rocksdb/util/options_helper.h

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// Copyright (c) 2014, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#pragma once
#include <string>
#include <stdexcept>
#include "rocksdb/options.h"
#include "rocksdb/status.h"
#include "util/mutable_cf_options.h"
RocksDB Options file format and its serialization / deserialization. Summary: This patch defines the format of RocksDB options file, which follows the INI file format, and implements functions for its serialization and deserialization. An example RocksDB options file can be found in examples/rocksdb_option_file_example.ini. A typical RocksDB options file has three sections, which are Version, DBOptions, and more than one CFOptions. The RocksDB options file in general follows the basic INI file format with the following extensions / modifications: * Escaped characters We escaped the following characters: - \n -- line feed - new line - \r -- carriage return - \\ -- backslash \ - \: -- colon symbol : - \# -- hash tag # * Comments We support # style comments. Comments can appear at the ending part of a line. * Statements A statement is of the form option_name = value. Each statement contains a '=', where extra white-spaces are supported. However, we don't support multi-lined statement. Furthermore, each line can only contain at most one statement. * Section Sections are of the form [SecitonTitle "SectionArgument"], where section argument is optional. * List We use colon-separated string to represent a list. For instance, n1:n2:n3:n4 is a list containing four values. Below is an example of a RocksDB options file: [Version] rocksdb_version=4.0.0 options_file_version=1.0 [DBOptions] max_open_files=12345 max_background_flushes=301 [CFOptions "default"] [CFOptions "the second column family"] [CFOptions "the third column family"] Test Plan: Added many tests in options_test.cc Reviewers: igor, IslamAbdelRahman, sdong, anthony Reviewed By: anthony Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D46059
2015-09-29 23:42:40 +02:00
#ifndef ROCKSDB_LITE
namespace rocksdb {
RocksDB Options file format and its serialization / deserialization. Summary: This patch defines the format of RocksDB options file, which follows the INI file format, and implements functions for its serialization and deserialization. An example RocksDB options file can be found in examples/rocksdb_option_file_example.ini. A typical RocksDB options file has three sections, which are Version, DBOptions, and more than one CFOptions. The RocksDB options file in general follows the basic INI file format with the following extensions / modifications: * Escaped characters We escaped the following characters: - \n -- line feed - new line - \r -- carriage return - \\ -- backslash \ - \: -- colon symbol : - \# -- hash tag # * Comments We support # style comments. Comments can appear at the ending part of a line. * Statements A statement is of the form option_name = value. Each statement contains a '=', where extra white-spaces are supported. However, we don't support multi-lined statement. Furthermore, each line can only contain at most one statement. * Section Sections are of the form [SecitonTitle "SectionArgument"], where section argument is optional. * List We use colon-separated string to represent a list. For instance, n1:n2:n3:n4 is a list containing four values. Below is an example of a RocksDB options file: [Version] rocksdb_version=4.0.0 options_file_version=1.0 [DBOptions] max_open_files=12345 max_background_flushes=301 [CFOptions "default"] [CFOptions "the second column family"] [CFOptions "the third column family"] Test Plan: Added many tests in options_test.cc Reviewers: igor, IslamAbdelRahman, sdong, anthony Reviewed By: anthony Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D46059
2015-09-29 23:42:40 +02:00
// Returns true if the input char "c" is considered as a special character
// that will be escaped when EscapeOptionString() is called.
//
// @param c the input char
// @return true if the input char "c" is considered as a special character.
// @see EscapeOptionString
bool isSpecialChar(const char c);
// If the input char is an escaped char, it will return the its
// associated raw-char. Otherwise, the function will simply return
// the original input char.
char UnescapeChar(const char c);
// If the input char is a control char, it will return the its
// associated escaped char. Otherwise, the function will simply return
// the original input char.
char EscapeChar(const char c);
// Converts a raw string to an escaped string. Escaped-characters are
// defined via the isSpecialChar() function. When a char in the input
// string "raw_string" is classified as a special characters, then it
// will be prefixed by '\' in the output.
//
// It's inverse function is UnescapeOptionString().
// @param raw_string the input string
// @return the '\' escaped string of the input "raw_string"
// @see isSpecialChar, UnescapeOptionString
std::string EscapeOptionString(const std::string& raw_string);
// The inverse function of EscapeOptionString. It converts
// an '\' escaped string back to a raw string.
