fbda25f57a
Summary: In the current db_stress, all the keys are generated randomly and follows the uniform distribution. In order to test some corner cases that some key are always updated or read, we need to generate the key based on other distributions. In this PR, the key is generated based on Zipfian distribution and the skewness can be controlled by setting hot_key_alpha (0.8 to 1.5 is suggested). The larger hot_key_alpha is, the more skewed will be. Not that, usually, if hot_key_alpha is larger than 2, there might be only 1 or 2 keys that are generated. If hot_key_alpha is 0, it generate the key follows uniform distribution (random key) Testing plan: pass the db_stress and printed the keys to make sure it follows the distribution. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6163 Differential Revision: D18978480 Pulled By: zhichao-cao fbshipit-source-id: e123b4865477f7478e83fb581f9576bada334680
564 lines
24 KiB
C++
564 lines
24 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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#ifdef GFLAGS
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#include "db_stress_tool/db_stress_common.h"
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static bool ValidateUint32Range(const char* flagname, uint64_t value) {
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if (value > std::numeric_limits<uint32_t>::max()) {
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fprintf(stderr, "Invalid value for --%s: %lu, overflow\n", flagname,
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(unsigned long)value);
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return false;
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}
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return true;
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}
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DEFINE_uint64(seed, 2341234, "Seed for PRNG");
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static const bool FLAGS_seed_dummy __attribute__((__unused__)) =
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RegisterFlagValidator(&FLAGS_seed, &ValidateUint32Range);
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DEFINE_bool(read_only, false, "True if open DB in read-only mode during tests");
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DEFINE_int64(max_key, 1 * KB * KB,
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"Max number of key/values to place in database");
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DEFINE_int32(column_families, 10, "Number of column families");
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DEFINE_double(
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hot_key_alpha, 0,
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"Use Zipfian distribution to generate the key "
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"distribution. If it is not specified, write path will use random "
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"distribution to generate the keys. The parameter is [0, double_max]). "
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"However, the larger alpha is, the more shewed will be. If alpha is "
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"larger than 2, it is likely that only 1 key will be accessed. The "
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"Recommended value is [0.8-1.5]. The distribution is also related to "
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"max_key and total iterations of generating the hot key. ");
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DEFINE_string(
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options_file, "",
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"The path to a RocksDB options file. If specified, then db_stress will "
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"run with the RocksDB options in the default column family of the "
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"specified options file. Note that, when an options file is provided, "
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"db_stress will ignore the flag values for all options that may be passed "
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"via options file.");
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DEFINE_int64(
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active_width, 0,
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"Number of keys in active span of the key-range at any given time. The "
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"span begins with its left endpoint at key 0, gradually moves rightwards, "
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"and ends with its right endpoint at max_key. If set to 0, active_width "
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"will be sanitized to be equal to max_key.");
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// TODO(noetzli) Add support for single deletes
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DEFINE_bool(test_batches_snapshots, false,
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"If set, the test uses MultiGet(), MultiPut() and MultiDelete()"
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" which read/write/delete multiple keys in a batch. In this mode,"
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" we do not verify db content by comparing the content with the "
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"pre-allocated array. Instead, we do partial verification inside"
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" MultiGet() by checking various values in a batch. Benefit of"
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" this mode:\n"
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"\t(a) No need to acquire mutexes during writes (less cache "
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"flushes in multi-core leading to speed up)\n"
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"\t(b) No long validation at the end (more speed up)\n"
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"\t(c) Test snapshot and atomicity of batch writes");
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DEFINE_bool(atomic_flush, false,
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"If set, enables atomic flush in the options.\n");
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DEFINE_bool(test_cf_consistency, false,
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"If set, runs the stress test dedicated to verifying writes to "
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"multiple column families are consistent. Setting this implies "
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"`atomic_flush=true` is set true if `disable_wal=false`.\n");
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DEFINE_int32(threads, 32, "Number of concurrent threads to run.");
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DEFINE_int32(ttl, -1,
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"Opens the db with this ttl value if this is not -1. "
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"Carefully specify a large value such that verifications on "
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"deleted values don't fail");
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DEFINE_int32(value_size_mult, 8,
