19ec44fd39
Summary: Add hash index support to data blocks, which helps to reduce the CPU utilization of point-lookup operations. This feature is backward compatible with the data block created without the hash index. It is disabled by default unless `BlockBasedTableOptions::data_block_index_type` is set to `data_block_index_type = kDataBlockBinaryAndHash.` The DB size would be bigger with the hash index option as a hash table is added at the end of each data block. If the hash utilization ratio is 1:1, the space overhead is one byte per key. The hash table utilization ratio is adjustable using `BlockBasedTableOptions::data_block_hash_table_util_ratio`. A lower utilization ratio will improve more on the point-lookup efficiency, but take more space too. Pull Request resolved: https://github.com/facebook/rocksdb/pull/4174 Differential Revision: D8965914 Pulled By: fgwu fbshipit-source-id: 1c6bae5d1fc39c80282d8890a72e9e67bc247198
474 lines
21 KiB
C++
474 lines
21 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#ifndef __STDC_FORMAT_MACROS
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#define __STDC_FORMAT_MACROS
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#endif
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#include <cstring>
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#include "options/options_helper.h"
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#include "rocksdb/convenience.h"
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#include "util/testharness.h"
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#ifndef GFLAGS
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bool FLAGS_enable_print = false;
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#else
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#include "util/gflags_compat.h"
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using GFLAGS_NAMESPACE::ParseCommandLineFlags;
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DEFINE_bool(enable_print, false, "Print options generated to console.");
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#endif // GFLAGS
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namespace rocksdb {
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// Verify options are settable from options strings.
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// We take the approach that depends on compiler behavior that copy constructor
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// won't touch implicit padding bytes, so that the test is fragile.
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// As a result, we only run the tests to verify new fields in options are
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// settable through string on limited platforms as it depends on behavior of
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// compilers.
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#ifndef ROCKSDB_LITE
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#if defined OS_LINUX || defined OS_WIN
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#ifndef __clang__
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class OptionsSettableTest : public testing::Test {
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public:
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OptionsSettableTest() {}
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};
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const char kSpecialChar = 'z';
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typedef std::vector<std::pair<size_t, size_t>> OffsetGap;
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void FillWithSpecialChar(char* start_ptr, size_t total_size,
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const OffsetGap& blacklist) {
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size_t offset = 0;
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for (auto& pair : blacklist) {
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std::memset(start_ptr + offset, kSpecialChar, pair.first - offset);
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offset = pair.first + pair.second;
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}
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std::memset(start_ptr + offset, kSpecialChar, total_size - offset);
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}
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int NumUnsetBytes(char* start_ptr, size_t total_size,
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const OffsetGap& blacklist) {
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int total_unset_bytes_base = 0;
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size_t offset = 0;
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for (auto& pair : blacklist) {
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for (char* ptr = start_ptr + offset; ptr < start_ptr + pair.first; ptr++) {
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if (*ptr == kSpecialChar) {
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total_unset_bytes_base++;
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}
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}
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offset = pair.first + pair.second;
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}
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for (char* ptr = start_ptr + offset; ptr < start_ptr + total_size; ptr++) {
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if (*ptr == kSpecialChar) {
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total_unset_bytes_base++;
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}
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}
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return total_unset_bytes_base;
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}
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// If the test fails, likely a new option is added to BlockBasedTableOptions
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// but it cannot be set through GetBlockBasedTableOptionsFromString(), or the
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// test is not updated accordingly.
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// After adding an option, we need to make sure it is settable by
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// GetBlockBasedTableOptionsFromString() and add the option to the input string
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// passed to the GetBlockBasedTableOptionsFromString() in this test.
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// If it is a complicated type, you also need to add the field to
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// kBbtoBlacklist, and maybe add customized verification for it.
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TEST_F(OptionsSettableTest, BlockBasedTableOptionsAllFieldsSettable) {
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// Items in the form of <offset, size>. Need to be in ascending order
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// and not overlapping. Need to updated if new pointer-option is added.
