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ha_rocksdb.cc
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/*
Copyright (c) 2012, Monty Program Ab
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifdef USE_PRAGMA_IMPLEMENTATION
#pragma implementation // gcc: Class implementation
#endif
#include <mysql/plugin.h>
#include "ha_rocksdb.h"
#include "ha_rocksdb_proto.h"
#include "sql_class.h"
#include "sql_array.h"
#include "my_bit.h"
#include <sstream>
#include "rdb_datadic.h"
#include "rdb_locks.h"
#include "rdb_rowmods.h"
#include "rdb_cf_options.h"
#include "rdb_cf_manager.h"
#include "rdb_dropped_indices.h"
#include "rdb_i_s.h"
#include "rocksdb/compaction_filter.h"
#include "rocksdb/env.h"
#include "rocksdb/rate_limiter.h"
#include "rocksdb/slice.h"
#include "rocksdb/slice_transform.h"
#include "rocksdb/table.h"
#include "rocksdb/metadata.h"
#include "rocksdb/utilities/convenience.h"
#include "rocksdb/utilities/flashcache.h"
#include "rocksdb/slice_transform.h"
#include "rocksdb/perf_context.h"
#include "properties_collector.h"
/* This is here to get PRIu64, PRId64 */
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
#include <inttypes.h>
#ifdef TARGET_OS_LINUX
#include <sys/syscall.h>
#include <sys/ioctl.h>
#include "flashcache_ioctl.h"
extern my_bool cachedev_enabled;
#endif /* TARGET_OS_LINUX */
void dbug_dump_database(rocksdb::DB *db);
static handler *rocksdb_create_handler(handlerton *hton,
TABLE_SHARE *table,
MEM_ROOT *mem_root);
void key_copy(uchar *to_key, uchar *from_record, KEY *key_info,
uint key_length);
void* background_thread(void*);
void* drop_index_thread(void*);
void signal_drop_index_thread(bool stop_thread = false);
bool can_use_bloom_filter(RDBSE_KEYDEF *keydef,
const rocksdb::Slice &eq_cond,
const bool use_all_keys,
bool is_ascending);
static ROCKSDB_SHARE *get_share(const char *table_name, TABLE *table);
static int free_share(ROCKSDB_SHARE *share);
///////////////////////////////////////////////////////////
// Parameters and settings
///////////////////////////////////////////////////////////
extern const longlong ROCKSDB_WRITE_BUFFER_SIZE_DEFAULT;
static char * rocksdb_default_cf_options;
static char * rocksdb_cf_options_file;
Cf_options rocksdb_cf_options_map;
///////////////////////////////////////////////////////////
// Globals
///////////////////////////////////////////////////////////
handlerton *rocksdb_hton;
rocksdb::DB *rdb= NULL;
static std::shared_ptr<rocksdb::Statistics> rocksdb_stats;
static std::unique_ptr<rocksdb::Env> flashcache_aware_env;
rocksdb::ColumnFamilyOptions default_cf_opts;
Dict_manager dict_manager;
Column_family_manager cf_manager;
Table_ddl_manager ddl_manager;
Binlog_info_manager binlog_manager;
LockTable row_locks;
/*
Hash used to track the number of open tables; variable for example share
methods
*/
static HASH rocksdb_open_tables;
/* The mutex used to init the hash; variable for example share methods */
mysql_mutex_t rocksdb_mutex;
mysql_mutex_t background_mutex;
mysql_mutex_t stop_cond_mutex;
mysql_cond_t stop_cond;
bool stop_background_thread;
//////////////////////////////////////////////////////////////////////////////
// Options parse support functions
//////////////////////////////////////////////////////////////////////////////
static int
rocksdb_cf_options_file_validate(THD* thd,
struct st_mysql_sys_var* var,
void* save,
struct st_mysql_value* value)
{
/* The option is read-only, it should never be updated */
DBUG_ASSERT(0);
return 1;
}
static void
rocksdb_cf_options_file_update(THD* thd,
struct st_mysql_sys_var* var,
void* var_ptr,
const void* save)
{
/* The option is read-only, it should never be updated */
DBUG_ASSERT(0);
}
static void
rocksdb_compact_column_family(THD* thd,
struct st_mysql_sys_var* var,
void* var_ptr,
const void* save)
{
if (const char* cf = *static_cast<const char*const*>(save)) {
bool is_automatic;
auto cfh = cf_manager.get_cf(cf, nullptr, nullptr, &is_automatic);