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"Size of value will be this number times rand_int(1,3) bytes");
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DEFINE_int32(compaction_readahead_size, 0, "Compaction readahead size");
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DEFINE_bool(enable_pipelined_write, false, "Pipeline WAL/memtable writes");
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DEFINE_bool(verify_before_write, false, "Verify before write");
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DEFINE_bool(histogram, false, "Print histogram of operation timings");
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DEFINE_bool(destroy_db_initially, true,
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"Destroys the database dir before start if this is true");
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DEFINE_bool(verbose, false, "Verbose");
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DEFINE_bool(progress_reports, true,
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"If true, db_stress will report number of finished operations");
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DEFINE_uint64(db_write_buffer_size, rocksdb::Options().db_write_buffer_size,
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"Number of bytes to buffer in all memtables before compacting");
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DEFINE_int32(write_buffer_size,
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static_cast<int32_t>(rocksdb::Options().write_buffer_size),
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"Number of bytes to buffer in memtable before compacting");
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DEFINE_int32(max_write_buffer_number,
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rocksdb::Options().max_write_buffer_number,
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"The number of in-memory memtables. "
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"Each memtable is of size FLAGS_write_buffer_size.");
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DEFINE_int32(min_write_buffer_number_to_merge,
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rocksdb::Options().min_write_buffer_number_to_merge,
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"The minimum number of write buffers that will be merged together "
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"before writing to storage. This is cheap because it is an "
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"in-memory merge. If this feature is not enabled, then all these "
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"write buffers are flushed to L0 as separate files and this "
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"increases read amplification because a get request has to check "
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"in all of these files. Also, an in-memory merge may result in "
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"writing less data to storage if there are duplicate records in"
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" each of these individual write buffers.");
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DEFINE_int32(max_write_buffer_number_to_maintain,
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rocksdb::Options().max_write_buffer_number_to_maintain,
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"The total maximum number of write buffers to maintain in memory "
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"including copies of buffers that have already been flushed. "
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"Unlike max_write_buffer_number, this parameter does not affect "
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"flushing. This controls the minimum amount of write history "
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"that will be available in memory for conflict checking when "
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"Transactions are used. If this value is too low, some "
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"transactions may fail at commit time due to not being able to "
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"determine whether there were any write conflicts. Setting this "
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"value to 0 will cause write buffers to be freed immediately "
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"after they are flushed. If this value is set to -1, "
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"'max_write_buffer_number' will be used.");
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DEFINE_int64(max_write_buffer_size_to_maintain,
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rocksdb::Options().max_write_buffer_size_to_maintain,
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"The total maximum size of write buffers to maintain in memory "
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"including copies of buffers that have already been flushed. "
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"Unlike max_write_buffer_number, this parameter does not affect "
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"flushing. This controls the minimum amount of write history "
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"that will be available in memory for conflict checking when "
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"Transactions are used. If this value is too low, some "
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"transactions may fail at commit time due to not being able to "
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"determine whether there were any write conflicts. Setting this "
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"value to 0 will cause write buffers to be freed immediately "
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"after they are flushed. If this value is set to -1, "
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"'max_write_buffer_number' will be used.");
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DEFINE_double(memtable_prefix_bloom_size_ratio,
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rocksdb::Options().memtable_prefix_bloom_size_ratio,
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"creates prefix blooms for memtables, each with size "
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"`write_buffer_size * memtable_prefix_bloom_size_ratio`.");
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DEFINE_bool(memtable_whole_key_filtering,
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rocksdb::Options().memtable_whole_key_filtering,
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"Enable whole key filtering in memtables.");
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DEFINE_int32(open_files, rocksdb::Options().max_open_files,
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"Maximum number of files to keep open at the same time "
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"(use default if == 0)");
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DEFINE_int64(compressed_cache_size, -1,
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"Number of bytes to use as a cache of compressed data."