//
// @param escaped_string the input '\' escaped string
// @return the raw string of the input "escaped_string"
std::string UnescapeOptionString(const std::string& escaped_string);
Status GetMutableOptionsFromStrings(
const MutableCFOptions& base_options,
const std::unordered_map<std::string, std::string>& options_map,
MutableCFOptions* new_options);
enum class OptionType {
kBoolean,
kInt,
kUInt,
kUInt32T,
kUInt64T,
kSizeT,
kString,
kDouble,
kCompactionStyle,
kSliceTransform,
kCompressionType,
kVectorCompressionType,
kTableFactory,
kComparator,
kCompactionFilter,
kCompactionFilterFactory,
kMergeOperator,
kMemTableRepFactory,
kUnknown
};
enum class OptionVerificationType {
kNormal,
kByName, // The option is pointer typed so we can only verify
// based on it's name.
kDeprecated // The option is no longer used in rocksdb. The RocksDB
// OptionsParser will still accept this option if it
// happen to exists in some Options file. However, the
// parser will not include it in serialization and
// verification processes.
};
// A struct for storing constant option information such as option name,
// option type, and offset.
struct OptionTypeInfo {
int offset;
OptionType type;
OptionVerificationType verification;
};
// A helper function that converts "opt_address" to a std::string
// based on the specified OptionType.
bool SerializeSingleOptionHelper(const char* opt_address,
const OptionType opt_type, std::string* value);
static std::unordered_map<std::string, OptionTypeInfo> db_options_type_info = {
/*
// not yet supported
AccessHint access_hint_on_compaction_start;
Env* env;
InfoLogLevel info_log_level;
WALRecoveryMode wal_recovery_mode;
std::shared_ptr<Cache> row_cache;
std::shared_ptr<DeleteScheduler> delete_scheduler;
std::shared_ptr<Logger> info_log;
std::shared_ptr<RateLimiter> rate_limiter;
std::shared_ptr<Statistics> statistics;
std::vector<DbPath> db_paths;
std::vector<std::shared_ptr<EventListener>> listeners;
*/
{"advise_random_on_open",
{offsetof(struct DBOptions, advise_random_on_open), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"allow_mmap_reads",
{offsetof(struct DBOptions, allow_mmap_reads), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"allow_fallocate",
{offsetof(struct DBOptions, allow_fallocate), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"allow_mmap_writes",
{offsetof(struct DBOptions, allow_mmap_writes), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"allow_os_buffer",
{offsetof(struct DBOptions, allow_os_buffer), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"create_if_missing",
{offsetof(struct DBOptions, create_if_missing), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"create_missing_column_families",
{offsetof(struct DBOptions, create_missing_column_families),
OptionType::kBoolean, OptionVerificationType::kNormal}},
{"disableDataSync",
{offsetof(struct DBOptions, disableDataSync), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"disable_data_sync", // for compatibility
{offsetof(struct DBOptions, disableDataSync), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"enable_thread_tracking",
{offsetof(struct DBOptions, enable_thread_tracking), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"error_if_exists",
{offsetof(struct DBOptions, error_if_exists), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"is_fd_close_on_exec",
{offsetof(struct DBOptions, is_fd_close_on_exec), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"paranoid_checks",
{offsetof(struct DBOptions, paranoid_checks), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"skip_log_error_on_recovery",
{offsetof(struct DBOptions, skip_log_error_on_recovery),
OptionType::kBoolean, OptionVerificationType::kNormal}},
{"skip_stats_update_on_db_open",
{offsetof(struct DBOptions, skip_stats_update_on_db_open),
OptionType::kBoolean, OptionVerificationType::kNormal}},
{"new_table_reader_for_compaction_inputs",
{offsetof(struct DBOptions, new_table_reader_for_compaction_inputs),
OptionType::kBoolean, OptionVerificationType::kNormal}},
{"compaction_readahead_size",
{offsetof(struct DBOptions, compaction_readahead_size), OptionType::kSizeT,
OptionVerificationType::kNormal}},
{"use_adaptive_mutex",