if (cfh != nullptr && rdb != nullptr) {
sql_print_information("RocksDB: Manual compaction of column family: %s\n", cf);
rdb->CompactRange(cfh, nullptr, nullptr);
}
}
}
static void
rocksdb_force_flush_memtable_now(THD* thd,
struct st_mysql_sys_var* var,
void* var_ptr,
const void* save)
{
sql_print_information("RocksDB: Manual memtable flush\n");
if (rdb)
rdb->Flush(rocksdb::FlushOptions());
}
}
static void
rocksdb_drop_index_wakeup_thread(THD* thd,
struct st_mysql_sys_var* var,
void* var_ptr,
const void* save)
{
if (*static_cast<const bool*>(save)) {
signal_drop_index_thread();
}
}
//////////////////////////////////////////////////////////////////////////////
// Options definitions
//////////////////////////////////////////////////////////////////////////////
static long long rocksdb_block_cache_size;
static uint64_t rocksdb_rate_limiter_bytes_per_sec;
static uint64_t rocksdb_info_log_level;
static char * rocksdb_wal_dir;
static uint64_t rocksdb_index_type;
static char rocksdb_background_sync;
static uint32_t rocksdb_debug_optimizer_n_rows;
static my_bool rocksdb_debug_optimizer_no_zero_cardinality;
static uint32_t rocksdb_perf_context_level;
static char * compact_cf_name;
static my_bool rocksdb_signal_drop_index_thread;
static my_bool rocksdb_collect_sst_properties = 1;
static my_bool rocksdb_force_flush_memtable_now_var = 0;
static uint64_t rocksdb_number_stat_computes = 0;
static uint32_t rocksdb_seconds_between_stat_computes = 3600;
static rocksdb::DBOptions init_db_options() {
rocksdb::DBOptions o;
o.create_if_missing = true;
return o;
}
static rocksdb::DBOptions db_options = init_db_options();
static rocksdb::BlockBasedTableOptions table_options;
static const char* info_log_level_names[] = {
"debug_level",
"info_level",
"warn_level",
"error_level",
"fatal_level",
NullS
};
static TYPELIB info_log_level_typelib = {
array_elements(info_log_level_names) - 1,
"info_log_level_typelib",
info_log_level_names,
nullptr
};
static const char* index_type_names[] = {
"kBinarySearch",
"kHashSearch",
NullS
};
static TYPELIB index_type_typelib = {
array_elements(index_type_names) - 1,
"index_type_typelib",
index_type_names,
nullptr
};
//TODO: 0 means don't wait at all, and we don't support it yet?
static MYSQL_THDVAR_ULONG(lock_wait_timeout, PLUGIN_VAR_RQCMDARG,
"Number of seconds to wait for lock",
NULL, NULL, /*default*/ 1, /*min*/ 1, /*max*/ 1024*1024*1024, 0);
static MYSQL_THDVAR_BOOL(bulk_load, PLUGIN_VAR_RQCMDARG,
"Use bulk-load mode for inserts", NULL, NULL, FALSE);
static MYSQL_THDVAR_ULONG(max_row_locks, PLUGIN_VAR_RQCMDARG,
"Maximum number of locks a transaction can have",
NULL, NULL, /*default*/ 1024*1024*1024, /*min*/ 1, /*max*/ 1024*1024*1024, 0);
static MYSQL_THDVAR_ULONG(bulk_load_size, PLUGIN_VAR_RQCMDARG,
"Max #records in a batch for bulk-load mode",
NULL, NULL, /*default*/ 1000, /*min*/ 1, /*max*/ 1024*1024*1024, 0);
static MYSQL_SYSVAR_BOOL(create_if_missing,
*reinterpret_cast<my_bool*>(&db_options.create_if_missing),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::create_if_missing for RocksDB",
NULL, NULL, db_options.create_if_missing);
static MYSQL_SYSVAR_BOOL(create_missing_column_families,
*reinterpret_cast<my_bool*>(&db_options.create_missing_column_families),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::create_missing_column_families for RocksDB",
NULL, NULL, db_options.create_missing_column_families);
static MYSQL_SYSVAR_BOOL(error_if_exists,
*reinterpret_cast<my_bool*>(&db_options.error_if_exists),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::error_if_exists for RocksDB",
NULL, NULL, db_options.error_if_exists);
static MYSQL_SYSVAR_BOOL(paranoid_checks,
*reinterpret_cast<my_bool*>(&db_options.paranoid_checks),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::paranoid_checks for RocksDB",
NULL, NULL, db_options.paranoid_checks);
static MYSQL_SYSVAR_ULONG(rate_limiter_bytes_per_sec,
rocksdb_rate_limiter_bytes_per_sec,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::rate_limiter bytes_per_sec for RocksDB",
