompression;
options.statistics = CreateDBStatistics();
options.statistics->set_stats_level(StatsLevel::kAll);
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.block_restart_interval = 1;
table_options.enable_index_compression = compressed;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
ImmutableCFOptions ioptions(options);
MutableCFOptions moptions(options);
ioptions.statistics = options.statistics.get();
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
c.ResetTableReader();
return options.statistics->getTickerCount(NUMBER_BLOCK_COMPRESSED);
}
TEST_P(BlockBasedTableTest, IndexUncompressed) {
uint64_t tbl1_compressed_cnt = IndexUncompressedHelper(true);
uint64_t tbl2_compressed_cnt = IndexUncompressedHelper(false);
// tbl1_compressed_cnt should include 1 index block
EXPECT_EQ(tbl2_compressed_cnt + 1, tbl1_compressed_cnt);
}
#endif // SNAPPY
TEST_P(BlockBasedTableTest, BlockBasedTableProperties2) {
TableConstructor c(&reverse_key_comparator);
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
{
Options options;
options.compression = CompressionType::kNoCompression;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
auto& props = *c.GetTableReader()->GetTableProperties();
// Default comparator
ASSERT_EQ("leveldb.BytewiseComparator", props.comparator_name);
// No merge operator
ASSERT_EQ("nullptr", props.merge_operator_name);
// No prefix extractor
ASSERT_EQ("nullptr", props.prefix_extractor_name);
// No property collectors
ASSERT_EQ("[]", props.property_collectors_names);
// No filter policy is used
ASSERT_EQ("", props.filter_policy_name);
// Compression type == that set:
ASSERT_EQ("NoCompression", props.compression_name);
c.ResetTableReader();
}
{
Options options;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
options.comparator = &reverse_key_comparator;
options.merge_operator = MergeOperators::CreateUInt64AddOperator();
options.prefix_extractor.reset(NewNoopTransform());
options.table_properties_collector_factories.emplace_back(
new DummyPropertiesCollectorFactory1());
options.table_properties_collector_factories.emplace_back(
new DummyPropertiesCollectorFactory2());
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
auto& props = *c.GetTableReader()->GetTableProperties();
ASSERT_EQ("rocksdb.ReverseBytewiseComparator", props.comparator_name);
ASSERT_EQ("UInt64AddOperator", props.merge_operator_name);
ASSERT_EQ("rocksdb.Noop", props.prefix_extractor_name);
ASSERT_EQ("[DummyPropertiesCollector1,DummyPropertiesCollector2]",
props.property_collectors_names);
ASSERT_EQ("", props.filter_policy_name); // no filter policy is used
c.ResetTableReader();
}
}
TEST_P(BlockBasedTableTest, RangeDelBlock) {
TableConstructor c(BytewiseComparator());
std::vector<std::string> keys = {"1pika", "2chu"};
std::vector<std::string> vals = {"p", "c"};
std::vector<RangeTombstone> expected_tombstones = {
{"1pika", "2chu", 0},
{"2chu", "c", 1},
{"2chu", "c", 0},
{"c", "p", 0},
};
for (int i = 0; i < 2; i++) {
RangeTombstone t(keys[i], vals[i], i);
std::pair<InternalKey, Slice> p = t.Serialize();
c.Add(p.first.Encode().ToString(), p.second);
}
std::vector<std::string> sorted_keys;
stl_wrappers::KVMap kvmap;
Options options;
options.compression = kNoCompression;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.block_restart_interval = 1;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
std::unique_ptr<InternalKeyComparator> internal_cmp(
new InternalKeyComparator(options.comparator));
c.Finish(options, ioptions, moptions, table_options, *internal_cmp,
&sorted_keys, &kvmap);
for (int j = 0; j < 2; ++j) {
std::unique_ptr<InternalIterator> iter(
c.GetTableReader()->NewRangeTombstoneIterator(ReadOptions()));
if (j > 0) {
// For second iteration, delete the table reader object and verify the
// iterator can still access its metablock's range tombstones.
c.ResetTableReader();
}
ASSERT_FALSE(iter->Valid());
iter->SeekToFirst();
ASSERT_TRUE(iter->Valid());
for (size_t i = 0; i < expected_tombstones.size(); i++) {
ASSERT_TRUE(iter->Valid());
ParsedInternalKey parsed_key;
ASSERT_TRUE(ParseInternalKey(iter->key(), &parsed_key));
RangeTombstone t(parsed_key, iter->value());
const auto& expected_t = expected_tombstones[i];
ASSERT_EQ(t.start_key_, expected_t.start_key_);
ASSERT_EQ(t.end_key_, expected_t.end_key_);
ASSERT_EQ(t.seq_, expected_t.seq_);
iter->Next();
}
ASSERT_TRUE(!iter->Valid());
}
}
TEST_P(BlockBasedTableTest, FilterPolicyNameProperties) {
TableConstructor c(BytewiseComparator(), true /* convert_to_internal_key_ */);
c.Add("a1", "val1");
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.filter_policy.reset(NewBloomFilterPolicy(10));
Options options;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
auto& props = *c.GetTableReader()->GetTableProperties();
ASSERT_EQ("rocksdb.BuiltinBloomFilter", props.filter_policy_name);
c.ResetTableReader();
}
//
// BlockBasedTableTest::PrefetchTest
//
void AssertKeysInCache(BlockBasedTable* table_reader,
const std::vector<std::string>& keys_in_cache,
const std::vector<std::string>& keys_not_in_cache,
bool convert = false) {
if (convert) {
for (auto key : keys_in_cache) {
InternalKey ikey(key, kMaxSequenceNumber, kTypeValue);
ASSERT_TRUE(table_reader->TEST_KeyInCache(ReadOptions(), ikey.Encode()));
}
for (auto key : keys_not_in_cache) {
InternalKey ikey(key, kMaxSequenceNumber, kTypeValue);
ASSERT_TRUE(!table_reader->TEST_KeyInCache(ReadOptions(), ikey.Encode()));
}
} else {
for (auto key : keys_in_cache) {
ASSERT_TRUE(table_reader->TEST_KeyInCache(ReadOptions(), key));
}
for (auto key : keys_not_in_cache) {
ASSERT_TRUE(!table_reader->TEST_KeyInCache(ReadOptions(), key));
}
}
}
void PrefetchRange(TableConstructor* c, Options* opt,
BlockBasedTableOptions* table_options, const char* key_begin,
const char* key_end,
const std::vector<std::string>& keys_in_cache,
const std::vector<std::string>& keys_not_in_cache,
const Status expected_status = Status::OK()) {
// reset the cache and reopen the table
table_options->block_cache = NewLRUCache(16 * 1024 * 1024, 4);
opt->table_factory.reset(NewBlockBasedTableFactory(*table_options));
const ImmutableCFOptions ioptions2(*opt);
const MutableCFOptions moptions(*opt);
ASSERT_OK(c->Reopen(ioptions2, moptions));
// prefetch
auto* table_reader = dynamic_cast<BlockBasedTable*>(c->GetTableReader());
Status s;
std::unique_ptr<Slice> begin, end;
std::unique_ptr<InternalKey> i_begin, i_end;
if (key_begin != nullptr) {
if (c->ConvertToInternalKey()) {
i_begin.reset(new InternalKey(key_begin, kMaxSequenceNumber, kTypeValue));
begin.reset(new Slice(i_begin->Encode()));
} else {
begin.reset(new Slice(key_begin));
}
}
if (key_end != nullptr) {
if (c->ConvertToInternalKey()) {
i_end.reset(new InternalKey(key_end, kMaxSequenceNumber, kTypeValue));
end.reset(new Slice(i_end->Encode()));
} else {
end.reset(new Slice(key_end));
}
}
s = table_reader->Prefetch(begin.get(), end.get());
ASSERT_TRUE(s.code() == expected_status.code());
// assert our expectation in cache warmup
AssertKeysInCache(table_reader, keys_in_cache, keys_not_in_cache,
c->ConvertToInternalKey());
c->ResetTableReader();
}
TEST_P(BlockBasedTableTest, PrefetchTest) {
// The purpose of this test is to test the prefetching operation built into
// BlockBasedTable.
Options opt;
std::unique_ptr<InternalKeyComparator> ikc;
ikc.reset(new test::PlainInternalKeyComparator(opt.comparator));
opt.compression = kNoCompression;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.block_size = 1024;
// big enough so we don't ever lose cached values.
table_options.block_cache = NewLRUCache(16 * 1024 * 1024, 4);
opt.table_factory.reset(NewBlockBasedTableFactory(table_options));
TableConstructor c(BytewiseComparator(), true /* convert_to_internal_key_ */);
c.Add("k01", "hello");
c.Add("k02", "hello2");
c.Add("k03", std::string(10000, 'x'));
c.Add("k04", std::string(200000, 'x'));
c.Add("k05", std::string(300000, 'x'));
c.Add("k06", "hello3");
c.Add("k07", std::string(100000, 'x'));
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
const ImmutableCFOptions ioptions(opt);
const MutableCFOptions moptions(opt);
c.Finish(opt, ioptions, moptions, table_options, *ikc, &keys, &kvmap);
c.ResetTableReader();
// We get the following data spread :
//
// Data block Index
// ========================
// [ k01 k02 k03 ] k03
// [ k04 ] k04
// [ k05 ] k05
// [ k06 k07 ] k07
// Simple
PrefetchRange(&c, &opt, &table_options,
/*key_range=*/"k01", "k05",
/*keys_in_cache=*/{"k01", "k02", "k03", "k04", "k05"},
/*keys_not_in_cache=*/{"k06", "k07"});
PrefetchRange(&c, &opt, &table_options, "k01", "k01", {"k01", "k02", "k03"},
{"k04", "k05", "k06", "k07"});
// odd
PrefetchRange(&c, &opt, &table_options, "a", "z",
{"k01", "k02", "k03", "k04", "k05", "k06", "k07"}, {});
PrefetchRange(&c, &opt, &table_options, "k00", "k00", {"k01", "k02", "k03"},
{"k04", "k05", "k06", "k07"});
// Edge cases
PrefetchRange(&c, &opt, &table_options, "k00", "k06",
{"k01", "k02", "k03", "k04", "k05", "k06", "k07"}, {});
PrefetchRange(&c, &opt, &table_options, "k00", "zzz",
{"k01", "k02", "k03", "k04", "k05", "k06", "k07"}, {});
// null keys
PrefetchRange(&c, &opt, &table_options, nullptr, nullptr,
{"k01", "k02", "k03", "k04", "k05", "k06", "k07"}, {});
PrefetchRange(&c, &opt, &table_options, "k04", nullptr,
{"k04", "k05", "k06", "k07"}, {"k01", "k02", "k03"});
PrefetchRange(&c, &opt, &table_options, nullptr, "k05",
{"k01", "k02", "k03", "k04", "k05"}, {"k06", "k07"});
// invalid
PrefetchRange(&c, &opt, &table_options, "k06", "k00", {}, {},
Status::InvalidArgument(Slice("k06 "), Slice("k07")));
c.ResetTableReader();
}
TEST_P(BlockBasedTableTest, TotalOrderSeekOnHashIndex) {
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
for (int i = 0; i <= 5; ++i) {
Options options;
// Make each key/value an individual block
table_options.block_size = 64;
switch (i) {
case 0:
// Binary search index
table_options.index_type = BlockBasedTableOptions::kBinarySearch;
options.table_factory.reset(new BlockBasedTableFactory(table_options));
break;
case 1:
// Hash search index
table_options.index_type = BlockBasedTableOptions::kHashSearch;
options.table_factory.reset(new BlockBasedTableFactory(table_options));
options.prefix_extractor.reset(NewFixedPrefixTransform(4));
break;
case 2:
// Hash search index with hash_index_allow_collision
table_options.index_type = BlockBasedTableOptions::kHashSearch;
table_options.hash_index_allow_collision = true;
options.table_factory.reset(new BlockBasedTableFactory(table_options));
options.prefix_extractor.reset(NewFixedPrefixTransform(4));
break;
case 3:
// Hash search index with filter policy
table_options.index_type = BlockBasedTableOptions::kHashSearch;
table_options.filter_policy.reset(NewBloomFilterPolicy(10));
options.table_factory.reset(new BlockBasedTableFactory(table_options));
options.prefix_extractor.reset(NewFixedPrefixTransform(4));
break;
case 4:
// Two-level index
table_options.index_type = BlockBasedTableOptions::kTwoLevelIndexSearch;
options.table_factory.reset(new BlockBasedTableFactory(table_options));
break;
case 5:
// Binary search with first key
table_options.index_type =
BlockBasedTableOptions::kBinarySearchWithFirstKey;
options.table_factory.reset(new BlockBasedTableFactory(table_options));
break;
}
TableConstructor c(BytewiseComparator(),
true /* convert_to_internal_key_ */);
c.Add("aaaa1", std::string('a', 56));
c.Add("bbaa1", std::string('a', 56));
c.Add("cccc1", std::string('a', 56));
c.Add("bbbb1", std::string('a', 56));
c.Add("baaa1", std::string('a', 56));
c.Add("abbb1", std::string('a', 56));
c.Add("cccc2", std::string('a', 56));
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
auto props = c.GetTableReader()->GetTableProperties();
ASSERT_EQ(7u, props->num_data_blocks);
auto* reader = c.GetTableReader();
ReadOptions ro;
ro.total_order_seek = true;
std::unique_ptr<InternalIterator> iter(reader->NewIterator(
ro, moptions.prefix_extractor.get(), /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized));
iter->Seek(InternalKey("b", 0, kTypeValue).Encode());
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("baaa1", ExtractUserKey(iter->key()).ToString());
iter->Next();
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("bbaa1", ExtractUserKey(iter->key()).ToString());
iter->Seek(InternalKey("bb", 0, kTypeValue).Encode());
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("bbaa1", ExtractUserKey(iter->key()).ToString());
iter->Next();
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("bbbb1", ExtractUserKey(iter->key()).ToString());
iter->Seek(InternalKey("bbb", 0, kTypeValue).Encode());
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("bbbb1", ExtractUserKey(iter->key()).ToString());
iter->Next();
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("cccc1", ExtractUserKey(iter->key()).ToString());
}
}
TEST_P(BlockBasedTableTest, NoopTransformSeek) {
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.filter_policy.reset(NewBloomFilterPolicy(10));
Options options;
options.comparator = BytewiseComparator();
options.table_factory.reset(new BlockBasedTableFactory(table_options));
options.prefix_extractor.reset(NewNoopTransform());
TableConstructor c(options.comparator);
// To tickle the PrefixMayMatch bug it is important that the
// user-key is a single byte so that the index key exactly matches
// the user-key.