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const OffsetGap kBbtoBlacklist = {
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{offsetof(struct BlockBasedTableOptions, flush_block_policy_factory),
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sizeof(std::shared_ptr<FlushBlockPolicyFactory>)},
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{offsetof(struct BlockBasedTableOptions, block_cache),
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sizeof(std::shared_ptr<Cache>)},
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{offsetof(struct BlockBasedTableOptions, persistent_cache),
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sizeof(std::shared_ptr<PersistentCache>)},
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{offsetof(struct BlockBasedTableOptions, block_cache_compressed),
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sizeof(std::shared_ptr<Cache>)},
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{offsetof(struct BlockBasedTableOptions, filter_policy),
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sizeof(std::shared_ptr<const FilterPolicy>)},
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};
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// In this test, we catch a new option of BlockBasedTableOptions that is not
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// settable through GetBlockBasedTableOptionsFromString().
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// We count padding bytes of the option struct, and assert it to be the same
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// as unset bytes of an option struct initialized by
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// GetBlockBasedTableOptionsFromString().
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char* bbto_ptr = new char[sizeof(BlockBasedTableOptions)];
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// Count padding bytes by setting all bytes in the memory to a special char,
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// copy a well constructed struct to this memory and see how many special
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// bytes left.
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BlockBasedTableOptions* bbto = new (bbto_ptr) BlockBasedTableOptions();
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FillWithSpecialChar(bbto_ptr, sizeof(BlockBasedTableOptions), kBbtoBlacklist);
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// It based on the behavior of compiler that padding bytes are not changed
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// when copying the struct. It's prone to failure when compiler behavior
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// changes. We verify there is unset bytes to detect the case.
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*bbto = BlockBasedTableOptions();
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int unset_bytes_base =
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NumUnsetBytes(bbto_ptr, sizeof(BlockBasedTableOptions), kBbtoBlacklist);
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ASSERT_GT(unset_bytes_base, 0);
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bbto->~BlockBasedTableOptions();
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// Construct the base option passed into
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// GetBlockBasedTableOptionsFromString().
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bbto = new (bbto_ptr) BlockBasedTableOptions();
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FillWithSpecialChar(bbto_ptr, sizeof(BlockBasedTableOptions), kBbtoBlacklist);
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// This option is not setable:
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bbto->use_delta_encoding = true;
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char* new_bbto_ptr = new char[sizeof(BlockBasedTableOptions)];
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BlockBasedTableOptions* new_bbto =
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new (new_bbto_ptr) BlockBasedTableOptions();
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FillWithSpecialChar(new_bbto_ptr, sizeof(BlockBasedTableOptions),
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kBbtoBlacklist);
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// Need to update the option string if a new option is added.
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ASSERT_OK(GetBlockBasedTableOptionsFromString(
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*bbto,
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"cache_index_and_filter_blocks=1;"
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"cache_index_and_filter_blocks_with_high_priority=true;"
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"pin_l0_filter_and_index_blocks_in_cache=1;"
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"pin_top_level_index_and_filter=1;"
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"index_type=kHashSearch;"
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"data_block_index_type=kDataBlockBinaryAndHash;"
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"data_block_hash_table_util_ratio=0.75;"
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"checksum=kxxHash;hash_index_allow_collision=1;no_block_cache=1;"
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"block_cache=1M;block_cache_compressed=1k;block_size=1024;"
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"block_size_deviation=8;block_restart_interval=4; "
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"metadata_block_size=1024;"
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"partition_filters=false;"
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"index_block_restart_interval=4;"
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"filter_policy=bloomfilter:4:true;whole_key_filtering=1;"
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"format_version=1;"
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"hash_index_allow_collision=false;"
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"verify_compression=true;read_amp_bytes_per_bit=0;"
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"enable_index_compression=false;"
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"block_align=true",
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new_bbto));
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ASSERT_EQ(unset_bytes_base,
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NumUnsetBytes(new_bbto_ptr, sizeof(BlockBasedTableOptions),
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kBbtoBlacklist));
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ASSERT_TRUE(new_bbto->block_cache.get() != nullptr);
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ASSERT_TRUE(new_bbto->block_cache_compressed.get() != nullptr);
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ASSERT_TRUE(new_bbto->filter_policy.get() != nullptr);
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bbto->~BlockBasedTableOptions();
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new_bbto->~BlockBasedTableOptions();
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delete[] bbto_ptr;
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delete[] new_bbto_ptr;
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}
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// If the test fails, likely a new option is added to DBOptions
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// but it cannot be set through GetDBOptionsFromString(), or the test is not
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// updated accordingly.