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" Negative means use default settings.");
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DEFINE_int32(compaction_style, rocksdb::Options().compaction_style, "");
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DEFINE_int32(level0_file_num_compaction_trigger,
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rocksdb::Options().level0_file_num_compaction_trigger,
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"Level0 compaction start trigger");
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DEFINE_int32(level0_slowdown_writes_trigger,
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rocksdb::Options().level0_slowdown_writes_trigger,
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"Number of files in level-0 that will slow down writes");
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DEFINE_int32(level0_stop_writes_trigger,
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rocksdb::Options().level0_stop_writes_trigger,
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"Number of files in level-0 that will trigger put stop.");
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DEFINE_int32(block_size,
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static_cast<int32_t>(rocksdb::BlockBasedTableOptions().block_size),
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"Number of bytes in a block.");
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DEFINE_int32(
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format_version,
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static_cast<int32_t>(rocksdb::BlockBasedTableOptions().format_version),
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"Format version of SST files.");
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DEFINE_int32(index_block_restart_interval,
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rocksdb::BlockBasedTableOptions().index_block_restart_interval,
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"Number of keys between restart points "
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"for delta encoding of keys in index block.");
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DEFINE_int32(max_background_compactions,
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rocksdb::Options().max_background_compactions,
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"The maximum number of concurrent background compactions "
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"that can occur in parallel.");
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DEFINE_int32(num_bottom_pri_threads, 0,
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"The number of threads in the bottom-priority thread pool (used "
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"by universal compaction only).");
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DEFINE_int32(compaction_thread_pool_adjust_interval, 0,
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"The interval (in milliseconds) to adjust compaction thread pool "
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"size. Don't change it periodically if the value is 0.");
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DEFINE_int32(compaction_thread_pool_variations, 2,
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"Range of background thread pool size variations when adjusted "
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"periodically.");
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DEFINE_int32(max_background_flushes, rocksdb::Options().max_background_flushes,
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"The maximum number of concurrent background flushes "
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"that can occur in parallel.");
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DEFINE_int32(universal_size_ratio, 0,
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"The ratio of file sizes that trigger"
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" compaction in universal style");
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DEFINE_int32(universal_min_merge_width, 0,
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"The minimum number of files to "
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"compact in universal style compaction");
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DEFINE_int32(universal_max_merge_width, 0,
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"The max number of files to compact"
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" in universal style compaction");
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DEFINE_int32(universal_max_size_amplification_percent, 0,
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"The max size amplification for universal style compaction");
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DEFINE_int32(clear_column_family_one_in, 1000000,
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"With a chance of 1/N, delete a column family and then recreate "
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"it again. If N == 0, never drop/create column families. "
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"When test_batches_snapshots is true, this flag has no effect");
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DEFINE_int32(set_options_one_in, 0,
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"With a chance of 1/N, change some random options");
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DEFINE_int32(set_in_place_one_in, 0,
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"With a chance of 1/N, toggle in place support option");
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DEFINE_int64(cache_size, 2LL * KB * KB * KB,
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"Number of bytes to use as a cache of uncompressed data.");
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DEFINE_bool(cache_index_and_filter_blocks, false,
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"True if indexes/filters should be cached in block cache.");
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DEFINE_bool(use_clock_cache, false,
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"Replace default LRU block cache with clock cache.");