{offsetof(struct DBOptions, use_adaptive_mutex), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"use_fsync",
{offsetof(struct DBOptions, use_fsync), OptionType::kBoolean,
OptionVerificationType::kNormal}},
{"max_background_compactions",
{offsetof(struct DBOptions, max_background_compactions), OptionType::kInt,
OptionVerificationType::kNormal}},
{"max_background_flushes",
{offsetof(struct DBOptions, max_background_flushes), OptionType::kInt,
OptionVerificationType::kNormal}},
{"max_file_opening_threads",
{offsetof(struct DBOptions, max_file_opening_threads), OptionType::kInt,
OptionVerificationType::kNormal}},
{"max_open_files",
{offsetof(struct DBOptions, max_open_files), OptionType::kInt,
OptionVerificationType::kNormal}},
{"table_cache_numshardbits",
{offsetof(struct DBOptions, table_cache_numshardbits), OptionType::kInt,
OptionVerificationType::kNormal}},
{"db_write_buffer_size",
{offsetof(struct DBOptions, db_write_buffer_size), OptionType::kSizeT,
OptionVerificationType::kNormal}},
{"keep_log_file_num",
{offsetof(struct DBOptions, keep_log_file_num), OptionType::kSizeT,
OptionVerificationType::kNormal}},
{"log_file_time_to_roll",
{offsetof(struct DBOptions, log_file_time_to_roll), OptionType::kSizeT,
OptionVerificationType::kNormal}},
{"manifest_preallocation_size",
{offsetof(struct DBOptions, manifest_preallocation_size),
OptionType::kSizeT, OptionVerificationType::kNormal}},
{"max_log_file_size",
{offsetof(struct DBOptions, max_log_file_size), OptionType::kSizeT,
OptionVerificationType::kNormal}},
{"db_log_dir",
{offsetof(struct DBOptions, db_log_dir), OptionType::kString,
OptionVerificationType::kNormal}},
{"wal_dir",
{offsetof(struct DBOptions, wal_dir), OptionType::kString,
OptionVerificationType::kNormal}},
{"max_subcompactions",
{offsetof(struct DBOptions, max_subcompactions), OptionType::kUInt32T,
OptionVerificationType::kNormal}},
{"WAL_size_limit_MB",
{offsetof(struct DBOptions, WAL_size_limit_MB), OptionType::kUInt64T,
OptionVerificationType::kNormal}},
{"WAL_ttl_seconds",
{offsetof(struct DBOptions, WAL_ttl_seconds), OptionType::kUInt64T,
OptionVerificationType::kNormal}},
{"bytes_per_sync",
{offsetof(struct DBOptions, bytes_per_sync), OptionType::kUInt64T,
OptionVerificationType::kNormal}},
{"delayed_write_rate",
{offsetof(struct DBOptions, delayed_write_rate), OptionType::kUInt64T,
OptionVerificationType::kNormal}},
{"delete_obsolete_files_period_micros",
{offsetof(struct DBOptions, delete_obsolete_files_period_micros),
OptionType::kUInt64T, OptionVerificationType::kNormal}},
{"max_manifest_file_size",
{offsetof(struct DBOptions, max_manifest_file_size), OptionType::kUInt64T,
OptionVerificationType::kNormal}},
{"max_total_wal_size",
{offsetof(struct DBOptions, max_total_wal_size), OptionType::kUInt64T,
OptionVerificationType::kNormal}},
{"wal_bytes_per_sync",
{offsetof(struct DBOptions, wal_bytes_per_sync), OptionType::kUInt64T,
OptionVerificationType::kNormal}},
{"stats_dump_period_sec",
{offsetof(struct DBOptions, stats_dump_period_sec), OptionType::kUInt,
OptionVerificationType::kNormal}}};
static std::unordered_map<std::string, OptionTypeInfo> cf_options_type_info = {
/* not yet supported
CompactionOptionsFIFO compaction_options_fifo;
CompactionOptionsUniversal compaction_options_universal;
CompressionOptions compression_opts;
TablePropertiesCollectorFactories table_properties_collector_factories;
typedef std::vector<std::shared_ptr<TablePropertiesCollectorFactory>>
TablePropertiesCollectorFactories;
UpdateStatus (*inplace_callback)(char* existing_value,
uint34_t* existing_value_size,
Slice delta_value,
std::string* merged_value);
std::vector<int> max_bytes_for_level_multiplier_additional;
*/
{"compaction_measure_io_stats",
{offsetof(struct ColumnFamilyOptions, compaction_measure_io_stats),
OptionType::kBoolean, OptionVerificationType::kNormal}},
{"disable_auto_compactions",
{offsetof(struct ColumnFamilyOptions, disable_auto_compactions),
OptionType::kBoolean, OptionVerificationType::kNormal}},
{"filter_deletes",
{offsetof(struct ColumnFamilyOptions, filter_deletes),
OptionType::kBoolean, OptionVerificationType::kNormal}},
{"inplace_update_support",
{offsetof(struct ColumnFamilyOptions, inplace_update_support),
OptionType::kBoolean, OptionVerificationType::kNormal}},