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// After adding an option, we need to make sure it is settable by
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// GetDBOptionsFromString() and add the option to the input string passed to
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// DBOptionsFromString()in this test.
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// If it is a complicated type, you also need to add the field to
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// kDBOptionsBlacklist, and maybe add customized verification for it.
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TEST_F(OptionsSettableTest, DBOptionsAllFieldsSettable) {
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const OffsetGap kDBOptionsBlacklist = {
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{offsetof(struct DBOptions, env), sizeof(Env*)},
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{offsetof(struct DBOptions, rate_limiter),
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sizeof(std::shared_ptr<RateLimiter>)},
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{offsetof(struct DBOptions, sst_file_manager),
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sizeof(std::shared_ptr<SstFileManager>)},
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{offsetof(struct DBOptions, info_log), sizeof(std::shared_ptr<Logger>)},
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{offsetof(struct DBOptions, statistics),
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sizeof(std::shared_ptr<Statistics>)},
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{offsetof(struct DBOptions, db_paths), sizeof(std::vector<DbPath>)},
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{offsetof(struct DBOptions, db_log_dir), sizeof(std::string)},
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{offsetof(struct DBOptions, wal_dir), sizeof(std::string)},
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{offsetof(struct DBOptions, write_buffer_manager),
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sizeof(std::shared_ptr<WriteBufferManager>)},
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{offsetof(struct DBOptions, listeners),
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sizeof(std::vector<std::shared_ptr<EventListener>>)},
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{offsetof(struct DBOptions, row_cache), sizeof(std::shared_ptr<Cache>)},
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{offsetof(struct DBOptions, wal_filter), sizeof(const WalFilter*)},
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};
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char* options_ptr = new char[sizeof(DBOptions)];
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// Count padding bytes by setting all bytes in the memory to a special char,
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// copy a well constructed struct to this memory and see how many special
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// bytes left.
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DBOptions* options = new (options_ptr) DBOptions();
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FillWithSpecialChar(options_ptr, sizeof(DBOptions), kDBOptionsBlacklist);
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// It based on the behavior of compiler that padding bytes are not changed
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// when copying the struct. It's prone to failure when compiler behavior
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// changes. We verify there is unset bytes to detect the case.
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*options = DBOptions();
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int unset_bytes_base =
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NumUnsetBytes(options_ptr, sizeof(DBOptions), kDBOptionsBlacklist);
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ASSERT_GT(unset_bytes_base, 0);
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options->~DBOptions();
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options = new (options_ptr) DBOptions();
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FillWithSpecialChar(options_ptr, sizeof(DBOptions), kDBOptionsBlacklist);
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char* new_options_ptr = new char[sizeof(DBOptions)];
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DBOptions* new_options = new (new_options_ptr) DBOptions();
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FillWithSpecialChar(new_options_ptr, sizeof(DBOptions), kDBOptionsBlacklist);
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// Need to update the option string if a new option is added.