NULL, NULL, 0L,
/* min */ 0L, /* max */ LONG_MAX, 0);
static MYSQL_SYSVAR_ENUM(info_log_level,
rocksdb_info_log_level,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::info_log_level for RocksDB",
NULL, NULL, db_options.info_log_level, &info_log_level_typelib);
static MYSQL_SYSVAR_UINT(perf_context_level,
rocksdb_perf_context_level,
PLUGIN_VAR_RQCMDARG,
"Perf Context Level for rocksdb internal timer stat collection",
NULL, NULL, rocksdb::kEnableCount,
/* min */ 0L, /* max */ UINT_MAX, 0);
static MYSQL_SYSVAR_INT(max_open_files,
db_options.max_open_files,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::max_open_files for RocksDB",
NULL, NULL, db_options.max_open_files,
/* min */ -1, /* max */ INT_MAX, 0);
static MYSQL_SYSVAR_ULONG(max_total_wal_size,
db_options.max_total_wal_size,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::max_total_wal_size for RocksDB",
NULL, NULL, db_options.max_total_wal_size,
/* min */ 0L, /* max */ LONG_MAX, 0);
static MYSQL_SYSVAR_BOOL(disableDataSync,
*reinterpret_cast<my_bool*>(&db_options.disableDataSync),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::disableDataSync for RocksDB",
NULL, NULL, db_options.disableDataSync);
static MYSQL_SYSVAR_BOOL(use_fsync,
*reinterpret_cast<my_bool*>(&db_options.use_fsync),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::use_fsync for RocksDB",
NULL, NULL, db_options.use_fsync);
static MYSQL_SYSVAR_STR(wal_dir, rocksdb_wal_dir,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::wal_dir for RocksDB",
NULL, NULL, db_options.wal_dir.c_str());
static MYSQL_SYSVAR_ULONG(delete_obsolete_files_period_micros,
db_options.delete_obsolete_files_period_micros,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::delete_obsolete_files_period_micros for RocksDB",
NULL, NULL, db_options.delete_obsolete_files_period_micros,
/* min */ 0L, /* max */ LONG_MAX, 0);
static MYSQL_SYSVAR_INT(max_background_compactions,
db_options.max_background_compactions,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::max_background_compactions for RocksDB",
NULL, NULL, db_options.max_background_compactions,
/* min */ 1, /* max */ INT_MAX, 0);
static MYSQL_SYSVAR_INT(max_background_flushes,
db_options.max_background_flushes,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::max_background_flushes for RocksDB",
NULL, NULL, db_options.max_background_flushes,
/* min */ 1, /* max */ INT_MAX, 0);
static MYSQL_SYSVAR_ULONG(max_log_file_size,
db_options.max_log_file_size,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::max_log_file_size for RocksDB",
NULL, NULL, db_options.max_log_file_size,
/* min */ 0L, /* max */ LONG_MAX, 0);
static MYSQL_SYSVAR_ULONG(log_file_time_to_roll,
db_options.log_file_time_to_roll,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::log_file_time_to_roll for RocksDB",
NULL, NULL, db_options.log_file_time_to_roll,
/* min */ 0L, /* max */ LONG_MAX, 0);
static MYSQL_SYSVAR_ULONG(keep_log_file_num,
db_options.keep_log_file_num,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::keep_log_file_num for RocksDB",
NULL, NULL, db_options.keep_log_file_num,
/* min */ 0L, /* max */ LONG_MAX, 0);
static MYSQL_SYSVAR_ULONG(max_manifest_file_size,
db_options.max_manifest_file_size,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::max_manifest_file_size for RocksDB",
NULL, NULL, db_options.max_manifest_file_size,
/* min */ 0L, /* max */ ULONG_MAX, 0);
static MYSQL_SYSVAR_INT(table_cache_numshardbits,
db_options.table_cache_numshardbits,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::table_cache_numshardbits for RocksDB",
NULL, NULL, db_options.table_cache_numshardbits,
/* min */ 0, /* max */ INT_MAX, 0);
static MYSQL_SYSVAR_ULONG(WAL_ttl_seconds,
db_options.WAL_ttl_seconds,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::WAL_ttl_seconds for RocksDB",
NULL, NULL, db_options.WAL_ttl_seconds,
/* min */ 0L, /* max */ LONG_MAX, 0);