InternalKey key("a", 1, kTypeValue);
c.Add(key.Encode().ToString(), "b");
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
const InternalKeyComparator internal_comparator(options.comparator);
c.Finish(options, ioptions, moptions, table_options, internal_comparator,
&keys, &kvmap);
auto* reader = c.GetTableReader();
for (int i = 0; i < 2; ++i) {
ReadOptions ro;
ro.total_order_seek = (i == 0);
std::unique_ptr<InternalIterator> iter(reader->NewIterator(
ro, moptions.prefix_extractor.get(), /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized));
iter->Seek(key.Encode());
ASSERT_OK(iter->status());
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("a", ExtractUserKey(iter->key()).ToString());
}
}
TEST_P(BlockBasedTableTest, SkipPrefixBloomFilter) {
// if DB is opened with a prefix extractor of a different name,
// prefix bloom is skipped when read the file
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.filter_policy.reset(NewBloomFilterPolicy(2));
table_options.whole_key_filtering = false;
Options options;
options.comparator = BytewiseComparator();
options.table_factory.reset(new BlockBasedTableFactory(table_options));
options.prefix_extractor.reset(NewFixedPrefixTransform(1));
TableConstructor c(options.comparator);
InternalKey key("abcdefghijk", 1, kTypeValue);
c.Add(key.Encode().ToString(), "test");
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
const InternalKeyComparator internal_comparator(options.comparator);
c.Finish(options, ioptions, moptions, table_options, internal_comparator,
&keys, &kvmap);
// TODO(Zhongyi): update test to use MutableCFOptions
options.prefix_extractor.reset(NewFixedPrefixTransform(9));
const ImmutableCFOptions new_ioptions(options);
const MutableCFOptions new_moptions(options);
c.Reopen(new_ioptions, new_moptions);
auto reader = c.GetTableReader();
std::unique_ptr<InternalIterator> db_iter(reader->NewIterator(
ReadOptions(), new_moptions.prefix_extractor.get(), /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized));
// Test point lookup
// only one kv
for (auto& kv : kvmap) {
db_iter->Seek(kv.first);
ASSERT_TRUE(db_iter->Valid());
ASSERT_OK(db_iter->status());
ASSERT_EQ(db_iter->key(), kv.first);
ASSERT_EQ(db_iter->value(), kv.second);
}
}
static std::string RandomString(Random* rnd, int len) {
std::string r;
test::RandomString(rnd, len, &r);
return r;
}
void AddInternalKey(TableConstructor* c, const std::string& prefix,
std::string value = "v", int /*suffix_len*/ = 800) {
static Random rnd(1023);
InternalKey k(prefix + RandomString(&rnd, 800), 0, kTypeValue);
c->Add(k.Encode().ToString(), value);
}
void TableTest::IndexTest(BlockBasedTableOptions table_options) {
TableConstructor c(BytewiseComparator());
// keys with prefix length 3, make sure the key/value is big enough to fill
// one block
AddInternalKey(&c, "0015");
AddInternalKey(&c, "0035");
AddInternalKey(&c, "0054");
AddInternalKey(&c, "0055");
AddInternalKey(&c, "0056");
AddInternalKey(&c, "0057");
AddInternalKey(&c, "0058");
AddInternalKey(&c, "0075");
AddInternalKey(&c, "0076");
AddInternalKey(&c, "0095");
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
Options options;
options.prefix_extractor.reset(NewFixedPrefixTransform(3));
table_options.block_size = 1700;
table_options.block_cache = NewLRUCache(1024, 4);
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
std::unique_ptr<InternalKeyComparator> comparator(
new InternalKeyComparator(BytewiseComparator()));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options, *comparator, &keys,
&kvmap);
auto reader = c.GetTableReader();
auto props = reader->GetTableProperties();
ASSERT_EQ(5u, props->num_data_blocks);
// TODO(Zhongyi): update test to use MutableCFOptions
std::unique_ptr<InternalIterator> index_iter(reader->NewIterator(
ReadOptions(), moptions.prefix_extractor.get(), /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized));
// -- Find keys do not exist, but have common prefix.
std::vector<std::string> prefixes = {"001", "003", "005", "007", "009"};
std::vector<std::string> lower_bound = {keys[0], keys[1], keys[2],
keys[7], keys[9], };
// find the lower bound of the prefix
for (size_t i = 0; i < prefixes.size(); ++i) {
index_iter->Seek(InternalKey(prefixes[i], 0, kTypeValue).Encode());
ASSERT_OK(index_iter->status());
ASSERT_TRUE(index_iter->Valid());
// seek the first element in the block
ASSERT_EQ(lower_bound[i], index_iter->key().ToString());
ASSERT_EQ("v", index_iter->value().ToString());
}
// find the upper bound of prefixes
std::vector<std::string> upper_bound = {keys[1], keys[2], keys[7], keys[9], };
// find existing keys
for (const auto& item : kvmap) {
auto ukey = ExtractUserKey(item.first).ToString();
index_iter->Seek(ukey);
// ASSERT_OK(regular_iter->status());
ASSERT_OK(index_iter->status());
// ASSERT_TRUE(regular_iter->Valid());
ASSERT_TRUE(index_iter->Valid());
ASSERT_EQ(item.first, index_iter->key().ToString());
ASSERT_EQ(item.second, index_iter->value().ToString());
}
for (size_t i = 0; i < prefixes.size(); ++i) {
// the key is greater than any existing keys.
auto key = prefixes[i] + "9";
index_iter->Seek(InternalKey(key, 0, kTypeValue).Encode());
ASSERT_TRUE(index_iter->status().ok() || index_iter->status().IsNotFound());
ASSERT_TRUE(!index_iter->status().IsNotFound() || !index_iter->Valid());
if (i == prefixes.size() - 1) {
// last key
ASSERT_TRUE(!index_iter->Valid());
} else {
ASSERT_TRUE(index_iter->Valid());
// seek the first element in the block
ASSERT_EQ(upper_bound[i], index_iter->key().ToString());
ASSERT_EQ("v", index_iter->value().ToString());
}
}
// find keys with prefix that don't match any of the existing prefixes.
std::vector<std::string> non_exist_prefixes = {"002", "004", "006", "008"};
for (const auto& prefix : non_exist_prefixes) {
index_iter->Seek(InternalKey(prefix, 0, kTypeValue).Encode());
// regular_iter->Seek(prefix);
ASSERT_OK(index_iter->status());
// Seek to non-existing prefixes should yield either invalid, or a
// key with prefix greater than the target.
if (index_iter->Valid()) {
Slice ukey = ExtractUserKey(index_iter->key());
Slice ukey_prefix = options.prefix_extractor->Transform(ukey);
ASSERT_TRUE(BytewiseComparator()->Compare(prefix, ukey_prefix) < 0);
}
}
for (const auto& prefix : non_exist_prefixes) {
index_iter->SeekForPrev(InternalKey(prefix, 0, kTypeValue).Encode());
// regular_iter->Seek(prefix);
ASSERT_OK(index_iter->status());
// Seek to non-existing prefixes should yield either invalid, or a
// key with prefix greater than the target.
if (index_iter->Valid()) {
Slice ukey = ExtractUserKey(index_iter->key());
Slice ukey_prefix = options.prefix_extractor->Transform(ukey);
ASSERT_TRUE(BytewiseComparator()->Compare(prefix, ukey_prefix) > 0);
}
}
c.ResetTableReader();
}
TEST_P(BlockBasedTableTest, BinaryIndexTest) {
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.index_type = BlockBasedTableOptions::kBinarySearch;
IndexTest(table_options);
}
TEST_P(BlockBasedTableTest, HashIndexTest) {
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.index_type = BlockBasedTableOptions::kHashSearch;
IndexTest(table_options);
}
TEST_P(BlockBasedTableTest, PartitionIndexTest) {
const int max_index_keys = 5;
const int est_max_index_key_value_size = 32;
const int est_max_index_size = max_index_keys * est_max_index_key_value_size;
for (int i = 1; i <= est_max_index_size + 1; i++) {
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.index_type = BlockBasedTableOptions::kTwoLevelIndexSearch;
table_options.metadata_block_size = i;
IndexTest(table_options);
}
}
TEST_P(BlockBasedTableTest, IndexSeekOptimizationIncomplete) {
std::unique_ptr<InternalKeyComparator> comparator(
new InternalKeyComparator(BytewiseComparator()));
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
Options options;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
TableConstructor c(BytewiseComparator());
AddInternalKey(&c, "pika");
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
c.Finish(options, ioptions, moptions, table_options, *comparator, &keys,
&kvmap);
ASSERT_EQ(1, keys.size());
auto reader = c.GetTableReader();
ReadOptions ropt;
ropt.read_tier = ReadTier::kBlockCacheTier;
std::unique_ptr<InternalIterator> iter(reader->NewIterator(
ropt, /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized));
auto ikey = [](Slice user_key) {
return InternalKey(user_key, 0, kTypeValue).Encode().ToString();
};
iter->Seek(ikey("pika"));
ASSERT_FALSE(iter->Valid());
ASSERT_TRUE(iter->status().IsIncomplete());
// This used to crash at some point.
iter->Seek(ikey("pika"));
ASSERT_FALSE(iter->Valid());
ASSERT_TRUE(iter->status().IsIncomplete());
}
TEST_P(BlockBasedTableTest, BinaryIndexWithFirstKey1) {
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.index_type = BlockBasedTableOptions::kBinarySearchWithFirstKey;
IndexTest(table_options);
}
class CustomFlushBlockPolicy : public FlushBlockPolicyFactory,
public FlushBlockPolicy {
public:
explicit CustomFlushBlockPolicy(std::vector<int> keys_per_block)
: keys_per_block_(keys_per_block) {}
const char* Name() const override { return "table_test"; }
FlushBlockPolicy* NewFlushBlockPolicy(const BlockBasedTableOptions&,
const BlockBuilder&) const override {
return new CustomFlushBlockPolicy(keys_per_block_);
}
bool Update(const Slice&, const Slice&) override {
if (keys_in_current_block_ >= keys_per_block_.at(current_block_idx_)) {
++current_block_idx_;
keys_in_current_block_ = 1;
return true;
}
++keys_in_current_block_;
return false;
}
std::vector<int> keys_per_block_;
int current_block_idx_ = 0;
int keys_in_current_block_ = 0;
};
TEST_P(BlockBasedTableTest, BinaryIndexWithFirstKey2) {
for (int use_first_key = 0; use_first_key < 2; ++use_first_key) {
SCOPED_TRACE("use_first_key = " + std::to_string(use_first_key));
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.index_type =
use_first_key ? BlockBasedTableOptions::kBinarySearchWithFirstKey
: BlockBasedTableOptions::kBinarySearch;
table_options.block_cache = NewLRUCache(10000); // fits all blocks
table_options.index_shortening =
BlockBasedTableOptions::IndexShorteningMode::kNoShortening;
table_options.flush_block_policy_factory =
std::make_shared<CustomFlushBlockPolicy>(std::vector<int>{2, 1, 3, 2});
Options options;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
options.statistics = CreateDBStatistics();
Statistics* stats = options.statistics.get();
std::unique_ptr<InternalKeyComparator> comparator(
new InternalKeyComparator(BytewiseComparator()));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
TableConstructor c(BytewiseComparator());
// Block 0.
AddInternalKey(&c, "aaaa", "v0");
AddInternalKey(&c, "aaac", "v1");
// Block 1.
AddInternalKey(&c, "aaca", "v2");
// Block 2.
AddInternalKey(&c, "caaa", "v3");
AddInternalKey(&c, "caac", "v4");
AddInternalKey(&c, "caae", "v5");
// Block 3.
AddInternalKey(&c, "ccaa", "v6");
AddInternalKey(&c, "ccac", "v7");
// Write the file.
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
c.Finish(options, ioptions, moptions, table_options, *comparator, &keys,
&kvmap);
ASSERT_EQ(8, keys.size());
auto reader = c.GetTableReader();
auto props = reader->GetTableProperties();
ASSERT_EQ(4u, props->num_data_blocks);
std::unique_ptr<InternalIterator> iter(reader->NewIterator(
ReadOptions(), /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized));
// Shouldn't have read data blocks before iterator is seeked.
EXPECT_EQ(0, stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
EXPECT_EQ(0, stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
auto ikey = [](Slice user_key) {
return InternalKey(user_key, 0, kTypeValue).Encode().ToString();
};
// Seek to a key between blocks. If index contains first key, we shouldn't
// read any data blocks until value is requested.
iter->Seek(ikey("aaba"));
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[2], iter->key().ToString());
EXPECT_EQ(use_first_key ? 0 : 1,
stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
EXPECT_EQ("v2", iter->value().ToString());
EXPECT_EQ(1, stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
EXPECT_EQ(0, stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
// Seek to the middle of a block. The block should be read right away.
iter->Seek(ikey("caab"));
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[4], iter->key().ToString());
EXPECT_EQ(2, stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
EXPECT_EQ(0, stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
EXPECT_EQ("v4", iter->value().ToString());
EXPECT_EQ(0, stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
// Seek to just before the same block and don't access value.