{"level_compaction_dynamic_level_bytes",
{offsetof(struct ColumnFamilyOptions,
level_compaction_dynamic_level_bytes),
OptionType::kBoolean, OptionVerificationType::kNormal}},
{"optimize_filters_for_hits",
{offsetof(struct ColumnFamilyOptions, optimize_filters_for_hits),
OptionType::kBoolean, OptionVerificationType::kNormal}},
{"paranoid_file_checks",
{offsetof(struct ColumnFamilyOptions, paranoid_file_checks),
OptionType::kBoolean, OptionVerificationType::kNormal}},
{"purge_redundant_kvs_while_flush",
{offsetof(struct ColumnFamilyOptions, purge_redundant_kvs_while_flush),
OptionType::kBoolean, OptionVerificationType::kNormal}},
{"verify_checksums_in_compaction",
{offsetof(struct ColumnFamilyOptions, verify_checksums_in_compaction),
OptionType::kBoolean, OptionVerificationType::kNormal}},
{"hard_pending_compaction_bytes_limit",
{offsetof(struct ColumnFamilyOptions, hard_pending_compaction_bytes_limit),
OptionType::kUInt64T, OptionVerificationType::kNormal}},
{"hard_rate_limit",
{offsetof(struct ColumnFamilyOptions, hard_rate_limit),
OptionType::kDouble, OptionVerificationType::kDeprecated}},
{"soft_rate_limit",
{offsetof(struct ColumnFamilyOptions, soft_rate_limit),
OptionType::kDouble, OptionVerificationType::kNormal}},
{"expanded_compaction_factor",
{offsetof(struct ColumnFamilyOptions, expanded_compaction_factor),
OptionType::kInt, OptionVerificationType::kNormal}},
{"level0_file_num_compaction_trigger",
{offsetof(struct ColumnFamilyOptions, level0_file_num_compaction_trigger),
OptionType::kInt, OptionVerificationType::kNormal}},
{"level0_slowdown_writes_trigger",
{offsetof(struct ColumnFamilyOptions, level0_slowdown_writes_trigger),
OptionType::kInt, OptionVerificationType::kNormal}},
{"level0_stop_writes_trigger",
{offsetof(struct ColumnFamilyOptions, level0_stop_writes_trigger),
OptionType::kInt, OptionVerificationType::kNormal}},
{"max_bytes_for_level_multiplier",
{offsetof(struct ColumnFamilyOptions, max_bytes_for_level_multiplier),
OptionType::kInt, OptionVerificationType::kNormal}},
{"max_grandparent_overlap_factor",
{offsetof(struct ColumnFamilyOptions, max_grandparent_overlap_factor),
OptionType::kInt, OptionVerificationType::kNormal}},
{"max_mem_compaction_level",
{offsetof(struct ColumnFamilyOptions, max_mem_compaction_level),
OptionType::kInt, OptionVerificationType::kDeprecated}},
{"max_write_buffer_number",
{offsetof(struct ColumnFamilyOptions, max_write_buffer_number),
OptionType::kInt, OptionVerificationType::kNormal}},
{"max_write_buffer_number_to_maintain",
{offsetof(struct ColumnFamilyOptions, max_write_buffer_number_to_maintain),
OptionType::kInt, OptionVerificationType::kNormal}},
{"min_write_buffer_number_to_merge",
{offsetof(struct ColumnFamilyOptions, min_write_buffer_number_to_merge),
OptionType::kInt, OptionVerificationType::kNormal}},
{"num_levels",
{offsetof(struct ColumnFamilyOptions, num_levels), OptionType::kInt,
OptionVerificationType::kNormal}},
{"source_compaction_factor",
{offsetof(struct ColumnFamilyOptions, source_compaction_factor),
OptionType::kInt, OptionVerificationType::kNormal}},
{"target_file_size_multiplier",
{offsetof(struct ColumnFamilyOptions, target_file_size_multiplier),
OptionType::kInt, OptionVerificationType::kNormal}},
{"arena_block_size",
{offsetof(struct ColumnFamilyOptions, arena_block_size),
OptionType::kSizeT, OptionVerificationType::kNormal}},
{"inplace_update_num_locks",
{offsetof(struct ColumnFamilyOptions, inplace_update_num_locks),
OptionType::kSizeT, OptionVerificationType::kNormal}},
{"max_successive_merges",
{offsetof(struct ColumnFamilyOptions, max_successive_merges),
OptionType::kSizeT, OptionVerificationType::kNormal}},
{"memtable_prefix_bloom_huge_page_tlb_size",
{offsetof(struct ColumnFamilyOptions,
memtable_prefix_bloom_huge_page_tlb_size),
OptionType::kSizeT, OptionVerificationType::kNormal}},
{"write_buffer_size",
{offsetof(struct ColumnFamilyOptions, write_buffer_size),
OptionType::kSizeT, OptionVerificationType::kNormal}},
{"bloom_locality",
{offsetof(struct ColumnFamilyOptions, bloom_locality),
OptionType::kUInt32T, OptionVerificationType::kNormal}},
{"memtable_prefix_bloom_bits",
{offsetof(struct ColumnFamilyOptions, memtable_prefix_bloom_bits),