static MYSQL_SYSVAR_ULONG(WAL_size_limit_MB,
db_options.WAL_size_limit_MB,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::WAL_size_limit_MB for RocksDB",
NULL, NULL, db_options.WAL_size_limit_MB,
/* min */ 0L, /* max */ LONG_MAX, 0);
static MYSQL_SYSVAR_ULONG(manifest_preallocation_size,
db_options.manifest_preallocation_size,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::manifest_preallocation_size for RocksDB",
NULL, NULL, db_options.manifest_preallocation_size,
/* min */ 0L, /* max */ LONG_MAX, 0);
static MYSQL_SYSVAR_BOOL(allow_os_buffer,
*reinterpret_cast<my_bool*>(&db_options.allow_os_buffer),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::allow_os_buffer for RocksDB",
NULL, NULL, db_options.allow_os_buffer);
static MYSQL_SYSVAR_BOOL(allow_mmap_reads,
*reinterpret_cast<my_bool*>(&db_options.allow_mmap_reads),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::allow_mmap_reads for RocksDB",
NULL, NULL, db_options.allow_mmap_reads);
static MYSQL_SYSVAR_BOOL(allow_mmap_writes,
*reinterpret_cast<my_bool*>(&db_options.allow_mmap_writes),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::allow_mmap_writes for RocksDB",
NULL, NULL, db_options.allow_mmap_writes);
static MYSQL_SYSVAR_BOOL(is_fd_close_on_exec,
*reinterpret_cast<my_bool*>(&db_options.is_fd_close_on_exec),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::is_fd_close_on_exec for RocksDB",
NULL, NULL, db_options.is_fd_close_on_exec);
static MYSQL_SYSVAR_BOOL(skip_log_error_on_recovery,
*reinterpret_cast<my_bool*>(&db_options.skip_log_error_on_recovery),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::skip_log_error_on_recovery for RocksDB",
NULL, NULL, db_options.skip_log_error_on_recovery);
static MYSQL_SYSVAR_UINT(stats_dump_period_sec,
db_options.stats_dump_period_sec,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::stats_dump_period_sec for RocksDB",
NULL, NULL, db_options.stats_dump_period_sec,
/* min */ 0, /* max */ INT_MAX, 0);
static MYSQL_SYSVAR_BOOL(advise_random_on_open,
*reinterpret_cast<my_bool*>(&db_options.advise_random_on_open),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::advise_random_on_open for RocksDB",
NULL, NULL, db_options.advise_random_on_open);
static MYSQL_SYSVAR_ULONG(db_write_buffer_size,
db_options.db_write_buffer_size,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::db_write_buffer_size for RocksDB",
NULL, NULL, db_options.db_write_buffer_size,
/* min */ 0L, /* max */ LONG_MAX, 0);
static MYSQL_SYSVAR_BOOL(use_adaptive_mutex,
*reinterpret_cast<my_bool*>(&db_options.use_adaptive_mutex),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::use_adaptive_mutex for RocksDB",
NULL, NULL, db_options.use_adaptive_mutex);
static MYSQL_SYSVAR_ULONG(bytes_per_sync,
db_options.bytes_per_sync,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::bytes_per_sync for RocksDB",
NULL, NULL, db_options.bytes_per_sync,
/* min */ 0L, /* max */ LONG_MAX, 0);
static MYSQL_SYSVAR_ULONG(wal_bytes_per_sync,
db_options.wal_bytes_per_sync,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::wal_bytes_per_sync for RocksDB",
NULL, NULL, db_options.wal_bytes_per_sync,
/* min */ 0L, /* max */ LONG_MAX, 0);
static MYSQL_SYSVAR_BOOL(enable_thread_tracking,
*reinterpret_cast<my_bool*>(&db_options.enable_thread_tracking),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"DBOptions::enable_thread_tracking for RocksDB",
NULL, NULL, db_options.enable_thread_tracking);
static MYSQL_SYSVAR_LONGLONG(block_cache_size, rocksdb_block_cache_size,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"block_cache size for RocksDB",
NULL, NULL, /* RocksDB's default is 8 MB: */ 8*1024*1024L,
/* min */ 1024L, /* max */ LONGLONG_MAX, /* Block size */1024L);
static MYSQL_SYSVAR_BOOL(cache_index_and_filter_blocks,
*reinterpret_cast<my_bool*>(&table_options.cache_index_and_filter_blocks),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"BlockBasedTableOptions::cache_index_and_filter_blocks for RocksDB",