// The iterator should keep pinning the block contents.
iter->Seek(ikey("baaa"));
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[3], iter->key().ToString());
EXPECT_EQ(0, stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
// Seek to the same block again to check that the block is still pinned.
iter->Seek(ikey("caae"));
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[5], iter->key().ToString());
EXPECT_EQ(0, stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
EXPECT_EQ("v5", iter->value().ToString());
EXPECT_EQ(2, stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
EXPECT_EQ(0, stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
// Step forward and fall through to the next block. Don't access value.
iter->Next();
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[6], iter->key().ToString());
EXPECT_EQ(use_first_key ? 2 : 3,
stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
EXPECT_EQ(0, stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
// Step forward again. Block should be read.
iter->Next();
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[7], iter->key().ToString());
EXPECT_EQ(3, stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
EXPECT_EQ("v7", iter->value().ToString());
EXPECT_EQ(0, stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
// Step forward and reach the end.
iter->Next();
EXPECT_FALSE(iter->Valid());
EXPECT_EQ(3, stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
EXPECT_EQ(0, stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
// Seek to a single-key block and step forward without accessing value.
iter->Seek(ikey("aaca"));
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[2], iter->key().ToString());
EXPECT_EQ(use_first_key ? 0 : 1,
stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
iter->Next();
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[3], iter->key().ToString());
EXPECT_EQ(use_first_key ? 1 : 2,
stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
EXPECT_EQ("v3", iter->value().ToString());
EXPECT_EQ(2, stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
EXPECT_EQ(3, stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
// Seek between blocks and step back without accessing value.
iter->Seek(ikey("aaca"));
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[2], iter->key().ToString());
EXPECT_EQ(use_first_key ? 2 : 3,
stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
EXPECT_EQ(3, stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
iter->Prev();
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[1], iter->key().ToString());
EXPECT_EQ(use_first_key ? 2 : 3,
stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
// All blocks are in cache now, there'll be no more misses ever.
EXPECT_EQ(4, stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
EXPECT_EQ("v1", iter->value().ToString());
// Next into the next block again.
iter->Next();
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[2], iter->key().ToString());
EXPECT_EQ(use_first_key ? 2 : 4,
stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
// Seek to first and step back without accessing value.
iter->SeekToFirst();
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[0], iter->key().ToString());
EXPECT_EQ(use_first_key ? 2 : 5,
stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
iter->Prev();
EXPECT_FALSE(iter->Valid());
EXPECT_EQ(use_first_key ? 2 : 5,
stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
// Do some SeekForPrev() and SeekToLast() just to cover all methods.
iter->SeekForPrev(ikey("caad"));
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[4], iter->key().ToString());
EXPECT_EQ(use_first_key ? 3 : 6,
stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
EXPECT_EQ("v4", iter->value().ToString());
EXPECT_EQ(use_first_key ? 3 : 6,
stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
iter->SeekToLast();
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(keys[7], iter->key().ToString());
EXPECT_EQ(use_first_key ? 4 : 7,
stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
EXPECT_EQ("v7", iter->value().ToString());
EXPECT_EQ(use_first_key ? 4 : 7,
stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
EXPECT_EQ(4, stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
c.ResetTableReader();
}
}
TEST_P(BlockBasedTableTest, BinaryIndexWithFirstKeyGlobalSeqno) {
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.index_type = BlockBasedTableOptions::kBinarySearchWithFirstKey;
table_options.block_cache = NewLRUCache(10000);
Options options;
options.statistics = CreateDBStatistics();
Statistics* stats = options.statistics.get();
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
std::unique_ptr<InternalKeyComparator> comparator(
new InternalKeyComparator(BytewiseComparator()));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
TableConstructor c(BytewiseComparator(), /* convert_to_internal_key */ false,
/* level */ -1, /* largest_seqno */ 42);
c.Add(InternalKey("b", 0, kTypeValue).Encode().ToString(), "x");
c.Add(InternalKey("c", 0, kTypeValue).Encode().ToString(), "y");
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
c.Finish(options, ioptions, moptions, table_options, *comparator, &keys,
&kvmap);
ASSERT_EQ(2, keys.size());
auto reader = c.GetTableReader();
auto props = reader->GetTableProperties();
ASSERT_EQ(1u, props->num_data_blocks);
std::unique_ptr<InternalIterator> iter(reader->NewIterator(
ReadOptions(), /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized));
iter->Seek(InternalKey("a", 0, kTypeValue).Encode().ToString());
ASSERT_TRUE(iter->Valid());
EXPECT_EQ(InternalKey("b", 42, kTypeValue).Encode().ToString(),
iter->key().ToString());
EXPECT_NE(keys[0], iter->key().ToString());
// Key should have been served from index, without reading data blocks.
EXPECT_EQ(0, stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
EXPECT_EQ("x", iter->value().ToString());
EXPECT_EQ(1, stats->getTickerCount(BLOCK_CACHE_DATA_MISS));
EXPECT_EQ(0, stats->getTickerCount(BLOCK_CACHE_DATA_HIT));
EXPECT_EQ(InternalKey("b", 42, kTypeValue).Encode().ToString(),
iter->key().ToString());
c.ResetTableReader();
}
// It's very hard to figure out the index block size of a block accurately.
// To make sure we get the index size, we just make sure as key number
// grows, the filter block size also grows.
TEST_P(BlockBasedTableTest, IndexSizeStat) {
uint64_t last_index_size = 0;
// we need to use random keys since the pure human readable texts
// may be well compressed, resulting insignifcant change of index
// block size.
Random rnd(test::RandomSeed());
std::vector<std::string> keys;
for (int i = 0; i < 100; ++i) {
keys.push_back(RandomString(&rnd, 10000));
}
// Each time we load one more key to the table. the table index block
// size is expected to be larger than last time's.
for (size_t i = 1; i < keys.size(); ++i) {
TableConstructor c(BytewiseComparator(),
true /* convert_to_internal_key_ */);
for (size_t j = 0; j < i; ++j) {
c.Add(keys[j], "val");
}
std::vector<std::string> ks;
stl_wrappers::KVMap kvmap;
Options options;
options.compression = kNoCompression;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.block_restart_interval = 1;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &ks, &kvmap);
auto index_size = c.GetTableReader()->GetTableProperties()->index_size;
ASSERT_GT(index_size, last_index_size);
last_index_size = index_size;
c.ResetTableReader();
}
}
TEST_P(BlockBasedTableTest, NumBlockStat) {
Random rnd(test::RandomSeed());
TableConstructor c(BytewiseComparator(), true /* convert_to_internal_key_ */);
Options options;
options.compression = kNoCompression;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.block_restart_interval = 1;
table_options.block_size = 1000;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
for (int i = 0; i < 10; ++i) {
// the key/val are slightly smaller than block size, so that each block
// holds roughly one key/value pair.
c.Add(RandomString(&rnd, 900), "val");
}
std::vector<std::string> ks;
stl_wrappers::KVMap kvmap;
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &ks, &kvmap);
ASSERT_EQ(kvmap.size(),
c.GetTableReader()->GetTableProperties()->num_data_blocks);
c.ResetTableReader();
}
TEST_P(BlockBasedTableTest, TracingGetTest) {
TableConstructor c(BytewiseComparator());
Options options;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
options.create_if_missing = true;
table_options.block_cache = NewLRUCache(1024 * 1024, 0);
table_options.cache_index_and_filter_blocks = true;
table_options.filter_policy.reset(NewBloomFilterPolicy(10, true));
options.table_factory.reset(new BlockBasedTableFactory(table_options));
SetupTracingTest(&c);
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
ImmutableCFOptions ioptions(options);
MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
std::string user_key = "k01";
InternalKey internal_key(user_key, 0, kTypeValue);
std::string encoded_key = internal_key.Encode().ToString();
for (uint32_t i = 1; i <= 2; i++) {
PinnableSlice value;
GetContext get_context(options.comparator, nullptr, nullptr, nullptr,
GetContext::kNotFound, user_key, &value, nullptr,
nullptr, true, nullptr, nullptr, nullptr, nullptr,
nullptr, nullptr, /*tracing_get_id=*/i);
get_perf_context()->Reset();
ASSERT_OK(c.GetTableReader()->Get(ReadOptions(), encoded_key, &get_context,
moptions.prefix_extractor.get()));
ASSERT_EQ(get_context.State(), GetContext::kFound);
ASSERT_EQ(value.ToString(), kDummyValue);
}
// Verify traces.
std::vector<BlockCacheTraceRecord> expected_records;
// The first two records should be prefetching index and filter blocks.
BlockCacheTraceRecord record;
record.block_type = TraceType::kBlockTraceIndexBlock;
record.caller = TableReaderCaller::kPrefetch;
record.is_cache_hit = Boolean::kFalse;
record.no_insert = Boolean::kFalse;
expected_records.push_back(record);
record.block_type = TraceType::kBlockTraceFilterBlock;
expected_records.push_back(record);
// Then we should have three records for one index, one filter, and one data
// block access.
record.get_id = 1;
record.block_type = TraceType::kBlockTraceIndexBlock;
record.caller = TableReaderCaller::kUserGet;
record.get_from_user_specified_snapshot = Boolean::kFalse;
record.referenced_key = encoded_key;
record.referenced_key_exist_in_block = Boolean::kTrue;
record.is_cache_hit = Boolean::kTrue;
expected_records.push_back(record);
record.block_type = TraceType::kBlockTraceFilterBlock;
expected_records.push_back(record);
record.is_cache_hit = Boolean::kFalse;
record.block_type = TraceType::kBlockTraceDataBlock;
expected_records.push_back(record);
// The second get should all observe cache hits.
record.is_cache_hit = Boolean::kTrue;
record.get_id = 2;
record.block_type = TraceType::kBlockTraceIndexBlock;
record.caller = TableReaderCaller::kUserGet;
record.get_from_user_specified_snapshot = Boolean::kFalse;
record.referenced_key = encoded_key;
expected_records.push_back(record);
record.block_type = TraceType::kBlockTraceFilterBlock;
expected_records.push_back(record);
record.block_type = TraceType::kBlockTraceDataBlock;
expected_records.push_back(record);
VerifyBlockAccessTrace(&c, expected_records);
c.ResetTableReader();
}
TEST_P(BlockBasedTableTest, TracingApproximateOffsetOfTest) {
TableConstructor c(BytewiseComparator());
Options options;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
options.create_if_missing = true;
table_options.block_cache = NewLRUCache(1024 * 1024, 0);
table_options.cache_index_and_filter_blocks = true;
table_options.filter_policy.reset(NewBloomFilterPolicy(10, true));
options.table_factory.reset(new BlockBasedTableFactory(table_options));
SetupTracingTest(&c);
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
ImmutableCFOptions ioptions(options);
MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
for (uint32_t i = 1; i <= 2; i++) {
std::string user_key = "k01";
InternalKey internal_key(user_key, 0, kTypeValue);
std::string encoded_key = internal_key.Encode().ToString();
c.GetTableReader()->ApproximateOffsetOf(
encoded_key, TableReaderCaller::kUserApproximateSize);
}
// Verify traces.
std::vector<BlockCacheTraceRecord> expected_records;
// The first two records should be prefetching index and filter blocks.
BlockCacheTraceRecord record;
record.block_type = TraceType::kBlockTraceIndexBlock;
record.caller = TableReaderCaller::kPrefetch;
record.is_cache_hit = Boolean::kFalse;
record.no_insert = Boolean::kFalse;
expected_records.push_back(record);
record.block_type = TraceType::kBlockTraceFilterBlock;
expected_records.push_back(record);
// Then we should have two records for only index blocks.
record.block_type = TraceType::kBlockTraceIndexBlock;
record.caller = TableReaderCaller::kUserApproximateSize;
record.is_cache_hit = Boolean::kTrue;
expected_records.push_back(record);
expected_records.push_back(record);
VerifyBlockAccessTrace(&c, expected_records);
c.ResetTableReader();
}
TEST_P(BlockBasedTableTest, TracingIterator) {
TableConstructor c(BytewiseComparator());
Options options;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
options.create_if_missing = true;
table_options.block_cache = NewLRUCache(1024 * 1024, 0);
table_options.cache_index_and_filter_blocks = true;
table_options.filter_policy.reset(NewBloomFilterPolicy(10, true));
options.table_factory.reset(new BlockBasedTableFactory(table_options));
SetupTracingTest(&c);
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
ImmutableCFOptions ioptions(options);
MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
for (uint32_t i = 1; i <= 2; i++) {
std::unique_ptr<InternalIterator> iter(c.GetTableReader()->NewIterator(
ReadOptions(), moptions.prefix_extractor.get(), /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUserIterator));
iter->SeekToFirst();
while (iter->Valid()) {
iter->key();
iter->value();
iter->Next();
}
ASSERT_OK(iter->status());
iter.reset();
}
// Verify traces.
std::vector<BlockCacheTraceRecord> expected_records;
// The first two records should be prefetching index and filter blocks.
BlockCacheTraceRecord record;
record.block_type = TraceType::kBlockTraceIndexBlock;
record.caller = TableReaderCaller::kPrefetch;
record.is_cache_hit = Boolean::kFalse;
record.no_insert = Boolean::kFalse;
expected_records.push_back(record);
record.block_type = TraceType::kBlockTraceFilterBlock;
expected_records.push_back(record);
// Then we should have three records for index and two data block access.
record.block_type = TraceType::kBlockTraceIndexBlock;
record.caller = TableReaderCaller::kUserIterator;
record.is_cache_hit = Boolean::kTrue;
expected_records.push_back(record);
record.block_type = TraceType::kBlockTraceDataBlock;
record.is_cache_hit = Boolean::kFalse;
expected_records.push_back(record);
expected_records.push_back(record);
// When we iterate this file for the second time, we should observe all cache
// hits.
record.block_type = TraceType::kBlockTraceIndexBlock;
record.is_cache_hit = Boolean::kTrue;
expected_records.push_back(record);
record.block_type = TraceType::kBlockTraceDataBlock;
expected_records.push_back(record);
expected_records.push_back(record);
VerifyBlockAccessTrace(&c, expected_records);
c.ResetTableReader();
}
// A simple tool that takes the snapshot of block cache statistics.
class BlockCachePropertiesSnapshot {
public:
explicit BlockCachePropertiesSnapshot(Statistics* statistics) {
block_cache_miss = statistics->getTickerCount(BLOCK_CACHE_MISS);
block_cache_hit = statistics->getTickerCount(BLOCK_CACHE_HIT);
index_block_cache_miss = statistics->getTickerCount(BLOCK_CACHE_INDEX_MISS);
index_block_cache_hit = statistics->getTickerCount(BLOCK_CACHE_INDEX_HIT);
data_block_cache_miss = statistics->getTickerCount(BLOCK_CACHE_DATA_MISS);
data_block_cache_hit = statistics->getTickerCount(BLOCK_CACHE_DATA_HIT);
filter_block_cache_miss =
statistics->getTickerCount(BLOCK_CACHE_FILTER_MISS);
filter_block_cache_hit = statistics->getTickerCount(BLOCK_CACHE_FILTER_HIT);
block_cache_bytes_read = statistics->getTickerCount(BLOCK_CACHE_BYTES_READ);
block_cache_bytes_write =
statistics->getTickerCount(BLOCK_CACHE_BYTES_WRITE);
}
void AssertIndexBlockStat(int64_t expected_index_block_cache_miss,
int64_t expected_index_block_cache_hit) {
ASSERT_EQ(expected_index_block_cache_miss, index_block_cache_miss);
ASSERT_EQ(expected_index_block_cache_hit, index_block_cache_hit);
}
void AssertFilterBlockStat(int64_t expected_filter_block_cache_miss,
int64_t expected_filter_block_cache_hit) {
ASSERT_EQ(expected_filter_block_cache_miss, filter_block_cache_miss);
ASSERT_EQ(expected_filter_block_cache_hit, filter_block_cache_hit);
}
// Check if the fetched props matches the expected ones.