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DEFINE_uint64(subcompactions, 1,
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"Maximum number of subcompactions to divide L0-L1 compactions "
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"into.");
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DEFINE_uint64(periodic_compaction_seconds, 1000,
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"Files older than this value will be picked up for compaction.");
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DEFINE_uint64(compaction_ttl, 1000,
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"Files older than TTL will be compacted to the next level.");
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DEFINE_bool(allow_concurrent_memtable_write, false,
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"Allow multi-writers to update mem tables in parallel.");
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DEFINE_bool(enable_write_thread_adaptive_yield, true,
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"Use a yielding spin loop for brief writer thread waits.");
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static const bool FLAGS_subcompactions_dummy __attribute__((__unused__)) =
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RegisterFlagValidator(&FLAGS_subcompactions, &ValidateUint32Range);
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static bool ValidateInt32Positive(const char* flagname, int32_t value) {
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if (value < 0) {
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fprintf(stderr, "Invalid value for --%s: %d, must be >=0\n", flagname,
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value);
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return false;
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}
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return true;
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}
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DEFINE_int32(reopen, 10, "Number of times database reopens");
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static const bool FLAGS_reopen_dummy __attribute__((__unused__)) =
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RegisterFlagValidator(&FLAGS_reopen, &ValidateInt32Positive);
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DEFINE_double(bloom_bits, 10,
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"Bloom filter bits per key. "
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"Negative means use default settings.");
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DEFINE_bool(use_block_based_filter, false,
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"use block based filter"
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"instead of full filter for block based table");
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DEFINE_bool(partition_filters, false,
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"use partitioned filters "
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"for block-based table");
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DEFINE_int32(
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index_type,
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static_cast<int32_t>(rocksdb::BlockBasedTableOptions::kBinarySearch),
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"Type of block-based table index (see `enum IndexType` in table.h)");
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DEFINE_string(db, "", "Use the db with the following name.");
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DEFINE_string(secondaries_base, "",
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"Use this path as the base path for secondary instances.");
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DEFINE_bool(enable_secondary, false, "Enable secondary instance.");
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DEFINE_string(
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expected_values_path, "",
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"File where the array of expected uint32_t values will be stored. If "
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"provided and non-empty, the DB state will be verified against these "
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"values after recovery. --max_key and --column_family must be kept the "
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"same across invocations of this program that use the same "
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"--expected_values_path.");
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DEFINE_bool(verify_checksum, false,
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"Verify checksum for every block read from storage");
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DEFINE_bool(mmap_read, rocksdb::Options().allow_mmap_reads,
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"Allow reads to occur via mmap-ing files");
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DEFINE_bool(mmap_write, rocksdb::Options().allow_mmap_writes,
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"Allow writes to occur via mmap-ing files");
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DEFINE_bool(use_direct_reads, rocksdb::Options().use_direct_reads,
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"Use O_DIRECT for reading data");
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DEFINE_bool(use_direct_io_for_flush_and_compaction,
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rocksdb::Options().use_direct_io_for_flush_and_compaction,
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"Use O_DIRECT for writing data");
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DEFINE_bool(statistics, false, "Create database statistics");
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DEFINE_bool(sync, false, "Sync all writes to disk");
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DEFINE_bool(use_fsync, false, "If true, issue fsync instead of fdatasync");
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DEFINE_int32(kill_random_test, 0,