NULL, NULL, true);
static MYSQL_SYSVAR_ENUM(index_type,
rocksdb_index_type,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"BlockBasedTableOptions::index_type for RocksDB",
NULL, NULL, (uint64_t)table_options.index_type, &index_type_typelib);
static MYSQL_SYSVAR_BOOL(hash_index_allow_collision,
*reinterpret_cast<my_bool*>(&table_options.hash_index_allow_collision),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"BlockBasedTableOptions::hash_index_allow_collision for RocksDB",
NULL, NULL, table_options.hash_index_allow_collision);
static MYSQL_SYSVAR_BOOL(no_block_cache,
*reinterpret_cast<my_bool*>(&table_options.no_block_cache),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"BlockBasedTableOptions::no_block_cache for RocksDB",
NULL, NULL, table_options.no_block_cache);
static MYSQL_SYSVAR_ULONG(block_size,
table_options.block_size,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"BlockBasedTableOptions::block_size for RocksDB",
NULL, NULL, table_options.block_size,
/* min */ 1L, /* max */ LONG_MAX, 0);
static MYSQL_SYSVAR_INT(block_size_deviation,
table_options.block_size_deviation,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"BlockBasedTableOptions::block_size_deviation for RocksDB",
NULL, NULL, table_options.block_size_deviation,
/* min */ 0, /* max */ INT_MAX, 0);
static MYSQL_SYSVAR_INT(block_restart_interval,
table_options.block_restart_interval,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"BlockBasedTableOptions::block_restart_interval for RocksDB",
NULL, NULL, table_options.block_restart_interval,
/* min */ 0, /* max */ INT_MAX, 0);
static MYSQL_SYSVAR_BOOL(whole_key_filtering,
*reinterpret_cast<my_bool*>(&table_options.whole_key_filtering),
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"BlockBasedTableOptions::whole_key_filtering for RocksDB",
NULL, NULL, table_options.whole_key_filtering);
static MYSQL_SYSVAR_STR(default_cf_options, rocksdb_default_cf_options,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"default cf options for RocksDB",
NULL, NULL, "");
static MYSQL_SYSVAR_STR(cf_options_file, rocksdb_cf_options_file,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"path to cnf file with cf options for RocksDB",
rocksdb_cf_options_file_validate,
rocksdb_cf_options_file_update, "");
static MYSQL_SYSVAR_BOOL(background_sync,
rocksdb_background_sync,
PLUGIN_VAR_RQCMDARG,
"turns on background syncs for RocksDB",
NULL, NULL, FALSE);
static MYSQL_THDVAR_BOOL(write_sync,
PLUGIN_VAR_RQCMDARG,
"WriteOptions::sync for RocksDB",
NULL, NULL, rocksdb::WriteOptions().sync);
static MYSQL_THDVAR_BOOL(write_disable_wal,
PLUGIN_VAR_RQCMDARG,
"WriteOptions::disableWAL for RocksDB",
NULL, NULL, rocksdb::WriteOptions().disableWAL);
static MYSQL_THDVAR_ULONG(write_timeout_hint_us,
PLUGIN_VAR_RQCMDARG,
"WriteOptions::timeout_hint_us for RocksDB",
NULL, NULL, rocksdb::WriteOptions().timeout_hint_us,
/* min */ 0L, /* max */ LONG_MAX, 0);
static MYSQL_THDVAR_BOOL(write_ignore_missing_column_families,
PLUGIN_VAR_RQCMDARG,
"WriteOptions::ignore_missing_column_families for RocksDB",
NULL, NULL, rocksdb::WriteOptions().ignore_missing_column_families);
static MYSQL_THDVAR_BOOL(skip_fill_cache,
PLUGIN_VAR_RQCMDARG,
"Skip filling block cache on read requests",
NULL, NULL, FALSE);
static MYSQL_THDVAR_UINT(records_in_range,
PLUGIN_VAR_RQCMDARG,
"Used to override the result of records_in_range(). Set to a positive number to override",
NULL, NULL, 0,
/* min */ 0, /* max */ INT_MAX, 0);
static MYSQL_SYSVAR_UINT(debug_optimizer_n_rows,
rocksdb_debug_optimizer_n_rows,
PLUGIN_VAR_RQCMDARG,
"Used for info(). Testing purpose only and will be deprecated",
NULL, NULL, 1000,
/* min */ 0, /* max */ INT_MAX, 0);
static MYSQL_SYSVAR_BOOL(debug_optimizer_no_zero_cardinality,
rocksdb_debug_optimizer_no_zero_cardinality,
PLUGIN_VAR_RQCMDARG,
"In case if cardinality is zero, overrides it with some value",
NULL, NULL, TRUE);