// TODO(kailiu) Use this only when you disabled filter policy!
void AssertEqual(int64_t expected_index_block_cache_miss,
int64_t expected_index_block_cache_hit,
int64_t expected_data_block_cache_miss,
int64_t expected_data_block_cache_hit) const {
ASSERT_EQ(expected_index_block_cache_miss, index_block_cache_miss);
ASSERT_EQ(expected_index_block_cache_hit, index_block_cache_hit);
ASSERT_EQ(expected_data_block_cache_miss, data_block_cache_miss);
ASSERT_EQ(expected_data_block_cache_hit, data_block_cache_hit);
ASSERT_EQ(expected_index_block_cache_miss + expected_data_block_cache_miss,
block_cache_miss);
ASSERT_EQ(expected_index_block_cache_hit + expected_data_block_cache_hit,
block_cache_hit);
}
int64_t GetCacheBytesRead() { return block_cache_bytes_read; }
int64_t GetCacheBytesWrite() { return block_cache_bytes_write; }
private:
int64_t block_cache_miss = 0;
int64_t block_cache_hit = 0;
int64_t index_block_cache_miss = 0;
int64_t index_block_cache_hit = 0;
int64_t data_block_cache_miss = 0;
int64_t data_block_cache_hit = 0;
int64_t filter_block_cache_miss = 0;
int64_t filter_block_cache_hit = 0;
int64_t block_cache_bytes_read = 0;
int64_t block_cache_bytes_write = 0;
};
// Make sure, by default, index/filter blocks were pre-loaded (meaning we won't
// use block cache to store them).
TEST_P(BlockBasedTableTest, BlockCacheDisabledTest) {
Options options;
options.create_if_missing = true;
options.statistics = CreateDBStatistics();
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.block_cache = NewLRUCache(1024, 4);
table_options.filter_policy.reset(NewBloomFilterPolicy(10));
options.table_factory.reset(new BlockBasedTableFactory(table_options));
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
TableConstructor c(BytewiseComparator(), true /* convert_to_internal_key_ */);
c.Add("key", "value");
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
// preloading filter/index blocks is enabled.
auto reader = dynamic_cast<BlockBasedTable*>(c.GetTableReader());
ASSERT_FALSE(reader->TEST_FilterBlockInCache());
ASSERT_FALSE(reader->TEST_IndexBlockInCache());
{
// nothing happens in the beginning
BlockCachePropertiesSnapshot props(options.statistics.get());
props.AssertIndexBlockStat(0, 0);
props.AssertFilterBlockStat(0, 0);
}
{
GetContext get_context(options.comparator, nullptr, nullptr, nullptr,
GetContext::kNotFound, Slice(), nullptr, nullptr,
nullptr, true, nullptr, nullptr);
// a hack that just to trigger BlockBasedTable::GetFilter.
reader->Get(ReadOptions(), "non-exist-key", &get_context,
moptions.prefix_extractor.get());
BlockCachePropertiesSnapshot props(options.statistics.get());
props.AssertIndexBlockStat(0, 0);
props.AssertFilterBlockStat(0, 0);
}
}
// Due to the difficulities of the intersaction between statistics, this test
// only tests the case when "index block is put to block cache"
TEST_P(BlockBasedTableTest, FilterBlockInBlockCache) {
// -- Table construction
Options options;
options.create_if_missing = true;
options.statistics = CreateDBStatistics();
// Enable the cache for index/filter blocks
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
LRUCacheOptions co;
co.capacity = 2048;
co.num_shard_bits = 2;
co.metadata_charge_policy = kDontChargeCacheMetadata;
table_options.block_cache = NewLRUCache(co);
table_options.cache_index_and_filter_blocks = true;
options.table_factory.reset(new BlockBasedTableFactory(table_options));
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
TableConstructor c(BytewiseComparator(), true /* convert_to_internal_key_ */);
c.Add("key", "value");
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
// preloading filter/index blocks is prohibited.
auto* reader = dynamic_cast<BlockBasedTable*>(c.GetTableReader());
ASSERT_FALSE(reader->TEST_FilterBlockInCache());
ASSERT_TRUE(reader->TEST_IndexBlockInCache());
// -- PART 1: Open with regular block cache.
// Since block_cache is disabled, no cache activities will be involved.
std::unique_ptr<InternalIterator> iter;
int64_t last_cache_bytes_read = 0;
// At first, no block will be accessed.
{
BlockCachePropertiesSnapshot props(options.statistics.get());
// index will be added to block cache.
props.AssertEqual(1, // index block miss
0, 0, 0);
ASSERT_EQ(props.GetCacheBytesRead(), 0);
ASSERT_EQ(props.GetCacheBytesWrite(),
static_cast<int64_t>(table_options.block_cache->GetUsage()));
last_cache_bytes_read = props.GetCacheBytesRead();
}
// Only index block will be accessed
{
iter.reset(c.NewIterator(moptions.prefix_extractor.get()));
BlockCachePropertiesSnapshot props(options.statistics.get());
// NOTE: to help better highlight the "detla" of each ticker, I use
// <last_value> + <added_value> to indicate the increment of changed
// value; other numbers remain the same.
props.AssertEqual(1, 0 + 1, // index block hit
0, 0);
// Cache hit, bytes read from cache should increase
ASSERT_GT(props.GetCacheBytesRead(), last_cache_bytes_read);
ASSERT_EQ(props.GetCacheBytesWrite(),
static_cast<int64_t>(table_options.block_cache->GetUsage()));
last_cache_bytes_read = props.GetCacheBytesRead();
}
// Only data block will be accessed
{
iter->SeekToFirst();
BlockCachePropertiesSnapshot props(options.statistics.get());
props.AssertEqual(1, 1, 0 + 1, // data block miss
0);
// Cache miss, Bytes read from cache should not change
ASSERT_EQ(props.GetCacheBytesRead(), last_cache_bytes_read);
ASSERT_EQ(props.GetCacheBytesWrite(),
static_cast<int64_t>(table_options.block_cache->GetUsage()));
last_cache_bytes_read = props.GetCacheBytesRead();
}
// Data block will be in cache
{
iter.reset(c.NewIterator(moptions.prefix_extractor.get()));
iter->SeekToFirst();
BlockCachePropertiesSnapshot props(options.statistics.get());
props.AssertEqual(1, 1 + 1, /* index block hit */
1, 0 + 1 /* data block hit */);
// Cache hit, bytes read from cache should increase
ASSERT_GT(props.GetCacheBytesRead(), last_cache_bytes_read);
ASSERT_EQ(props.GetCacheBytesWrite(),
static_cast<int64_t>(table_options.block_cache->GetUsage()));
}
// release the iterator so that the block cache can reset correctly.
iter.reset();
c.ResetTableReader();
// -- PART 2: Open with very small block cache
// In this test, no block will ever get hit since the block cache is
// too small to fit even one entry.
table_options.block_cache = NewLRUCache(1, 4);
options.statistics = CreateDBStatistics();
options.table_factory.reset(new BlockBasedTableFactory(table_options));
const ImmutableCFOptions ioptions2(options);
const MutableCFOptions moptions2(options);
c.Reopen(ioptions2, moptions2);
{
BlockCachePropertiesSnapshot props(options.statistics.get());
props.AssertEqual(1, // index block miss
0, 0, 0);
// Cache miss, Bytes read from cache should not change
ASSERT_EQ(props.GetCacheBytesRead(), 0);
}
{
// Both index and data block get accessed.
// It first cache index block then data block. But since the cache size
// is only 1, index block will be purged after data block is inserted.
iter.reset(c.NewIterator(moptions2.prefix_extractor.get()));
BlockCachePropertiesSnapshot props(options.statistics.get());
props.AssertEqual(1 + 1, // index block miss
0, 0, // data block miss
0);
// Cache hit, bytes read from cache should increase
ASSERT_EQ(props.GetCacheBytesRead(), 0);
}
{
// SeekToFirst() accesses data block. With similar reason, we expect data
// block's cache miss.
iter->SeekToFirst();
BlockCachePropertiesSnapshot props(options.statistics.get());
props.AssertEqual(2, 0, 0 + 1, // data block miss
0);
// Cache miss, Bytes read from cache should not change
ASSERT_EQ(props.GetCacheBytesRead(), 0);
}
iter.reset();
c.ResetTableReader();
// -- PART 3: Open table with bloom filter enabled but not in SST file
table_options.block_cache = NewLRUCache(4096, 4);
table_options.cache_index_and_filter_blocks = false;
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
TableConstructor c3(BytewiseComparator());
std::string user_key = "k01";
InternalKey internal_key(user_key, 0, kTypeValue);
c3.Add(internal_key.Encode().ToString(), "hello");
ImmutableCFOptions ioptions3(options);
MutableCFOptions moptions3(options);
// Generate table without filter policy
c3.Finish(options, ioptions3, moptions3, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
c3.ResetTableReader();
// Open table with filter policy
table_options.filter_policy.reset(NewBloomFilterPolicy(1));
options.table_factory.reset(new BlockBasedTableFactory(table_options));
options.statistics = CreateDBStatistics();
ImmutableCFOptions ioptions4(options);
MutableCFOptions moptions4(options);
ASSERT_OK(c3.Reopen(ioptions4, moptions4));
reader = dynamic_cast<BlockBasedTable*>(c3.GetTableReader());
ASSERT_FALSE(reader->TEST_FilterBlockInCache());
PinnableSlice value;
GetContext get_context(options.comparator, nullptr, nullptr, nullptr,
GetContext::kNotFound, user_key, &value, nullptr,
nullptr, true, nullptr, nullptr);
ASSERT_OK(reader->Get(ReadOptions(), internal_key.Encode(), &get_context,
moptions4.prefix_extractor.get()));
ASSERT_STREQ(value.data(), "hello");
BlockCachePropertiesSnapshot props(options.statistics.get());
props.AssertFilterBlockStat(0, 0);
c3.ResetTableReader();
}
void ValidateBlockSizeDeviation(int value, int expected) {
BlockBasedTableOptions table_options;
table_options.block_size_deviation = value;
BlockBasedTableFactory* factory = new BlockBasedTableFactory(table_options);
const BlockBasedTableOptions* normalized_table_options =
(const BlockBasedTableOptions*)factory->GetOptions();
ASSERT_EQ(normalized_table_options->block_size_deviation, expected);
delete factory;
}
void ValidateBlockRestartInterval(int value, int expected) {
BlockBasedTableOptions table_options;
table_options.block_restart_interval = value;
BlockBasedTableFactory* factory = new BlockBasedTableFactory(table_options);
const BlockBasedTableOptions* normalized_table_options =
(const BlockBasedTableOptions*)factory->GetOptions();
ASSERT_EQ(normalized_table_options->block_restart_interval, expected);
delete factory;
}
TEST_P(BlockBasedTableTest, InvalidOptions) {
// invalid values for block_size_deviation (<0 or >100) are silently set to 0
ValidateBlockSizeDeviation(-10, 0);
ValidateBlockSizeDeviation(-1, 0);
ValidateBlockSizeDeviation(0, 0);
ValidateBlockSizeDeviation(1, 1);
ValidateBlockSizeDeviation(99, 99);
ValidateBlockSizeDeviation(100, 100);
ValidateBlockSizeDeviation(101, 0);
ValidateBlockSizeDeviation(1000, 0);
// invalid values for block_restart_interval (<1) are silently set to 1
ValidateBlockRestartInterval(-10, 1);
ValidateBlockRestartInterval(-1, 1);
ValidateBlockRestartInterval(0, 1);
ValidateBlockRestartInterval(1, 1);
ValidateBlockRestartInterval(2, 2);
ValidateBlockRestartInterval(1000, 1000);
}
TEST_P(BlockBasedTableTest, BlockReadCountTest) {
// bloom_filter_type = 0 -- block-based filter
// bloom_filter_type = 0 -- full filter
for (int bloom_filter_type = 0; bloom_filter_type < 2; ++bloom_filter_type) {
for (int index_and_filter_in_cache = 0; index_and_filter_in_cache < 2;
++index_and_filter_in_cache) {
Options options;
options.create_if_missing = true;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.block_cache = NewLRUCache(1, 0);
table_options.cache_index_and_filter_blocks = index_and_filter_in_cache;
table_options.filter_policy.reset(
NewBloomFilterPolicy(10, bloom_filter_type == 0));
options.table_factory.reset(new BlockBasedTableFactory(table_options));
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
TableConstructor c(BytewiseComparator());
std::string user_key = "k04";
InternalKey internal_key(user_key, 0, kTypeValue);
std::string encoded_key = internal_key.Encode().ToString();
c.Add(encoded_key, "hello");
ImmutableCFOptions ioptions(options);
MutableCFOptions moptions(options);
// Generate table with filter policy
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
auto reader = c.GetTableReader();
PinnableSlice value;
{
GetContext get_context(options.comparator, nullptr, nullptr, nullptr,
GetContext::kNotFound, user_key, &value, nullptr,
nullptr, true, nullptr, nullptr);
get_perf_context()->Reset();
ASSERT_OK(reader->Get(ReadOptions(), encoded_key, &get_context,
moptions.prefix_extractor.get()));
if (index_and_filter_in_cache) {
// data, index and filter block
ASSERT_EQ(get_perf_context()->block_read_count, 3);
ASSERT_EQ(get_perf_context()->index_block_read_count, 1);
ASSERT_EQ(get_perf_context()->filter_block_read_count, 1);
} else {
// just the data block
ASSERT_EQ(get_perf_context()->block_read_count, 1);
}
ASSERT_EQ(get_context.State(), GetContext::kFound);
ASSERT_STREQ(value.data(), "hello");
}
// Get non-existing key
user_key = "does-not-exist";
internal_key = InternalKey(user_key, 0, kTypeValue);
encoded_key = internal_key.Encode().ToString();
value.Reset();
{
GetContext get_context(options.comparator, nullptr, nullptr, nullptr,
GetContext::kNotFound, user_key, &value, nullptr,
nullptr, true, nullptr, nullptr);
get_perf_context()->Reset();
ASSERT_OK(reader->Get(ReadOptions(), encoded_key, &get_context,
moptions.prefix_extractor.get()));
ASSERT_EQ(get_context.State(), GetContext::kNotFound);
}
if (index_and_filter_in_cache) {
if (bloom_filter_type == 0) {
// with block-based, we read index and then the filter
ASSERT_EQ(get_perf_context()->block_read_count, 2);
ASSERT_EQ(get_perf_context()->index_block_read_count, 1);
ASSERT_EQ(get_perf_context()->filter_block_read_count, 1);
} else {
// with full-filter, we read filter first and then we stop
ASSERT_EQ(get_perf_context()->block_read_count, 1);
ASSERT_EQ(get_perf_context()->filter_block_read_count, 1);
}
} else {
// filter is already in memory and it figures out that the key doesn't
// exist
ASSERT_EQ(get_perf_context()->block_read_count, 0);
}
}
}
}
TEST_P(BlockBasedTableTest, BlockCacheLeak) {
// Check that when we reopen a table we don't lose access to blocks already
// in the cache. This test checks whether the Table actually makes use of the
// unique ID from the file.