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"If non-zero, kill at various points in source code with "
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"probability 1/this");
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static const bool FLAGS_kill_random_test_dummy __attribute__((__unused__)) =
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RegisterFlagValidator(&FLAGS_kill_random_test, &ValidateInt32Positive);
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extern int rocksdb_kill_odds;
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DEFINE_string(kill_prefix_blacklist, "",
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"If non-empty, kill points with prefix in the list given will be"
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" skipped. Items are comma-separated.");
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extern std::vector<std::string> rocksdb_kill_prefix_blacklist;
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DEFINE_bool(disable_wal, false, "If true, do not write WAL for write.");
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DEFINE_uint64(recycle_log_file_num, rocksdb::Options().recycle_log_file_num,
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"Number of old WAL files to keep around for later recycling");
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DEFINE_int64(target_file_size_base, rocksdb::Options().target_file_size_base,
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"Target level-1 file size for compaction");
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DEFINE_int32(target_file_size_multiplier, 1,
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"A multiplier to compute target level-N file size (N >= 2)");
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DEFINE_uint64(max_bytes_for_level_base,
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rocksdb::Options().max_bytes_for_level_base,
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"Max bytes for level-1");
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DEFINE_double(max_bytes_for_level_multiplier, 2,
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"A multiplier to compute max bytes for level-N (N >= 2)");
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DEFINE_int32(range_deletion_width, 10,
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"The width of the range deletion intervals.");
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DEFINE_uint64(rate_limiter_bytes_per_sec, 0, "Set options.rate_limiter value.");
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DEFINE_bool(rate_limit_bg_reads, false,
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"Use options.rate_limiter on compaction reads");
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DEFINE_bool(use_txn, false,
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"Use TransactionDB. Currently the default write policy is "
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"TxnDBWritePolicy::WRITE_PREPARED");
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DEFINE_uint64(txn_write_policy, 0,
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"The transaction write policy. Default is "
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"TxnDBWritePolicy::WRITE_COMMITTED. Note that this should not be "
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"changed accross crashes.");
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DEFINE_bool(unordered_write, false,
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"Turn on the unordered_write feature. This options is currently "
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"tested only in combination with use_txn=true and "
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"txn_write_policy=TxnDBWritePolicy::WRITE_PREPARED.");
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DEFINE_int32(backup_one_in, 0,
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"If non-zero, then CreateNewBackup() will be called once for "
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"every N operations on average. 0 indicates CreateNewBackup() "
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"is disabled.");
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DEFINE_int32(checkpoint_one_in, 0,
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"If non-zero, then CreateCheckpoint() will be called once for "
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"every N operations on average. 0 indicates CreateCheckpoint() "
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"is disabled.");
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DEFINE_int32(ingest_external_file_one_in, 0,
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"If non-zero, then IngestExternalFile() will be called once for "
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"every N operations on average. 0 indicates IngestExternalFile() "
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"is disabled.");
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DEFINE_int32(ingest_external_file_width, 1000,
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"The width of the ingested external files.");
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DEFINE_int32(compact_files_one_in, 0,
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"If non-zero, then CompactFiles() will be called once for every N "
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"operations on average. 0 indicates CompactFiles() is disabled.");
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DEFINE_int32(compact_range_one_in, 0,
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"If non-zero, then CompactRange() will be called once for every N "
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"operations on average. 0 indicates CompactRange() is disabled.");
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DEFINE_int32(flush_one_in, 0,
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"If non-zero, then Flush() will be called once for every N ops "
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"on average. 0 indicates calls to Flush() are disabled.");
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DEFINE_int32(pause_background_one_in, 0,