static MYSQL_SYSVAR_STR(compact_cf, compact_cf_name,
PLUGIN_VAR_RQCMDARG,
"Compact column family",
NULL, rocksdb_compact_column_family, "");
static MYSQL_SYSVAR_BOOL(signal_drop_index_thread,
rocksdb_signal_drop_index_thread,
PLUGIN_VAR_RQCMDARG,
"Wake up drop index thread",
NULL, rocksdb_drop_index_wakeup_thread, FALSE);
static MYSQL_SYSVAR_BOOL(collect_sst_properties,
rocksdb_collect_sst_properties,
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
"Enables collecting SST file properties on each flush",
NULL, NULL, rocksdb_collect_sst_properties);
static MYSQL_SYSVAR_BOOL(
force_flush_memtable_now,
rocksdb_force_flush_memtable_now_var,
PLUGIN_VAR_RQCMDARG,
"Forces memstore flush which may block all write requests so be careful",
NULL, rocksdb_force_flush_memtable_now, FALSE);
static MYSQL_SYSVAR_UINT(seconds_between_stat_computes,
rocksdb_seconds_between_stat_computes,
PLUGIN_VAR_RQCMDARG,
"Sets a number of seconds to wait between optimizer stats recomputation. "
"Only changed indexes will be refreshed.",
NULL, NULL, rocksdb_seconds_between_stat_computes,
/* min */ 0L, /* max */ UINT_MAX, 0);
const longlong ROCKSDB_WRITE_BUFFER_SIZE_DEFAULT=4194304;
static struct st_mysql_sys_var* rocksdb_system_variables[]= {
MYSQL_SYSVAR(lock_wait_timeout),
MYSQL_SYSVAR(max_row_locks),
MYSQL_SYSVAR(bulk_load),
MYSQL_SYSVAR(bulk_load_size),
MYSQL_SYSVAR(create_if_missing),
MYSQL_SYSVAR(create_missing_column_families),
MYSQL_SYSVAR(error_if_exists),
MYSQL_SYSVAR(paranoid_checks),
MYSQL_SYSVAR(rate_limiter_bytes_per_sec),
MYSQL_SYSVAR(info_log_level),
MYSQL_SYSVAR(max_open_files),
MYSQL_SYSVAR(max_total_wal_size),
MYSQL_SYSVAR(disableDataSync),
MYSQL_SYSVAR(use_fsync),
MYSQL_SYSVAR(wal_dir),
MYSQL_SYSVAR(delete_obsolete_files_period_micros),
MYSQL_SYSVAR(max_background_compactions),
MYSQL_SYSVAR(max_background_flushes),
MYSQL_SYSVAR(max_log_file_size),
MYSQL_SYSVAR(log_file_time_to_roll),
MYSQL_SYSVAR(keep_log_file_num),
MYSQL_SYSVAR(max_manifest_file_size),
MYSQL_SYSVAR(table_cache_numshardbits),
MYSQL_SYSVAR(WAL_ttl_seconds),
MYSQL_SYSVAR(WAL_size_limit_MB),
MYSQL_SYSVAR(manifest_preallocation_size),
MYSQL_SYSVAR(allow_os_buffer),
MYSQL_SYSVAR(allow_mmap_reads),
MYSQL_SYSVAR(allow_mmap_writes),
MYSQL_SYSVAR(is_fd_close_on_exec),
MYSQL_SYSVAR(skip_log_error_on_recovery),
MYSQL_SYSVAR(stats_dump_period_sec),
MYSQL_SYSVAR(advise_random_on_open),
MYSQL_SYSVAR(db_write_buffer_size),
MYSQL_SYSVAR(use_adaptive_mutex),
MYSQL_SYSVAR(bytes_per_sync),
MYSQL_SYSVAR(wal_bytes_per_sync),
MYSQL_SYSVAR(enable_thread_tracking),
MYSQL_SYSVAR(perf_context_level),
MYSQL_SYSVAR(block_cache_size),
MYSQL_SYSVAR(cache_index_and_filter_blocks),
MYSQL_SYSVAR(index_type),
MYSQL_SYSVAR(hash_index_allow_collision),
MYSQL_SYSVAR(no_block_cache),
MYSQL_SYSVAR(block_size),
MYSQL_SYSVAR(block_size_deviation),
MYSQL_SYSVAR(block_restart_interval),
MYSQL_SYSVAR(whole_key_filtering),
MYSQL_SYSVAR(default_cf_options),
MYSQL_SYSVAR(cf_options_file),
MYSQL_SYSVAR(background_sync),
MYSQL_SYSVAR(write_sync),
MYSQL_SYSVAR(write_disable_wal),
MYSQL_SYSVAR(write_timeout_hint_us),
MYSQL_SYSVAR(write_ignore_missing_column_families),
MYSQL_SYSVAR(skip_fill_cache),
MYSQL_SYSVAR(records_in_range),
MYSQL_SYSVAR(debug_optimizer_n_rows),
MYSQL_SYSVAR(debug_optimizer_no_zero_cardinality),
MYSQL_SYSVAR(compact_cf),
MYSQL_SYSVAR(signal_drop_index_thread),
MYSQL_SYSVAR(collect_sst_properties),
MYSQL_SYSVAR(force_flush_memtable_now),
MYSQL_SYSVAR(seconds_between_stat_computes),
NULL
};
rocksdb::WriteOptions get_write_options(THD* thd)
{
rocksdb::WriteOptions opt;
opt.sync = THDVAR(thd, write_sync);
opt.disableWAL = THDVAR(thd, write_disable_wal);
opt.timeout_hint_us = THDVAR(thd, write_timeout_hint_us);
opt.ignore_missing_column_families =
THDVAR(thd, write_ignore_missing_column_families);
return opt;
}
///////////////////////////////////////////////////////////////////////////////////////////
/**
@brief
Function we use in the creation of our hash to get key.