Options opt;
std::unique_ptr<InternalKeyComparator> ikc;
ikc.reset(new test::PlainInternalKeyComparator(opt.comparator));
opt.compression = kNoCompression;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.block_size = 1024;
// big enough so we don't ever lose cached values.
table_options.block_cache = NewLRUCache(16 * 1024 * 1024, 4);
opt.table_factory.reset(NewBlockBasedTableFactory(table_options));
TableConstructor c(BytewiseComparator(), true /* convert_to_internal_key_ */);
c.Add("k01", "hello");
c.Add("k02", "hello2");
c.Add("k03", std::string(10000, 'x'));
c.Add("k04", std::string(200000, 'x'));
c.Add("k05", std::string(300000, 'x'));
c.Add("k06", "hello3");
c.Add("k07", std::string(100000, 'x'));
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
const ImmutableCFOptions ioptions(opt);
const MutableCFOptions moptions(opt);
c.Finish(opt, ioptions, moptions, table_options, *ikc, &keys, &kvmap);
std::unique_ptr<InternalIterator> iter(
c.NewIterator(moptions.prefix_extractor.get()));
iter->SeekToFirst();
while (iter->Valid()) {
iter->key();
iter->value();
iter->Next();
}
ASSERT_OK(iter->status());
iter.reset();
const ImmutableCFOptions ioptions1(opt);
const MutableCFOptions moptions1(opt);
ASSERT_OK(c.Reopen(ioptions1, moptions1));
auto table_reader = dynamic_cast<BlockBasedTable*>(c.GetTableReader());
for (const std::string& key : keys) {
InternalKey ikey(key, kMaxSequenceNumber, kTypeValue);
ASSERT_TRUE(table_reader->TEST_KeyInCache(ReadOptions(), ikey.Encode()));
}
c.ResetTableReader();
// rerun with different block cache
table_options.block_cache = NewLRUCache(16 * 1024 * 1024, 4);
opt.table_factory.reset(NewBlockBasedTableFactory(table_options));
const ImmutableCFOptions ioptions2(opt);
const MutableCFOptions moptions2(opt);
ASSERT_OK(c.Reopen(ioptions2, moptions2));
table_reader = dynamic_cast<BlockBasedTable*>(c.GetTableReader());
for (const std::string& key : keys) {
InternalKey ikey(key, kMaxSequenceNumber, kTypeValue);
ASSERT_TRUE(!table_reader->TEST_KeyInCache(ReadOptions(), ikey.Encode()));
}
c.ResetTableReader();
}
namespace {
class CustomMemoryAllocator : public MemoryAllocator {
public:
const char* Name() const override { return "CustomMemoryAllocator"; }
void* Allocate(size_t size) override {
++numAllocations;
auto ptr = new char[size + 16];
memcpy(ptr, "memory_allocator_", 16); // mangle first 16 bytes
return reinterpret_cast<void*>(ptr + 16);
}
void Deallocate(void* p) override {
++numDeallocations;
char* ptr = reinterpret_cast<char*>(p) - 16;
delete[] ptr;
}
std::atomic<int> numAllocations;
std::atomic<int> numDeallocations;
};
} // namespace
TEST_P(BlockBasedTableTest, MemoryAllocator) {
auto custom_memory_allocator = std::make_shared<CustomMemoryAllocator>();
{
Options opt;
std::unique_ptr<InternalKeyComparator> ikc;
ikc.reset(new test::PlainInternalKeyComparator(opt.comparator));
opt.compression = kNoCompression;
BlockBasedTableOptions table_options;
table_options.block_size = 1024;
LRUCacheOptions lruOptions;
lruOptions.memory_allocator = custom_memory_allocator;
lruOptions.capacity = 16 * 1024 * 1024;
lruOptions.num_shard_bits = 4;
table_options.block_cache = NewLRUCache(std::move(lruOptions));
opt.table_factory.reset(NewBlockBasedTableFactory(table_options));
TableConstructor c(BytewiseComparator(),
true /* convert_to_internal_key_ */);
c.Add("k01", "hello");
c.Add("k02", "hello2");
c.Add("k03", std::string(10000, 'x'));
c.Add("k04", std::string(200000, 'x'));
c.Add("k05", std::string(300000, 'x'));
c.Add("k06", "hello3");
c.Add("k07", std::string(100000, 'x'));
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
const ImmutableCFOptions ioptions(opt);
const MutableCFOptions moptions(opt);
c.Finish(opt, ioptions, moptions, table_options, *ikc, &keys, &kvmap);
std::unique_ptr<InternalIterator> iter(
c.NewIterator(moptions.prefix_extractor.get()));
iter->SeekToFirst();
while (iter->Valid()) {
iter->key();
iter->value();
iter->Next();
}
ASSERT_OK(iter->status());
}
// out of scope, block cache should have been deleted, all allocations
// deallocated
EXPECT_EQ(custom_memory_allocator->numAllocations.load(),
custom_memory_allocator->numDeallocations.load());
// make sure that allocations actually happened through the cache allocator
EXPECT_GT(custom_memory_allocator->numAllocations.load(), 0);
}
// Plain table is not supported in ROCKSDB_LITE
#ifndef ROCKSDB_LITE
TEST_F(PlainTableTest, BasicPlainTableProperties) {
PlainTableOptions plain_table_options;
plain_table_options.user_key_len = 8;
plain_table_options.bloom_bits_per_key = 8;
plain_table_options.hash_table_ratio = 0;
PlainTableFactory factory(plain_table_options);
test::StringSink sink;
std::unique_ptr<WritableFileWriter> file_writer(
test::GetWritableFileWriter(new test::StringSink(), "" /* don't care */));
Options options;
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
InternalKeyComparator ikc(options.comparator);
std::vector<std::unique_ptr<IntTblPropCollectorFactory>>
int_tbl_prop_collector_factories;
std::string column_family_name;
int unknown_level = -1;
std::unique_ptr<TableBuilder> builder(factory.NewTableBuilder(
TableBuilderOptions(
ioptions, moptions, ikc, &int_tbl_prop_collector_factories,
kNoCompression, 0 /* sample_for_compression */, CompressionOptions(),
false /* skip_filters */, column_family_name, unknown_level),
TablePropertiesCollectorFactory::Context::kUnknownColumnFamily,
file_writer.get()));
for (char c = 'a'; c <= 'z'; ++c) {
std::string key(8, c);
key.append("\1 "); // PlainTable expects internal key structure
std::string value(28, c + 42);
builder->Add(key, value);
}
ASSERT_OK(builder->Finish());
file_writer->Flush();
test::StringSink* ss =
rocksdb::test::GetStringSinkFromLegacyWriter(file_writer.get());
std::unique_ptr<RandomAccessFileReader> file_reader(
test::GetRandomAccessFileReader(
new test::StringSource(ss->contents(), 72242, true)));
TableProperties* props = nullptr;
auto s = ReadTableProperties(file_reader.get(), ss->contents().size(),
kPlainTableMagicNumber, ioptions,
&props, true /* compression_type_missing */);
std::unique_ptr<TableProperties> props_guard(props);
ASSERT_OK(s);
ASSERT_EQ(0ul, props->index_size);
ASSERT_EQ(0ul, props->filter_size);
ASSERT_EQ(16ul * 26, props->raw_key_size);
ASSERT_EQ(28ul * 26, props->raw_value_size);
ASSERT_EQ(26ul, props->num_entries);
ASSERT_EQ(1ul, props->num_data_blocks);
}
#endif // !ROCKSDB_LITE
TEST_F(GeneralTableTest, ApproximateOffsetOfPlain) {
TableConstructor c(BytewiseComparator(), true /* convert_to_internal_key_ */);
c.Add("k01", "hello");
c.Add("k02", "hello2");
c.Add("k03", std::string(10000, 'x'));
c.Add("k04", std::string(200000, 'x'));
c.Add("k05", std::string(300000, 'x'));
c.Add("k06", "hello3");
c.Add("k07", std::string(100000, 'x'));
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
Options options;
test::PlainInternalKeyComparator internal_comparator(options.comparator);
options.compression = kNoCompression;
BlockBasedTableOptions table_options;
table_options.block_size = 1024;
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options, internal_comparator,
&keys, &kvmap);
ASSERT_TRUE(Between(c.ApproximateOffsetOf("abc"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01a"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k02"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k03"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04"), 10000, 11000));
// k04 and k05 will be in two consecutive blocks, the index is
// an arbitrary slice between k04 and k05, either before or after k04a
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04a"), 10000, 211000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k05"), 210000, 211000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k06"), 510000, 511000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k07"), 510000, 511000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("xyz"), 610000, 612000));
c.ResetTableReader();
}
static void DoCompressionTest(CompressionType comp) {
Random rnd(301);
TableConstructor c(BytewiseComparator(), true /* convert_to_internal_key_ */);
std::string tmp;
c.Add("k01", "hello");
c.Add("k02", test::CompressibleString(&rnd, 0.25, 10000, &tmp));
c.Add("k03", "hello3");
c.Add("k04", test::CompressibleString(&rnd, 0.25, 10000, &tmp));
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
Options options;
test::PlainInternalKeyComparator ikc(options.comparator);
options.compression = comp;
BlockBasedTableOptions table_options;
table_options.block_size = 1024;
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options, ikc, &keys, &kvmap);
ASSERT_TRUE(Between(c.ApproximateOffsetOf("abc"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k02"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k03"), 2000, 3500));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04"), 2000, 3500));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("xyz"), 4000, 6500));
c.ResetTableReader();
}
TEST_F(GeneralTableTest, ApproximateOffsetOfCompressed) {
std::vector<CompressionType> compression_state;
if (!Snappy_Supported()) {
fprintf(stderr, "skipping snappy compression tests\n");
} else {
compression_state.push_back(kSnappyCompression);
}
if (!Zlib_Supported()) {
fprintf(stderr, "skipping zlib compression tests\n");
} else {
compression_state.push_back(kZlibCompression);
}
// TODO(kailiu) DoCompressionTest() doesn't work with BZip2.
/*
if (!BZip2_Supported()) {
fprintf(stderr, "skipping bzip2 compression tests\n");
} else {
compression_state.push_back(kBZip2Compression);
}
*/
if (!LZ4_Supported()) {
fprintf(stderr, "skipping lz4 and lz4hc compression tests\n");
} else {
compression_state.push_back(kLZ4Compression);
compression_state.push_back(kLZ4HCCompression);
}
if (!XPRESS_Supported()) {
fprintf(stderr, "skipping xpress and xpress compression tests\n");
}
else {
compression_state.push_back(kXpressCompression);
}
for (auto state : compression_state) {
DoCompressionTest(state);
}
}
#ifndef ROCKSDB_VALGRIND_RUN
// RandomizedHarnessTest is very slow for certain combination of arguments
// Split into 8 pieces to reduce the time individual tests take.