OptionType::kUInt32T, OptionVerificationType::kNormal}},
{"memtable_prefix_bloom_probes",
{offsetof(struct ColumnFamilyOptions, memtable_prefix_bloom_probes),
OptionType::kUInt32T, OptionVerificationType::kNormal}},
{"min_partial_merge_operands",
{offsetof(struct ColumnFamilyOptions, min_partial_merge_operands),
OptionType::kUInt32T, OptionVerificationType::kNormal}},
{"max_bytes_for_level_base",
{offsetof(struct ColumnFamilyOptions, max_bytes_for_level_base),
OptionType::kUInt64T, OptionVerificationType::kNormal}},
{"max_sequential_skip_in_iterations",
{offsetof(struct ColumnFamilyOptions, max_sequential_skip_in_iterations),
OptionType::kUInt64T, OptionVerificationType::kNormal}},
{"target_file_size_base",
{offsetof(struct ColumnFamilyOptions, target_file_size_base),
OptionType::kUInt64T, OptionVerificationType::kNormal}},
{"rate_limit_delay_max_milliseconds",
{offsetof(struct ColumnFamilyOptions, rate_limit_delay_max_milliseconds),
OptionType::kUInt, OptionVerificationType::kDeprecated}},
{"compression",
{offsetof(struct ColumnFamilyOptions, compression),
OptionType::kCompressionType, OptionVerificationType::kNormal}},
{"compression_per_level",
{offsetof(struct ColumnFamilyOptions, compression_per_level),
OptionType::kVectorCompressionType, OptionVerificationType::kNormal}},
{"comparator",
{offsetof(struct ColumnFamilyOptions, comparator), OptionType::kComparator,
OptionVerificationType::kByName}},
{"prefix_extractor",
{offsetof(struct ColumnFamilyOptions, prefix_extractor),
OptionType::kSliceTransform, OptionVerificationType::kByName}},
{"memtable_factory",
{offsetof(struct ColumnFamilyOptions, memtable_factory),
OptionType::kMemTableRepFactory, OptionVerificationType::kByName}},
{"table_factory",
{offsetof(struct ColumnFamilyOptions, table_factory),
OptionType::kTableFactory, OptionVerificationType::kByName}},
{"compaction_filter",
{offsetof(struct ColumnFamilyOptions, compaction_filter),
OptionType::kCompactionFilter, OptionVerificationType::kByName}},
{"compaction_filter_factory",
{offsetof(struct ColumnFamilyOptions, compaction_filter_factory),
OptionType::kCompactionFilterFactory, OptionVerificationType::kByName}},
{"merge_operator",
{offsetof(struct ColumnFamilyOptions, merge_operator),
OptionType::kMergeOperator, OptionVerificationType::kByName}},
{"compaction_style",
{offsetof(struct ColumnFamilyOptions, compaction_style),
OptionType::kCompactionStyle, OptionVerificationType::kNormal}}};
} // namespace rocksdb
RocksDB Options file format and its serialization / deserialization. Summary: This patch defines the format of RocksDB options file, which follows the INI file format, and implements functions for its serialization and deserialization. An example RocksDB options file can be found in examples/rocksdb_option_file_example.ini. A typical RocksDB options file has three sections, which are Version, DBOptions, and more than one CFOptions. The RocksDB options file in general follows the basic INI file format with the following extensions / modifications: * Escaped characters We escaped the following characters: - \n -- line feed - new line - \r -- carriage return - \\ -- backslash \ - \: -- colon symbol : - \# -- hash tag # * Comments We support # style comments. Comments can appear at the ending part of a line. * Statements A statement is of the form option_name = value. Each statement contains a '=', where extra white-spaces are supported. However, we don't support multi-lined statement. Furthermore, each line can only contain at most one statement. * Section Sections are of the form [SecitonTitle "SectionArgument"], where section argument is optional. * List We use colon-separated string to represent a list. For instance, n1:n2:n3:n4 is a list containing four values. Below is an example of a RocksDB options file: [Version] rocksdb_version=4.0.0 options_file_version=1.0 [DBOptions] max_open_files=12345 max_background_flushes=301 [CFOptions "default"] [CFOptions "the second column family"] [CFOptions "the third column family"] Test Plan: Added many tests in options_test.cc Reviewers: igor, IslamAbdelRahman, sdong, anthony Reviewed By: anthony Subscribers: maykov, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D46059
2015-09-29 23:42:40 +02:00
#endif // !ROCKSDB_LITE