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ASSERT_OK(
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GetDBOptionsFromString(*options,
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"wal_bytes_per_sync=4295048118;"
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"delete_obsolete_files_period_micros=4294967758;"
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"WAL_ttl_seconds=4295008036;"
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"WAL_size_limit_MB=4295036161;"
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"wal_dir=path/to/wal_dir;"
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"db_write_buffer_size=2587;"
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"max_subcompactions=64330;"
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"table_cache_numshardbits=28;"
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"max_open_files=72;"
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"max_file_opening_threads=35;"
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"max_background_jobs=8;"
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"base_background_compactions=3;"
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"max_background_compactions=33;"
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"use_fsync=true;"
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"use_adaptive_mutex=false;"
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"max_total_wal_size=4295005604;"
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"compaction_readahead_size=0;"
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"new_table_reader_for_compaction_inputs=false;"
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"keep_log_file_num=4890;"
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"skip_stats_update_on_db_open=false;"
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"max_manifest_file_size=4295009941;"
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"db_log_dir=path/to/db_log_dir;"
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"skip_log_error_on_recovery=true;"
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"writable_file_max_buffer_size=1048576;"
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"paranoid_checks=true;"
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"is_fd_close_on_exec=false;"
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"bytes_per_sync=4295013613;"
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"enable_thread_tracking=false;"
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"recycle_log_file_num=0;"
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"create_missing_column_families=true;"
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"log_file_time_to_roll=3097;"
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"max_background_flushes=35;"
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"create_if_missing=false;"
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"error_if_exists=true;"
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"delayed_write_rate=4294976214;"
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"manifest_preallocation_size=1222;"
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"allow_mmap_writes=false;"
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"stats_dump_period_sec=70127;"
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"allow_fallocate=true;"
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"allow_mmap_reads=false;"
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"use_direct_reads=false;"
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"use_direct_io_for_flush_and_compaction=false;"
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"max_log_file_size=4607;"
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"random_access_max_buffer_size=1048576;"
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"advise_random_on_open=true;"
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"fail_if_options_file_error=false;"
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"enable_pipelined_write=false;"
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"allow_concurrent_memtable_write=true;"
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"wal_recovery_mode=kPointInTimeRecovery;"
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"enable_write_thread_adaptive_yield=true;"
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"write_thread_slow_yield_usec=5;"
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"write_thread_max_yield_usec=1000;"
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"access_hint_on_compaction_start=NONE;"
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"info_log_level=DEBUG_LEVEL;"
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"dump_malloc_stats=false;"
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"allow_2pc=false;"
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"avoid_flush_during_recovery=false;"
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"avoid_flush_during_shutdown=false;"
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"allow_ingest_behind=false;"
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"preserve_deletes=false;"
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"concurrent_prepare=false;"
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"two_write_queues=false;"
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"manual_wal_flush=false;"
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"seq_per_batch=false;",
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new_options));
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ASSERT_EQ(unset_bytes_base, NumUnsetBytes(new_options_ptr, sizeof(DBOptions),
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kDBOptionsBlacklist));
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options->~DBOptions();
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new_options->~DBOptions();
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delete[] options_ptr;
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delete[] new_options_ptr;
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}
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template <typename T1, typename T2>
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inline int offset_of(T1 T2::*member) {
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static T2 obj;
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return int(size_t(&(obj.*member)) - size_t(&obj));
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}
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// If the test fails, likely a new option is added to ColumnFamilyOptions
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// but it cannot be set through GetColumnFamilyOptionsFromString(), or the
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// test is not updated accordingly.
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// After adding an option, we need to make sure it is settable by
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// GetColumnFamilyOptionsFromString() and add the option to the input
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// string passed to GetColumnFamilyOptionsFromString()in this test.
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// If it is a complicated type, you also need to add the field to
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// kColumnFamilyOptionsBlacklist, and maybe add customized verification
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// for it.
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TEST_F(OptionsSettableTest, ColumnFamilyOptionsAllFieldsSettable) {
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// options in the blacklist need to appear in the same order as in
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// ColumnFamilyOptions.