TEST_F(HarnessTest, Randomized1) {
// part 1 out of 8
const size_t part = 1;
const size_t total = 8;
RandomizedHarnessTest(part, total);
}
TEST_F(HarnessTest, Randomized2) {
// part 2 out of 8
const size_t part = 2;
const size_t total = 8;
RandomizedHarnessTest(part, total);
}
TEST_F(HarnessTest, Randomized3) {
// part 3 out of 8
const size_t part = 3;
const size_t total = 8;
RandomizedHarnessTest(part, total);
}
TEST_F(HarnessTest, Randomized4) {
// part 4 out of 8
const size_t part = 4;
const size_t total = 8;
RandomizedHarnessTest(part, total);
}
TEST_F(HarnessTest, Randomized5) {
// part 5 out of 8
const size_t part = 5;
const size_t total = 8;
RandomizedHarnessTest(part, total);
}
TEST_F(HarnessTest, Randomized6) {
// part 6 out of 8
const size_t part = 6;
const size_t total = 8;
RandomizedHarnessTest(part, total);
}
TEST_F(HarnessTest, Randomized7) {
// part 7 out of 8
const size_t part = 7;
const size_t total = 8;
RandomizedHarnessTest(part, total);
}
TEST_F(HarnessTest, Randomized8) {
// part 8 out of 8
const size_t part = 8;
const size_t total = 8;
RandomizedHarnessTest(part, total);
}
#ifndef ROCKSDB_LITE
TEST_F(HarnessTest, RandomizedLongDB) {
Random rnd(test::RandomSeed());
TestArgs args = {DB_TEST, false, 16, kNoCompression, 0, false};
Init(args);
int num_entries = 100000;
for (int e = 0; e < num_entries; e++) {
std::string v;
Add(test::RandomKey(&rnd, rnd.Skewed(4)),
test::RandomString(&rnd, rnd.Skewed(5), &v).ToString());
}
Test(&rnd);
// We must have created enough data to force merging
int files = 0;
for (int level = 0; level < db()->NumberLevels(); level++) {
std::string value;
char name[100];
snprintf(name, sizeof(name), "rocksdb.num-files-at-level%d", level);
ASSERT_TRUE(db()->GetProperty(name, &value));
files += atoi(value.c_str());
}
ASSERT_GT(files, 0);
}
#endif // ROCKSDB_LITE
#endif // ROCKSDB_VALGRIND_RUN
class MemTableTest : public testing::Test {};
TEST_F(MemTableTest, Simple) {
InternalKeyComparator cmp(BytewiseComparator());
auto table_factory = std::make_shared<SkipListFactory>();
Options options;
options.memtable_factory = table_factory;
ImmutableCFOptions ioptions(options);
WriteBufferManager wb(options.db_write_buffer_size);
MemTable* memtable =
new MemTable(cmp, ioptions, MutableCFOptions(options), &wb,
kMaxSequenceNumber, 0 /* column_family_id */);
memtable->Ref();
WriteBatch batch;
WriteBatchInternal::SetSequence(&batch, 100);
batch.Put(std::string("k1"), std::string("v1"));
batch.Put(std::string("k2"), std::string("v2"));
batch.Put(std::string("k3"), std::string("v3"));
batch.Put(std::string("largekey"), std::string("vlarge"));
batch.DeleteRange(std::string("chi"), std::string("xigua"));
batch.DeleteRange(std::string("begin"), std::string("end"));
ColumnFamilyMemTablesDefault cf_mems_default(memtable);
ASSERT_TRUE(
WriteBatchInternal::InsertInto(&batch, &cf_mems_default, nullptr, nullptr)
.ok());
for (int i = 0; i < 2; ++i) {
Arena arena;
ScopedArenaIterator arena_iter_guard;
std::unique_ptr<InternalIterator> iter_guard;
InternalIterator* iter;
if (i == 0) {
iter = memtable->NewIterator(ReadOptions(), &arena);
arena_iter_guard.set(iter);
} else {
iter = memtable->NewRangeTombstoneIterator(
ReadOptions(), kMaxSequenceNumber /* read_seq */);
iter_guard.reset(iter);
}
if (iter == nullptr) {
continue;
}
iter->SeekToFirst();
while (iter->Valid()) {
fprintf(stderr, "key: '%s' -> '%s'\n", iter->key().ToString().c_str(),
iter->value().ToString().c_str());
iter->Next();
}
}
delete memtable->Unref();
}
// Test the empty key
TEST_F(HarnessTest, SimpleEmptyKey) {
auto args = GenerateArgList();
for (const auto& arg : args) {
Init(arg);
Random rnd(test::RandomSeed() + 1);
Add("", "v");
Test(&rnd);
}
}
TEST_F(HarnessTest, SimpleSingle) {
auto args = GenerateArgList();
for (const auto& arg : args) {
Init(arg);
Random rnd(test::RandomSeed() + 2);
Add("abc", "v");
Test(&rnd);
}
}
TEST_F(HarnessTest, SimpleMulti) {
auto args = GenerateArgList();
for (const auto& arg : args) {
Init(arg);
Random rnd(test::RandomSeed() + 3);
Add("abc", "v");
Add("abcd", "v");
Add("ac", "v2");
Test(&rnd);
}
}
TEST_F(HarnessTest, SimpleSpecialKey) {
auto args = GenerateArgList();
for (const auto& arg : args) {
Init(arg);
Random rnd(test::RandomSeed() + 4);
Add("\xff\xff", "v3");
Test(&rnd);
}
}
TEST_F(HarnessTest, FooterTests) {
{
// upconvert legacy block based
std::string encoded;
Footer footer(kLegacyBlockBasedTableMagicNumber, 0);
BlockHandle meta_index(10, 5), index(20, 15);
footer.set_metaindex_handle(meta_index);
footer.set_index_handle(index);
footer.EncodeTo(&encoded);
Footer decoded_footer;
Slice encoded_slice(encoded);
decoded_footer.DecodeFrom(&encoded_slice);
ASSERT_EQ(decoded_footer.table_magic_number(), kBlockBasedTableMagicNumber);
ASSERT_EQ(decoded_footer.checksum(), kCRC32c);
ASSERT_EQ(decoded_footer.metaindex_handle().offset(), meta_index.offset());
ASSERT_EQ(decoded_footer.metaindex_handle().size(), meta_index.size());
ASSERT_EQ(decoded_footer.index_handle().offset(), index.offset());
ASSERT_EQ(decoded_footer.index_handle().size(), index.size());
ASSERT_EQ(decoded_footer.version(), 0U);
}
{
// xxhash block based
std::string encoded;
Footer footer(kBlockBasedTableMagicNumber, 1);
BlockHandle meta_index(10, 5), index(20, 15);
footer.set_metaindex_handle(meta_index);
footer.set_index_handle(index);
footer.set_checksum(kxxHash);
footer.EncodeTo(&encoded);
Footer decoded_footer;
Slice encoded_slice(encoded);
decoded_footer.DecodeFrom(&encoded_slice);
ASSERT_EQ(decoded_footer.table_magic_number(), kBlockBasedTableMagicNumber);
ASSERT_EQ(decoded_footer.checksum(), kxxHash);
ASSERT_EQ(decoded_footer.metaindex_handle().offset(), meta_index.offset());
ASSERT_EQ(decoded_footer.metaindex_handle().size(), meta_index.size());
ASSERT_EQ(decoded_footer.index_handle().offset(), index.offset());
ASSERT_EQ(decoded_footer.index_handle().size(), index.size());
ASSERT_EQ(decoded_footer.version(), 1U);
}
{
// xxhash64 block based
std::string encoded;
Footer footer(kBlockBasedTableMagicNumber, 1);
BlockHandle meta_index(10, 5), index(20, 15);
footer.set_metaindex_handle(meta_index);
footer.set_index_handle(index);
footer.set_checksum(kxxHash64);
footer.EncodeTo(&encoded);
Footer decoded_footer;
Slice encoded_slice(encoded);
decoded_footer.DecodeFrom(&encoded_slice);
ASSERT_EQ(decoded_footer.table_magic_number(), kBlockBasedTableMagicNumber);
ASSERT_EQ(decoded_footer.checksum(), kxxHash64);
ASSERT_EQ(decoded_footer.metaindex_handle().offset(), meta_index.offset());
ASSERT_EQ(decoded_footer.metaindex_handle().size(), meta_index.size());
ASSERT_EQ(decoded_footer.index_handle().offset(), index.offset());
ASSERT_EQ(decoded_footer.index_handle().size(), index.size());
ASSERT_EQ(decoded_footer.version(), 1U);
}
// Plain table is not supported in ROCKSDB_LITE
#ifndef ROCKSDB_LITE
{
// upconvert legacy plain table
std::string encoded;
Footer footer(kLegacyPlainTableMagicNumber, 0);
BlockHandle meta_index(10, 5), index(20, 15);
footer.set_metaindex_handle(meta_index);
footer.set_index_handle(index);
footer.EncodeTo(&encoded);
Footer decoded_footer;
Slice encoded_slice(encoded);
decoded_footer.DecodeFrom(&encoded_slice);
ASSERT_EQ(decoded_footer.table_magic_number(), kPlainTableMagicNumber);
ASSERT_EQ(decoded_footer.checksum(), kCRC32c);
ASSERT_EQ(decoded_footer.metaindex_handle().offset(), meta_index.offset());
ASSERT_EQ(decoded_footer.metaindex_handle().size(), meta_index.size());
ASSERT_EQ(decoded_footer.index_handle().offset(), index.offset());
ASSERT_EQ(decoded_footer.index_handle().size(), index.size());
ASSERT_EQ(decoded_footer.version(), 0U);
}
{
// xxhash block based
std::string encoded;
Footer footer(kPlainTableMagicNumber, 1);
BlockHandle meta_index(10, 5), index(20, 15);
footer.set_metaindex_handle(meta_index);
footer.set_index_handle(index);
footer.set_checksum(kxxHash);
footer.EncodeTo(&encoded);
Footer decoded_footer;
Slice encoded_slice(encoded);
decoded_footer.DecodeFrom(&encoded_slice);
ASSERT_EQ(decoded_footer.table_magic_number(), kPlainTableMagicNumber);
ASSERT_EQ(decoded_footer.checksum(), kxxHash);
ASSERT_EQ(decoded_footer.metaindex_handle().offset(), meta_index.offset());
ASSERT_EQ(decoded_footer.metaindex_handle().size(), meta_index.size());
ASSERT_EQ(decoded_footer.index_handle().offset(), index.offset());
ASSERT_EQ(decoded_footer.index_handle().size(), index.size());
ASSERT_EQ(decoded_footer.version(), 1U);
}
#endif // !ROCKSDB_LITE
{
// version == 2
std::string encoded;
Footer footer(kBlockBasedTableMagicNumber, 2);
BlockHandle meta_index(10, 5), index(20, 15);
footer.set_metaindex_handle(meta_index);
footer.set_index_handle(index);
footer.EncodeTo(&encoded);
Footer decoded_footer;
Slice encoded_slice(encoded);
decoded_footer.DecodeFrom(&encoded_slice);
ASSERT_EQ(decoded_footer.table_magic_number(), kBlockBasedTableMagicNumber);
ASSERT_EQ(decoded_footer.checksum(), kCRC32c);
ASSERT_EQ(decoded_footer.metaindex_handle().offset(), meta_index.offset());
ASSERT_EQ(decoded_footer.metaindex_handle().size(), meta_index.size());
ASSERT_EQ(decoded_footer.index_handle().offset(), index.offset());
ASSERT_EQ(decoded_footer.index_handle().size(), index.size());
ASSERT_EQ(decoded_footer.version(), 2U);
}
}
class IndexBlockRestartIntervalTest
: public TableTest,
public ::testing::WithParamInterface<std::pair<int, bool>> {
public:
static std::vector<std::pair<int, bool>> GetRestartValues() {
return {{-1, false}, {0, false}, {1, false}, {8, false},
{16, false}, {32, false}, {-1, true}, {0, true},
{1, true}, {8, true}, {16, true}, {32, true}};
}
};
INSTANTIATE_TEST_CASE_P(
IndexBlockRestartIntervalTest, IndexBlockRestartIntervalTest,
::testing::ValuesIn(IndexBlockRestartIntervalTest::GetRestartValues()));
TEST_P(IndexBlockRestartIntervalTest, IndexBlockRestartInterval) {
const int kKeysInTable = 10000;
const int kKeySize = 100;
const int kValSize = 500;
const int index_block_restart_interval = std::get<0>(GetParam());
const bool value_delta_encoding = std::get<1>(GetParam());
Options options;
BlockBasedTableOptions table_options;
table_options.block_size = 64; // small block size to get big index block
table_options.index_block_restart_interval = index_block_restart_interval;
if (value_delta_encoding) {
table_options.format_version = 4;
}
options.table_factory.reset(new BlockBasedTableFactory(table_options));
TableConstructor c(BytewiseComparator());
static Random rnd(301);
for (int i = 0; i < kKeysInTable; i++) {
InternalKey k(RandomString(&rnd, kKeySize), 0, kTypeValue);
c.Add(k.Encode().ToString(), RandomString(&rnd, kValSize));
}
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
std::unique_ptr<InternalKeyComparator> comparator(
new InternalKeyComparator(BytewiseComparator()));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_options, *comparator, &keys,
&kvmap);
auto reader = c.GetTableReader();
std::unique_ptr<InternalIterator> db_iter(reader->NewIterator(
ReadOptions(), moptions.prefix_extractor.get(), /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized));
// Test point lookup
for (auto& kv : kvmap) {
db_iter->Seek(kv.first);
ASSERT_TRUE(db_iter->Valid());
ASSERT_OK(db_iter->status());
ASSERT_EQ(db_iter->key(), kv.first);
ASSERT_EQ(db_iter->value(), kv.second);
}
// Test iterating
auto kv_iter = kvmap.begin();
for (db_iter->SeekToFirst(); db_iter->Valid(); db_iter->Next()) {
ASSERT_EQ(db_iter->key(), kv_iter->first);
ASSERT_EQ(db_iter->value(), kv_iter->second);
kv_iter++;
}
ASSERT_EQ(kv_iter, kvmap.end());
c.ResetTableReader();
}
class PrefixTest : public testing::Test {
public:
PrefixTest() : testing::Test() {}
~PrefixTest() override {}
};
namespace {
// A simple PrefixExtractor that only works for test PrefixAndWholeKeyTest
class TestPrefixExtractor : public rocksdb::SliceTransform {
public:
~TestPrefixExtractor() override{};
const char* Name() const override { return "TestPrefixExtractor"; }
rocksdb::Slice Transform(const rocksdb::Slice& src) const override {
assert(IsValid(src));
return rocksdb::Slice(src.data(), 3);
}
bool InDomain(const rocksdb::Slice& src) const override {
assert(IsValid(src));
return true;
}
bool InRange(const rocksdb::Slice& /*dst*/) const override { return true; }
bool IsValid(const rocksdb::Slice& src) const {
if (src.size() != 4) {
return false;
}
if (src[0] != '[') {
return false;
}
if (src[1] < '0' || src[1] > '9') {
return false;
}
if (src[2] != ']') {
return false;
}
if (src[3] < '0' || src[3] > '9') {
return false;
}
return true;
}
};
} // namespace
TEST_F(PrefixTest, PrefixAndWholeKeyTest) {
rocksdb::Options options;
options.compaction_style = rocksdb::kCompactionStyleUniversal;
options.num_levels = 20;
options.create_if_missing = true;
options.optimize_filters_for_hits = false;
options.target_file_size_base = 268435456;
options.prefix_extractor = std::make_shared<TestPrefixExtractor>();
rocksdb::BlockBasedTableOptions bbto;
bbto.filter_policy.reset(rocksdb::NewBloomFilterPolicy(10));
bbto.block_size = 262144;
bbto.whole_key_filtering = true;
const std::string kDBPath = test::PerThreadDBPath("table_prefix_test");
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
DestroyDB(kDBPath, options);
rocksdb::DB* db;
ASSERT_OK(rocksdb::DB::Open(options, kDBPath, &db));
// Create a bunch of keys with 10 filters.
for (int i = 0; i < 10; i++) {
std::string prefix = "[" + std::to_string(i) + "]";
for (int j = 0; j < 10; j++) {
std::string key = prefix + std::to_string(j);
db->Put(rocksdb::WriteOptions(), key, "1");
}
}
// Trigger compaction.
db->CompactRange(CompactRangeOptions(), nullptr, nullptr);
delete db;
// In the second round, turn whole_key_filtering off and expect
// rocksdb still works.