*/
static uchar* rocksdb_get_key(ROCKSDB_SHARE *share, size_t *length,
my_bool not_used MY_ATTRIBUTE((unused)))
{
*length=share->table_name_length;
return (uchar*) share->table_name;
}
/*
The following is needed as an argument for thd_enter_cond, irrespectively of
whether we're compiling with P_S or not.
*/
PSI_stage_info stage_waiting_on_row_lock= { 0, "Waiting for row lock", 0};
#ifdef HAVE_PSI_INTERFACE
static PSI_thread_key key_thread_background;
static PSI_thread_key key_thread_drop_index;
static PSI_stage_info *all_rocksdb_stages[]=
{
& stage_waiting_on_row_lock
};
static PSI_mutex_key ex_key_mutex_example, ex_key_mutex_ROCKSDB_SHARE_mutex,
key_mutex_background, key_mutex_stop_background,
key_mutex_drop_index, key_drop_index_interrupt_mutex;
static PSI_mutex_info all_rocksdb_mutexes[]=
{
{ &ex_key_mutex_example, "rocksdb", PSI_FLAG_GLOBAL},
{ &ex_key_mutex_ROCKSDB_SHARE_mutex, "ROCKSDB_SHARE::mutex", 0},
{ &key_mutex_background, "background", PSI_FLAG_GLOBAL},
{ &key_mutex_stop_background, "stop background", PSI_FLAG_GLOBAL},
{ &key_mutex_drop_index, "drop index", PSI_FLAG_GLOBAL},
{ &key_drop_index_interrupt_mutex, "drop index interrupt", PSI_FLAG_GLOBAL},
{ &key_mutex_dropped_indices_manager, "dropped indices manager", PSI_FLAG_GLOBAL},
};
PSI_cond_key key_cond_stop, key_drop_index_interrupt_cond;
static PSI_cond_info all_rocksdb_conds[]=
{
{ &key_cond_stop, "cond_stop", PSI_FLAG_GLOBAL},
{ &key_drop_index_interrupt_cond, "cond_stop_drop_index", PSI_FLAG_GLOBAL},
};
static PSI_thread_info all_rocksdb_threads[]=
{
{ &key_thread_background, "background", PSI_FLAG_GLOBAL},
{ &key_thread_drop_index, "drop index", PSI_FLAG_GLOBAL},
};
static void init_rocksdb_psi_keys()
{
const char* category= "rocksdb";
int count;
if (PSI_server == NULL)
return;
count= array_elements(all_rocksdb_mutexes);
PSI_server->register_mutex(category, all_rocksdb_mutexes, count);
count= array_elements(all_rocksdb_conds);
PSI_server->register_cond(category, all_rocksdb_conds, count);
count= array_elements(all_rocksdb_stages);
mysql_stage_register(category, all_rocksdb_stages, count);
count= array_elements(all_rocksdb_threads);
mysql_thread_register(category, all_rocksdb_threads, count);
}
#endif
static int bytewise_compare(const rocksdb::Slice& a, const rocksdb::Slice& b)
{
size_t a_size= a.size();
size_t b_size= b.size();
size_t len= (a_size < b_size) ? a_size : b_size;
int res;
if ((res= memcmp(a.data(), b.data(), len)))
return res;
/* Ok, res== 0 */
if (a_size != b_size)
{
return a_size < b_size? -1 : 1;
}
return 0;
}
/*
The keys are in form: {index_number} {mem-comparable-key}
(todo: knowledge about this format is shared between this class and
RDBSE_KEYDEF)
*/
class Primary_key_comparator : public rocksdb::Comparator
{
public:
int Compare(const rocksdb::Slice& a, const rocksdb::Slice& b) const
{
return bytewise_compare(a,b);
}
/* The following is not needed by RocksDB, but conceptually should be here: */
static ulong get_hashnr(const char *key, size_t key_len);
const char* Name() const { return "RocksDB_SE_v3.7"; }
//TODO: advanced funcs:
// - FindShortestSeparator
// - FindShortSuccessor
// for now, do-nothing implementations:
void FindShortestSeparator(std::string* start, const rocksdb::Slice& limit) const {}
void FindShortSuccessor(std::string* key) const {}
};
class Reverse_comparator : public rocksdb::Comparator
{