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const OffsetGap kColumnFamilyOptionsBlacklist = {
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{offset_of(&ColumnFamilyOptions::inplace_callback),
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sizeof(UpdateStatus(*)(char*, uint32_t*, Slice, std::string*))},
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{offset_of(
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&ColumnFamilyOptions::memtable_insert_with_hint_prefix_extractor),
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sizeof(std::shared_ptr<const SliceTransform>)},
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{offset_of(&ColumnFamilyOptions::compression_per_level),
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sizeof(std::vector<CompressionType>)},
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{offset_of(
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&ColumnFamilyOptions::max_bytes_for_level_multiplier_additional),
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sizeof(std::vector<int>)},
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{offset_of(&ColumnFamilyOptions::memtable_factory),
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sizeof(std::shared_ptr<MemTableRepFactory>)},
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{offset_of(&ColumnFamilyOptions::table_properties_collector_factories),
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sizeof(ColumnFamilyOptions::TablePropertiesCollectorFactories)},
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{offset_of(&ColumnFamilyOptions::comparator), sizeof(Comparator*)},
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{offset_of(&ColumnFamilyOptions::merge_operator),
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sizeof(std::shared_ptr<MergeOperator>)},
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{offset_of(&ColumnFamilyOptions::compaction_filter),
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sizeof(const CompactionFilter*)},
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{offset_of(&ColumnFamilyOptions::compaction_filter_factory),
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sizeof(std::shared_ptr<CompactionFilterFactory>)},
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{offset_of(&ColumnFamilyOptions::prefix_extractor),
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sizeof(std::shared_ptr<const SliceTransform>)},
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{offset_of(&ColumnFamilyOptions::table_factory),
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sizeof(std::shared_ptr<TableFactory>)},
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{offset_of(&ColumnFamilyOptions::cf_paths),
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sizeof(std::vector<DbPath>)},
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};
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char* options_ptr = new char[sizeof(ColumnFamilyOptions)];
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// Count padding bytes by setting all bytes in the memory to a special char,
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// copy a well constructed struct to this memory and see how many special
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// bytes left.
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ColumnFamilyOptions* options = new (options_ptr) ColumnFamilyOptions();
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FillWithSpecialChar(options_ptr, sizeof(ColumnFamilyOptions),
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kColumnFamilyOptionsBlacklist);
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// It based on the behavior of compiler that padding bytes are not changed
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// when copying the struct. It's prone to failure when compiler behavior
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// changes. We verify there is unset bytes to detect the case.
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*options = ColumnFamilyOptions();
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// Deprecatd option which is not initialized. Need to set it to avoid
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// Valgrind error
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options->max_mem_compaction_level = 0;
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int unset_bytes_base = NumUnsetBytes(options_ptr, sizeof(ColumnFamilyOptions),
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kColumnFamilyOptionsBlacklist);
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ASSERT_GT(unset_bytes_base, 0);
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options->~ColumnFamilyOptions();
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options = new (options_ptr) ColumnFamilyOptions();
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FillWithSpecialChar(options_ptr, sizeof(ColumnFamilyOptions),
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kColumnFamilyOptionsBlacklist);
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// Following options are not settable through
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// GetColumnFamilyOptionsFromString():
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options->rate_limit_delay_max_milliseconds = 33;
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options->compaction_options_universal = CompactionOptionsUniversal();
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options->compression_opts = CompressionOptions();
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options->bottommost_compression_opts = CompressionOptions();
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options->hard_rate_limit = 0;
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options->soft_rate_limit = 0;
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options->purge_redundant_kvs_while_flush = false;
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options->max_mem_compaction_level = 0;
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char* new_options_ptr = new char[sizeof(ColumnFamilyOptions)];
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ColumnFamilyOptions* new_options =
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new (new_options_ptr) ColumnFamilyOptions();
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FillWithSpecialChar(new_options_ptr, sizeof(ColumnFamilyOptions),
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kColumnFamilyOptionsBlacklist);
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// Need to update the option string if a new option is added.