}
/*
* Disable TableWithGlobalSeqno since RocksDB does not store global_seqno in
* the SST file any more. Instead, RocksDB deduces global_seqno from the
* MANIFEST while reading from an SST. Therefore, it's not possible to test the
* functionality of global_seqno in a single, isolated unit test without the
* involvement of Version, VersionSet, etc.
*/
TEST_P(BlockBasedTableTest, DISABLED_TableWithGlobalSeqno) {
BlockBasedTableOptions bbto = GetBlockBasedTableOptions();
test::StringSink* sink = new test::StringSink();
std::unique_ptr<WritableFileWriter> file_writer(
test::GetWritableFileWriter(sink, "" /* don't care */));
Options options;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
InternalKeyComparator ikc(options.comparator);
std::vector<std::unique_ptr<IntTblPropCollectorFactory>>
int_tbl_prop_collector_factories;
int_tbl_prop_collector_factories.emplace_back(
new SstFileWriterPropertiesCollectorFactory(2 /* version */,
0 /* global_seqno*/));
std::string column_family_name;
std::unique_ptr<TableBuilder> builder(options.table_factory->NewTableBuilder(
TableBuilderOptions(ioptions, moptions, ikc,
&int_tbl_prop_collector_factories, kNoCompression,
0 /* sample_for_compression */, CompressionOptions(),
false /* skip_filters */, column_family_name, -1),
TablePropertiesCollectorFactory::Context::kUnknownColumnFamily,
file_writer.get()));
for (char c = 'a'; c <= 'z'; ++c) {
std::string key(8, c);
std::string value = key;
InternalKey ik(key, 0, kTypeValue);
builder->Add(ik.Encode(), value);
}
ASSERT_OK(builder->Finish());
file_writer->Flush();
test::RandomRWStringSink ss_rw(sink);
uint32_t version;
uint64_t global_seqno;
uint64_t global_seqno_offset;
// Helper function to get version, global_seqno, global_seqno_offset
std::function<void()> GetVersionAndGlobalSeqno = [&]() {
std::unique_ptr<RandomAccessFileReader> file_reader(
test::GetRandomAccessFileReader(
new test::StringSource(ss_rw.contents(), 73342, true)));
TableProperties* props = nullptr;
ASSERT_OK(ReadTableProperties(file_reader.get(), ss_rw.contents().size(),
kBlockBasedTableMagicNumber, ioptions,
&props, true /* compression_type_missing */));
UserCollectedProperties user_props = props->user_collected_properties;
version = DecodeFixed32(
user_props[ExternalSstFilePropertyNames::kVersion].c_str());
global_seqno = DecodeFixed64(
user_props[ExternalSstFilePropertyNames::kGlobalSeqno].c_str());
global_seqno_offset =
props->properties_offsets[ExternalSstFilePropertyNames::kGlobalSeqno];
delete props;
};
// Helper function to update the value of the global seqno in the file
std::function<void(uint64_t)> SetGlobalSeqno = [&](uint64_t val) {
std::string new_global_seqno;
PutFixed64(&new_global_seqno, val);
ASSERT_OK(ss_rw.Write(global_seqno_offset, new_global_seqno));
};
// Helper function to get the contents of the table InternalIterator
std::unique_ptr<TableReader> table_reader;
std::function<InternalIterator*()> GetTableInternalIter = [&]() {
std::unique_ptr<RandomAccessFileReader> file_reader(
test::GetRandomAccessFileReader(
new test::StringSource(ss_rw.contents(), 73342, true)));
options.table_factory->NewTableReader(
TableReaderOptions(ioptions, moptions.prefix_extractor.get(),
EnvOptions(), ikc),
std::move(file_reader), ss_rw.contents().size(), &table_reader);
return table_reader->NewIterator(
ReadOptions(), moptions.prefix_extractor.get(), /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized);
};
GetVersionAndGlobalSeqno();
ASSERT_EQ(2u, version);
ASSERT_EQ(0u, global_seqno);
InternalIterator* iter = GetTableInternalIter();
char current_c = 'a';
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
ParsedInternalKey pik;
ASSERT_TRUE(ParseInternalKey(iter->key(), &pik));
ASSERT_EQ(pik.type, ValueType::kTypeValue);
ASSERT_EQ(pik.sequence, 0);
ASSERT_EQ(pik.user_key, iter->value());
ASSERT_EQ(pik.user_key.ToString(), std::string(8, current_c));
current_c++;
}
ASSERT_EQ(current_c, 'z' + 1);
delete iter;
// Update global sequence number to 10
SetGlobalSeqno(10);
GetVersionAndGlobalSeqno();
ASSERT_EQ(2u, version);
ASSERT_EQ(10u, global_seqno);
iter = GetTableInternalIter();
current_c = 'a';
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
ParsedInternalKey pik;
ASSERT_TRUE(ParseInternalKey(iter->key(), &pik));
ASSERT_EQ(pik.type, ValueType::kTypeValue);
ASSERT_EQ(pik.sequence, 10);
ASSERT_EQ(pik.user_key, iter->value());
ASSERT_EQ(pik.user_key.ToString(), std::string(8, current_c));
current_c++;
}
ASSERT_EQ(current_c, 'z' + 1);
// Verify Seek
for (char c = 'a'; c <= 'z'; c++) {
std::string k = std::string(8, c);
InternalKey ik(k, 10, kValueTypeForSeek);
iter->Seek(ik.Encode());
ASSERT_TRUE(iter->Valid());
ParsedInternalKey pik;
ASSERT_TRUE(ParseInternalKey(iter->key(), &pik));
ASSERT_EQ(pik.type, ValueType::kTypeValue);
ASSERT_EQ(pik.sequence, 10);
ASSERT_EQ(pik.user_key.ToString(), k);
ASSERT_EQ(iter->value().ToString(), k);
}
delete iter;
// Update global sequence number to 3
SetGlobalSeqno(3);
GetVersionAndGlobalSeqno();
ASSERT_EQ(2u, version);
ASSERT_EQ(3u, global_seqno);
iter = GetTableInternalIter();
current_c = 'a';
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
ParsedInternalKey pik;
ASSERT_TRUE(ParseInternalKey(iter->key(), &pik));
ASSERT_EQ(pik.type, ValueType::kTypeValue);
ASSERT_EQ(pik.sequence, 3);
ASSERT_EQ(pik.user_key, iter->value());
ASSERT_EQ(pik.user_key.ToString(), std::string(8, current_c));
current_c++;
}
ASSERT_EQ(current_c, 'z' + 1);
// Verify Seek
for (char c = 'a'; c <= 'z'; c++) {
std::string k = std::string(8, c);
// seqno=4 is less than 3 so we still should get our key
InternalKey ik(k, 4, kValueTypeForSeek);
iter->Seek(ik.Encode());
ASSERT_TRUE(iter->Valid());
ParsedInternalKey pik;
ASSERT_TRUE(ParseInternalKey(iter->key(), &pik));
ASSERT_EQ(pik.type, ValueType::kTypeValue);
ASSERT_EQ(pik.sequence, 3);
ASSERT_EQ(pik.user_key.ToString(), k);
ASSERT_EQ(iter->value().ToString(), k);
}
delete iter;
}
TEST_P(BlockBasedTableTest, BlockAlignTest) {
BlockBasedTableOptions bbto = GetBlockBasedTableOptions();
bbto.block_align = true;
test::StringSink* sink = new test::StringSink();
std::unique_ptr<WritableFileWriter> file_writer(
test::GetWritableFileWriter(sink, "" /* don't care */));
Options options;
options.compression = kNoCompression;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
InternalKeyComparator ikc(options.comparator);
std::vector<std::unique_ptr<IntTblPropCollectorFactory>>
int_tbl_prop_collector_factories;
std::string column_family_name;
std::unique_ptr<TableBuilder> builder(options.table_factory->NewTableBuilder(
TableBuilderOptions(ioptions, moptions, ikc,
&int_tbl_prop_collector_factories, kNoCompression,
0 /* sample_for_compression */, CompressionOptions(),
false /* skip_filters */, column_family_name, -1),
TablePropertiesCollectorFactory::Context::kUnknownColumnFamily,
file_writer.get()));
for (int i = 1; i <= 10000; ++i) {
std::ostringstream ostr;
ostr << std::setfill('0') << std::setw(5) << i;
std::string key = ostr.str();
std::string value = "val";
InternalKey ik(key, 0, kTypeValue);
builder->Add(ik.Encode(), value);
}
ASSERT_OK(builder->Finish());
file_writer->Flush();
test::RandomRWStringSink ss_rw(sink);
std::unique_ptr<RandomAccessFileReader> file_reader(
test::GetRandomAccessFileReader(
new test::StringSource(ss_rw.contents(), 73342, true)));
// Helper function to get version, global_seqno, global_seqno_offset
std::function<void()> VerifyBlockAlignment = [&]() {
TableProperties* props = nullptr;
ASSERT_OK(ReadTableProperties(file_reader.get(), ss_rw.contents().size(),
kBlockBasedTableMagicNumber, ioptions,
&props, true /* compression_type_missing */));
uint64_t data_block_size = props->data_size / props->num_data_blocks;
ASSERT_EQ(data_block_size, 4096);
ASSERT_EQ(props->data_size, data_block_size * props->num_data_blocks);
delete props;
};
VerifyBlockAlignment();
// The below block of code verifies that we can read back the keys. Set
// block_align to false when creating the reader to ensure we can flip between
// the two modes without any issues
std::unique_ptr<TableReader> table_reader;
bbto.block_align = false;
Options options2;
options2.table_factory.reset(NewBlockBasedTableFactory(bbto));
ImmutableCFOptions ioptions2(options2);
const MutableCFOptions moptions2(options2);
ASSERT_OK(ioptions.table_factory->NewTableReader(
TableReaderOptions(ioptions2, moptions2.prefix_extractor.get(),
EnvOptions(),
GetPlainInternalComparator(options2.comparator)),
std::move(file_reader), ss_rw.contents().size(), &table_reader));
std::unique_ptr<InternalIterator> db_iter(table_reader->NewIterator(
ReadOptions(), moptions2.prefix_extractor.get(), /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized));
int expected_key = 1;
for (db_iter->SeekToFirst(); db_iter->Valid(); db_iter->Next()) {
std::ostringstream ostr;
ostr << std::setfill('0') << std::setw(5) << expected_key++;
std::string key = ostr.str();
std::string value = "val";
ASSERT_OK(db_iter->status());
ASSERT_EQ(ExtractUserKey(db_iter->key()).ToString(), key);
ASSERT_EQ(db_iter->value().ToString(), value);
}
expected_key--;
ASSERT_EQ(expected_key, 10000);
table_reader.reset();
}
TEST_P(BlockBasedTableTest, PropertiesBlockRestartPointTest) {
BlockBasedTableOptions bbto = GetBlockBasedTableOptions();
bbto.block_align = true;
test::StringSink* sink = new test::StringSink();
std::unique_ptr<WritableFileWriter> file_writer(
test::GetWritableFileWriter(sink, "" /* don't care */));
Options options;
options.compression = kNoCompression;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
InternalKeyComparator ikc(options.comparator);
std::vector<std::unique_ptr<IntTblPropCollectorFactory>>
int_tbl_prop_collector_factories;
std::string column_family_name;
std::unique_ptr<TableBuilder> builder(options.table_factory->NewTableBuilder(
TableBuilderOptions(ioptions, moptions, ikc,
&int_tbl_prop_collector_factories, kNoCompression,
0 /* sample_for_compression */, CompressionOptions(),
false /* skip_filters */, column_family_name, -1),
TablePropertiesCollectorFactory::Context::kUnknownColumnFamily,
file_writer.get()));
for (int i = 1; i <= 10000; ++i) {
std::ostringstream ostr;
ostr << std::setfill('0') << std::setw(5) << i;
std::string key = ostr.str();
std::string value = "val";
InternalKey ik(key, 0, kTypeValue);
builder->Add(ik.Encode(), value);
}
ASSERT_OK(builder->Finish());
file_writer->Flush();
test::RandomRWStringSink ss_rw(sink);
std::unique_ptr<RandomAccessFileReader> file_reader(
test::GetRandomAccessFileReader(
new test::StringSource(ss_rw.contents(), 73342, true)));
{
RandomAccessFileReader* file = file_reader.get();
uint64_t file_size = ss_rw.contents().size();
Footer footer;
ASSERT_OK(ReadFooterFromFile(file, nullptr /* prefetch_buffer */, file_size,
&footer, kBlockBasedTableMagicNumber));
auto BlockFetchHelper = [&](const BlockHandle& handle, BlockType block_type,
BlockContents* contents) {
ReadOptions read_options;
read_options.verify_checksums = false;
PersistentCacheOptions cache_options;
BlockFetcher block_fetcher(
file, nullptr /* prefetch_buffer */, footer, read_options, handle,
contents, ioptions, false /* decompress */,
false /*maybe_compressed*/, block_type,
UncompressionDict::GetEmptyDict(), cache_options);
ASSERT_OK(block_fetcher.ReadBlockContents());
};
// -- Read metaindex block
auto metaindex_handle = footer.metaindex_handle();
BlockContents metaindex_contents;
BlockFetchHelper(metaindex_handle, BlockType::kMetaIndex,
&metaindex_contents);
Block metaindex_block(std::move(metaindex_contents),
kDisableGlobalSequenceNumber);
std::unique_ptr<InternalIterator> meta_iter(metaindex_block.NewDataIterator(
BytewiseComparator(), BytewiseComparator()));
bool found_properties_block = true;
ASSERT_OK(SeekToPropertiesBlock(meta_iter.get(), &found_properties_block));
ASSERT_TRUE(found_properties_block);
// -- Read properties block
Slice v = meta_iter->value();
BlockHandle properties_handle;
ASSERT_OK(properties_handle.DecodeFrom(&v));
BlockContents properties_contents;
BlockFetchHelper(properties_handle, BlockType::kProperties,
&properties_contents);
Block properties_block(std::move(properties_contents),
kDisableGlobalSequenceNumber);
ASSERT_EQ(properties_block.NumRestarts(), 1u);
}
}
TEST_P(BlockBasedTableTest, PropertiesMetaBlockLast) {
// The properties meta-block should come at the end since we always need to
// read it when opening a file, unlike index/filter/other meta-blocks, which
// are sometimes read depending on the user's configuration. This ordering
// allows us to do a small readahead on the end of the file to read properties
// and meta-index blocks with one I/O.