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"If non-zero, then PauseBackgroundWork()+Continue will be called "
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"once for every N ops on average. 0 disables.");
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DEFINE_int32(compact_range_width, 10000,
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"The width of the ranges passed to CompactRange().");
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DEFINE_int32(acquire_snapshot_one_in, 0,
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"If non-zero, then acquires a snapshot once every N operations on "
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"average.");
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DEFINE_bool(compare_full_db_state_snapshot, false,
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"If set we compare state of entire db (in one of the threads) with"
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"each snapshot.");
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|
|
|
DEFINE_uint64(snapshot_hold_ops, 0,
|
|
"If non-zero, then releases snapshots N operations after they're "
|
|
"acquired.");
|
|
|
|
DEFINE_bool(long_running_snapshots, false,
|
|
"If set, hold on some some snapshots for much longer time.");
|
|
|
|
DEFINE_bool(use_multiget, false,
|
|
"If set, use the batched MultiGet API for reads");
|
|
|
|
static bool ValidateInt32Percent(const char* flagname, int32_t value) {
|
|
if (value < 0 || value > 100) {
|
|
fprintf(stderr, "Invalid value for --%s: %d, 0<= pct <=100 \n", flagname,
|
|
value);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
DEFINE_int32(readpercent, 10,
|
|
"Ratio of reads to total workload (expressed as a percentage)");
|
|
static const bool FLAGS_readpercent_dummy __attribute__((__unused__)) =
|
|
RegisterFlagValidator(&FLAGS_readpercent, &ValidateInt32Percent);
|
|
|
|
DEFINE_int32(prefixpercent, 20,
|
|
"Ratio of prefix iterators to total workload (expressed as a"
|
|
" percentage)");
|
|
static const bool FLAGS_prefixpercent_dummy __attribute__((__unused__)) =
|
|
RegisterFlagValidator(&FLAGS_prefixpercent, &ValidateInt32Percent);
|
|
|
|
DEFINE_int32(writepercent, 45,
|
|
"Ratio of writes to total workload (expressed as a percentage)");
|
|
static const bool FLAGS_writepercent_dummy __attribute__((__unused__)) =
|
|
RegisterFlagValidator(&FLAGS_writepercent, &ValidateInt32Percent);
|
|
|
|
DEFINE_int32(delpercent, 15,
|
|
"Ratio of deletes to total workload (expressed as a percentage)");
|
|
static const bool FLAGS_delpercent_dummy __attribute__((__unused__)) =
|
|
RegisterFlagValidator(&FLAGS_delpercent, &ValidateInt32Percent);
|
|
|
|
DEFINE_int32(delrangepercent, 0,
|
|
"Ratio of range deletions to total workload (expressed as a "
|
|
"percentage). Cannot be used with test_batches_snapshots");
|
|
static const bool FLAGS_delrangepercent_dummy __attribute__((__unused__)) =
|
|
RegisterFlagValidator(&FLAGS_delrangepercent, &ValidateInt32Percent);
|
|
|
|
DEFINE_int32(nooverwritepercent, 60,
|
|
"Ratio of keys without overwrite to total workload (expressed as "
|
|
" a percentage)");
|
|
static const bool FLAGS_nooverwritepercent_dummy __attribute__((__unused__)) =
|
|
RegisterFlagValidator(&FLAGS_nooverwritepercent, &ValidateInt32Percent);
|
|
|
|
DEFINE_int32(iterpercent, 10,
|
|
"Ratio of iterations to total workload"
|
|
" (expressed as a percentage)");
|
|
static const bool FLAGS_iterpercent_dummy __attribute__((__unused__)) =
|
|
RegisterFlagValidator(&FLAGS_iterpercent, &ValidateInt32Percent);
|
|
|
|
DEFINE_uint64(num_iterations, 10, "Number of iterations per MultiIterate run");
|
|
static const bool FLAGS_num_iterations_dummy __attribute__((__unused__)) =
|
|
RegisterFlagValidator(&FLAGS_num_iterations, &ValidateUint32Range);
|
|
|
|
DEFINE_string(compression_type, "snappy",
|
|
"Algorithm to use to compress the database");
|
|
|
|
DEFINE_int32(compression_max_dict_bytes, 0,
|
|
"Maximum size of dictionary used to prime the compression "
|
|
"library.");
|
|
|
|
DEFINE_int32(compression_zstd_max_train_bytes, 0,
|
|
"Maximum size of training data passed to zstd's dictionary "
|
|
"trainer.");
|
|
|
|
DEFINE_string(checksum_type, "kCRC32c", "Algorithm to use to checksum blocks");
|
|
|
|
DEFINE_string(hdfs, "", "Name of hdfs environment");
|
|
|
|
DEFINE_string(env_uri, "",
|
|
"URI for env lookup. Mutually exclusive with --hdfs");
|
|
|
|
DEFINE_uint64(ops_per_thread, 1200000, "Number of operations per thread.");
|
|
static const bool FLAGS_ops_per_thread_dummy __attribute__((__unused__)) =
|
|
RegisterFlagValidator(&FLAGS_ops_per_thread, &ValidateUint32Range);
|
|
|
|
DEFINE_uint64(log2_keys_per_lock, 2, "Log2 of number of keys per lock");
|
|
static const bool FLAGS_log2_keys_per_lock_dummy __attribute__((__unused__)) =
|
|
RegisterFlagValidator(&FLAGS_log2_keys_per_lock, &ValidateUint32Range);
|
|
|
|
DEFINE_uint64(max_manifest_file_size, 16384, "Maximum size of a MANIFEST file");
|
|
|
|
DEFINE_bool(in_place_update, false, "On true, does inplace update in memtable");
|
|
|
|
DEFINE_int32(secondary_catch_up_one_in, 0,
|
|
"If non-zero, the secondaries attemp to catch up with the primary "
|
|
"once for every N operations on average. 0 indicates the "
|
|
"secondaries do not try to catch up after open.");
|
|
|
|
DEFINE_string(memtablerep, "skip_list", "");
|
|
|
|
inline static bool ValidatePrefixSize(const char* flagname, int32_t value) {
|
|
if (value < -1 || value > 8) {
|
|
fprintf(stderr, "Invalid value for --%s: %d. -1 <= PrefixSize <= 8\n",
|
|
flagname, value);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
DEFINE_int32(prefix_size, 7,
|
|
"Control the prefix size for HashSkipListRep. "
|
|
"-1 is disabled.");
|
|
static const bool FLAGS_prefix_size_dummy __attribute__((__unused__)) =
|
|
RegisterFlagValidator(&FLAGS_prefix_size, &ValidatePrefixSize);
|
|
|
|
DEFINE_bool(use_merge, false,
|
|
"On true, replaces all writes with a Merge "
|
|
"that behaves like a Put");
|
|
|
|
DEFINE_bool(use_full_merge_v1, false,
|
|
"On true, use a merge operator that implement the deprecated "
|
|
"version of FullMerge");
|
|
|
|
DEFINE_int32(sync_wal_one_in, 0,
|
|
"If non-zero, then SyncWAL() will be called once for every N ops "
|
|
"on average. 0 indicates that calls to SyncWAL() are disabled.");
|
|
#endif // GFLAGS
|