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ASSERT_OK(GetColumnFamilyOptionsFromString(
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*options,
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"compaction_filter_factory=mpudlojcujCompactionFilterFactory;"
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"table_factory=PlainTable;"
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"prefix_extractor=rocksdb.CappedPrefix.13;"
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"comparator=leveldb.BytewiseComparator;"
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"compression_per_level=kBZip2Compression:kBZip2Compression:"
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"kBZip2Compression:kNoCompression:kZlibCompression:kBZip2Compression:"
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"kSnappyCompression;"
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"max_bytes_for_level_base=986;"
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"bloom_locality=8016;"
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"target_file_size_base=4294976376;"
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"memtable_huge_page_size=2557;"
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"max_successive_merges=5497;"
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"max_sequential_skip_in_iterations=4294971408;"
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"arena_block_size=1893;"
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"target_file_size_multiplier=35;"
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"min_write_buffer_number_to_merge=9;"
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"max_write_buffer_number=84;"
|
|
"write_buffer_size=1653;"
|
|
"max_compaction_bytes=64;"
|
|
"max_bytes_for_level_multiplier=60;"
|
|
"memtable_factory=SkipListFactory;"
|
|
"compression=kNoCompression;"
|
|
"bottommost_compression=kDisableCompressionOption;"
|
|
"level0_stop_writes_trigger=33;"
|
|
"num_levels=99;"
|
|
"level0_slowdown_writes_trigger=22;"
|
|
"level0_file_num_compaction_trigger=14;"
|
|
"compaction_filter=urxcqstuwnCompactionFilter;"
|
|
"soft_rate_limit=530.615385;"
|
|
"soft_pending_compaction_bytes_limit=0;"
|
|
"max_write_buffer_number_to_maintain=84;"
|
|
"merge_operator=aabcxehazrMergeOperator;"
|
|
"memtable_prefix_bloom_size_ratio=0.4642;"
|
|
"memtable_insert_with_hint_prefix_extractor=rocksdb.CappedPrefix.13;"
|
|
"paranoid_file_checks=true;"
|
|
"force_consistency_checks=true;"
|
|
"inplace_update_num_locks=7429;"
|
|
"optimize_filters_for_hits=false;"
|
|
"level_compaction_dynamic_level_bytes=false;"
|
|
"inplace_update_support=false;"
|
|
"compaction_style=kCompactionStyleFIFO;"
|
|
"compaction_pri=kMinOverlappingRatio;"
|
|
"hard_pending_compaction_bytes_limit=0;"
|
|
"disable_auto_compactions=false;"
|
|
"report_bg_io_stats=true;"
|
|
"ttl=60;"
|
|
"compaction_options_fifo={max_table_files_size=3;ttl=100;allow_"
|
|
"compaction=false;};",
|
|
new_options));
|
|
|
|
ASSERT_EQ(unset_bytes_base,
|
|
NumUnsetBytes(new_options_ptr, sizeof(ColumnFamilyOptions),
|
|
kColumnFamilyOptionsBlacklist));
|
|
|
|
options->~ColumnFamilyOptions();
|
|
new_options->~ColumnFamilyOptions();
|
|
|
|
delete[] options_ptr;
|
|
delete[] new_options_ptr;
|
|
}
|
|
#endif // !__clang__
|
|
#endif // OS_LINUX || OS_WIN
|
|
#endif // !ROCKSDB_LITE
|
|
|
|
} // namespace rocksdb
|
|
|
|
int main(int argc, char** argv) {
|
|
::testing::InitGoogleTest(&argc, argv);
|
|
#ifdef GFLAGS
|
|
ParseCommandLineFlags(&argc, &argv, true);
|
|
#endif // GFLAGS
|
|
return RUN_ALL_TESTS();
|
|
}
|