TableConstructor c(BytewiseComparator(), true /* convert_to_internal_key_ */);
c.Add("a1", "val1");
c.Add("b2", "val2");
c.Add("c3", "val3");
c.Add("d4", "val4");
c.Add("e5", "val5");
c.Add("f6", "val6");
c.Add("g7", "val7");
c.Add("h8", "val8");
c.Add("j9", "val9");
// write an SST file
Options options;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.filter_policy.reset(NewBloomFilterPolicy(
8 /* bits_per_key */, false /* use_block_based_filter */));
options.table_factory.reset(NewBlockBasedTableFactory(table_options));
ImmutableCFOptions ioptions(options);
MutableCFOptions moptions(options);
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
c.Finish(options, ioptions, moptions, table_options,
GetPlainInternalComparator(options.comparator), &keys, &kvmap);
// get file reader
test::StringSink* table_sink = c.TEST_GetSink();
std::unique_ptr<RandomAccessFileReader> table_reader{
test::GetRandomAccessFileReader(
new test::StringSource(table_sink->contents(), 0 /* unique_id */,
false /* allow_mmap_reads */))};
size_t table_size = table_sink->contents().size();
// read footer
Footer footer;
ASSERT_OK(ReadFooterFromFile(table_reader.get(),
nullptr /* prefetch_buffer */, table_size,
&footer, kBlockBasedTableMagicNumber));
// read metaindex
auto metaindex_handle = footer.metaindex_handle();
BlockContents metaindex_contents;
PersistentCacheOptions pcache_opts;
BlockFetcher block_fetcher(
table_reader.get(), nullptr /* prefetch_buffer */, footer, ReadOptions(),
metaindex_handle, &metaindex_contents, ioptions, false /* decompress */,
false /*maybe_compressed*/, BlockType::kMetaIndex,
UncompressionDict::GetEmptyDict(), pcache_opts,
nullptr /*memory_allocator*/);
ASSERT_OK(block_fetcher.ReadBlockContents());
Block metaindex_block(std::move(metaindex_contents),
kDisableGlobalSequenceNumber);
// verify properties block comes last
std::unique_ptr<InternalIterator> metaindex_iter{
metaindex_block.NewDataIterator(options.comparator, options.comparator)};
uint64_t max_offset = 0;
std::string key_at_max_offset;
for (metaindex_iter->SeekToFirst(); metaindex_iter->Valid();
metaindex_iter->Next()) {
BlockHandle handle;
Slice value = metaindex_iter->value();
ASSERT_OK(handle.DecodeFrom(&value));
if (handle.offset() > max_offset) {
max_offset = handle.offset();
key_at_max_offset = metaindex_iter->key().ToString();
}
}
ASSERT_EQ(kPropertiesBlock, key_at_max_offset);
// index handle is stored in footer rather than metaindex block, so need
// separate logic to verify it comes before properties block.
ASSERT_GT(max_offset, footer.index_handle().offset());
c.ResetTableReader();
}
TEST_P(BlockBasedTableTest, BadOptions) {
rocksdb::Options options;
options.compression = kNoCompression;
BlockBasedTableOptions bbto = GetBlockBasedTableOptions();
bbto.block_size = 4000;
bbto.block_align = true;
const std::string kDBPath =
test::PerThreadDBPath("block_based_table_bad_options_test");
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
DestroyDB(kDBPath, options);
rocksdb::DB* db;
ASSERT_NOK(rocksdb::DB::Open(options, kDBPath, &db));
bbto.block_size = 4096;
options.compression = kSnappyCompression;
options.table_factory.reset(NewBlockBasedTableFactory(bbto));
ASSERT_NOK(rocksdb::DB::Open(options, kDBPath, &db));
}
TEST_F(BBTTailPrefetchTest, TestTailPrefetchStats) {
TailPrefetchStats tpstats;
ASSERT_EQ(0, tpstats.GetSuggestedPrefetchSize());
tpstats.RecordEffectiveSize(size_t{1000});
tpstats.RecordEffectiveSize(size_t{1005});
tpstats.RecordEffectiveSize(size_t{1002});
ASSERT_EQ(1005, tpstats.GetSuggestedPrefetchSize());
// One single super large value shouldn't influence much
tpstats.RecordEffectiveSize(size_t{1002000});
tpstats.RecordEffectiveSize(size_t{999});
ASSERT_LE(1005, tpstats.GetSuggestedPrefetchSize());
ASSERT_GT(1200, tpstats.GetSuggestedPrefetchSize());
// Only history of 32 is kept
for (int i = 0; i < 32; i++) {
tpstats.RecordEffectiveSize(size_t{100});
}
ASSERT_EQ(100, tpstats.GetSuggestedPrefetchSize());
// 16 large values and 16 small values. The result should be closer
// to the small value as the algorithm.
for (int i = 0; i < 16; i++) {
tpstats.RecordEffectiveSize(size_t{1000});
}
tpstats.RecordEffectiveSize(size_t{10});
tpstats.RecordEffectiveSize(size_t{20});
for (int i = 0; i < 6; i++) {
tpstats.RecordEffectiveSize(size_t{100});
}
ASSERT_LE(80, tpstats.GetSuggestedPrefetchSize());
ASSERT_GT(200, tpstats.GetSuggestedPrefetchSize());
}
TEST_F(BBTTailPrefetchTest, FilePrefetchBufferMinOffset) {
TailPrefetchStats tpstats;
FilePrefetchBuffer buffer(nullptr, 0, 0, false, true);
buffer.TryReadFromCache(500, 10, nullptr);
buffer.TryReadFromCache(480, 10, nullptr);
buffer.TryReadFromCache(490, 10, nullptr);
ASSERT_EQ(480, buffer.min_offset_read());
}
TEST_P(BlockBasedTableTest, DataBlockHashIndex) {
const int kNumKeys = 500;
const int kKeySize = 8;
const int kValSize = 40;
BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
table_options.data_block_index_type =
BlockBasedTableOptions::kDataBlockBinaryAndHash;
Options options;
options.comparator = BytewiseComparator();
options.table_factory.reset(new BlockBasedTableFactory(table_options));
TableConstructor c(options.comparator);
static Random rnd(1048);
for (int i = 0; i < kNumKeys; i++) {
// padding one "0" to mark existent keys.
std::string random_key(RandomString(&rnd, kKeySize - 1) + "1");
InternalKey k(random_key, 0, kTypeValue);
c.Add(k.Encode().ToString(), RandomString(&rnd, kValSize));
}
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
const InternalKeyComparator internal_comparator(options.comparator);
c.Finish(options, ioptions, moptions, table_options, internal_comparator,
&keys, &kvmap);
auto reader = c.GetTableReader();
std::unique_ptr<InternalIterator> seek_iter;
seek_iter.reset(reader->NewIterator(
ReadOptions(), moptions.prefix_extractor.get(), /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized));
for (int i = 0; i < 2; ++i) {
ReadOptions ro;
// for every kv, we seek using two method: Get() and Seek()
// Get() will use the SuffixIndexHash in Block. For non-existent key it
// will invalidate the iterator
// Seek() will use the default BinarySeek() in Block. So for non-existent
// key it will land at the closest key that is large than target.
// Search for existent keys
for (auto& kv : kvmap) {
if (i == 0) {
// Search using Seek()
seek_iter->Seek(kv.first);
ASSERT_OK(seek_iter->status());
ASSERT_TRUE(seek_iter->Valid());
ASSERT_EQ(seek_iter->key(), kv.first);
ASSERT_EQ(seek_iter->value(), kv.second);
} else {
// Search using Get()
PinnableSlice value;
std::string user_key = ExtractUserKey(kv.first).ToString();
GetContext get_context(options.comparator, nullptr, nullptr, nullptr,
GetContext::kNotFound, user_key, &value, nullptr,
nullptr, true, nullptr, nullptr);
ASSERT_OK(reader->Get(ro, kv.first, &get_context,
moptions.prefix_extractor.get()));
ASSERT_EQ(get_context.State(), GetContext::kFound);
ASSERT_EQ(value, Slice(kv.second));
value.Reset();
}
}
// Search for non-existent keys
for (auto& kv : kvmap) {
std::string user_key = ExtractUserKey(kv.first).ToString();
user_key.back() = '0'; // make it non-existent key
InternalKey internal_key(user_key, 0, kTypeValue);
std::string encoded_key = internal_key.Encode().ToString();
if (i == 0) { // Search using Seek()
seek_iter->Seek(encoded_key);
ASSERT_OK(seek_iter->status());
if (seek_iter->Valid()) {
ASSERT_TRUE(BytewiseComparator()->Compare(
user_key, ExtractUserKey(seek_iter->key())) < 0);
}
} else { // Search using Get()
PinnableSlice value;
GetContext get_context(options.comparator, nullptr, nullptr, nullptr,
GetContext::kNotFound, user_key, &value, nullptr,
nullptr, true, nullptr, nullptr);
ASSERT_OK(reader->Get(ro, encoded_key, &get_context,
moptions.prefix_extractor.get()));
ASSERT_EQ(get_context.State(), GetContext::kNotFound);
value.Reset();
}
}
}
}
// BlockBasedTableIterator should invalidate itself and return
// OutOfBound()=true immediately after Seek(), to allow LevelIterator
// filter out corresponding level.
TEST_P(BlockBasedTableTest, OutOfBoundOnSeek) {
TableConstructor c(BytewiseComparator(), true /*convert_to_internal_key*/);
c.Add("foo", "v1");
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
Options options;
BlockBasedTableOptions table_opt(GetBlockBasedTableOptions());
options.table_factory.reset(NewBlockBasedTableFactory(table_opt));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_opt,
GetPlainInternalComparator(BytewiseComparator()), &keys, &kvmap);
auto* reader = c.GetTableReader();
ReadOptions read_opt;
std::string upper_bound = "bar";
Slice upper_bound_slice(upper_bound);
read_opt.iterate_upper_bound = &upper_bound_slice;
std::unique_ptr<InternalIterator> iter;
iter.reset(new KeyConvertingIterator(reader->NewIterator(
read_opt, /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized)));
iter->SeekToFirst();
ASSERT_FALSE(iter->Valid());
ASSERT_TRUE(iter->IsOutOfBound());
iter.reset(new KeyConvertingIterator(reader->NewIterator(
read_opt, /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized)));
iter->Seek("foo");
ASSERT_FALSE(iter->Valid());
ASSERT_TRUE(iter->IsOutOfBound());
}
// BlockBasedTableIterator should invalidate itself and return
// OutOfBound()=true after Next(), if it finds current index key is no smaller
// than upper bound, unless it is pointing to the last data block.
TEST_P(BlockBasedTableTest, OutOfBoundOnNext) {
TableConstructor c(BytewiseComparator(), true /*convert_to_internal_key*/);
c.Add("bar", "v");
c.Add("foo", "v");
std::vector<std::string> keys;
stl_wrappers::KVMap kvmap;
Options options;
BlockBasedTableOptions table_opt(GetBlockBasedTableOptions());
table_opt.flush_block_policy_factory =
std::make_shared<FlushBlockEveryKeyPolicyFactory>();
options.table_factory.reset(NewBlockBasedTableFactory(table_opt));
const ImmutableCFOptions ioptions(options);
const MutableCFOptions moptions(options);
c.Finish(options, ioptions, moptions, table_opt,
GetPlainInternalComparator(BytewiseComparator()), &keys, &kvmap);
auto* reader = c.GetTableReader();
ReadOptions read_opt;
std::string ub1 = "bar_after";
Slice ub_slice1(ub1);
read_opt.iterate_upper_bound = &ub_slice1;
std::unique_ptr<InternalIterator> iter;
iter.reset(new KeyConvertingIterator(reader->NewIterator(
read_opt, /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized)));
iter->Seek("bar");
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("bar", iter->key());
iter->Next();
ASSERT_FALSE(iter->Valid());
ASSERT_TRUE(iter->IsOutOfBound());
std::string ub2 = "foo_after";
Slice ub_slice2(ub2);
read_opt.iterate_upper_bound = &ub_slice2;
iter.reset(new KeyConvertingIterator(reader->NewIterator(
read_opt, /*prefix_extractor=*/nullptr, /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kUncategorized)));
iter->Seek("foo");
ASSERT_TRUE(iter->Valid());
ASSERT_EQ("foo", iter->key());
iter->Next();
ASSERT_FALSE(iter->Valid());
ASSERT_FALSE(iter->IsOutOfBound());
}
} // namespace rocksdb
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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