int Compare(const rocksdb::Slice& a, const rocksdb::Slice& b) const
{
return -bytewise_compare(a,b);
}
const char* Name() const { return "rev:RocksDB_SE_v3.7"; }
void FindShortestSeparator(std::string* start, const rocksdb::Slice& limit) const {}
void FindShortSuccessor(std::string* key) const {}
};
Primary_key_comparator rocksdb_pk_comparator;
Reverse_comparator rocksdb_rev_pk_comparator;
/*
This function doesn't support reverse comparisons. They are handled by the
caller.
*/
int compare_mem_comparable_keys(const uchar *a, size_t a_len, const uchar *b, size_t b_len)
{
rocksdb::Slice a_slice((char*)a, a_len);
rocksdb::Slice b_slice((char*)b, b_len);
return rocksdb_pk_comparator.Compare(a_slice, b_slice);
}
static Dropped_indices_manager dropped_indices_manager;
static mysql_mutex_t drop_index_mutex;
static mysql_mutex_t drop_index_interrupt_mutex;
static mysql_cond_t drop_index_interrupt_cond;
static bool stop_drop_index_thread;
class Rdb_CompactionFilter : public rocksdb::CompactionFilter
{
public:
Rdb_CompactionFilter() {}
~Rdb_CompactionFilter()
{
print_compaction_status();
}
// keys are passed in sorted order within the same sst.
// V1 Filter is thread safe on our usage (creating from Factory).
// Make sure to protect instance variables when switching to thread
// unsafe in the future.
virtual bool Filter(int level,
const rocksdb::Slice& key,
const rocksdb::Slice& existing_value,
std::string* new_value,
bool* value_changed) const override {
DBUG_ASSERT(key.size() >= sizeof(uint32));
uint32 index= read_big_uint4((const uchar*)key.data());
DBUG_ASSERT(index >= 1);
if (index != prev_index) // processing new index id
{
if (num_deleted > 0)
{
print_compaction_status();
num_deleted= 0;
}
should_delete= dropped_indices_manager.has_index(index);
prev_index= index;
}
if (should_delete)
num_deleted++;
return should_delete;
}
virtual const char* Name() const override {
return "Rdb_CompactionFilter";
}
private:
void print_compaction_status() const
{
if (num_deleted > 0)
sql_print_information("RocksDB: Compacting away elements from dropped "
"index %u: %llu", prev_index, num_deleted);
}
// Index id of the previous record
mutable uint32 prev_index= 0;
// Number of rows deleted for the same index id
mutable uint64 num_deleted= 0;
// Current index id should be deleted or not (should be deleted if true)
mutable bool should_delete= false;
};
class Rdb_CompactionFilterFactory : public rocksdb::CompactionFilterFactory
{
public:
Rdb_CompactionFilterFactory() {}
~Rdb_CompactionFilterFactory() {}
const char* Name() const override {
return "Rdb_CompactionFilterFactory";
}
std::unique_ptr<rocksdb::CompactionFilter> CreateCompactionFilter(
const rocksdb::CompactionFilter::Context& context) {
return std::unique_ptr<rocksdb::CompactionFilter>(
new Rdb_CompactionFilter);
}
};
/*
This is a rocksdb connection. Its members represent the current transaction,
which consists of:
- the snapshot
- the changes we've made but are not seeing yet.
The changes are made to individual tables, which store them here and then
this object commits them on commit.
*/
class Rdb_transaction
{
public:
/* The snapshot the transaction is used */
const rocksdb::Snapshot *snapshot;
/* The changes made by this transaction (and not yet applied) */
Row_table changes;
uint n_writes;
const char* mysql_log_file_name;
my_off_t mysql_log_offset;
const char* mysql_gtid;
/*
These are needed to use LF-Hash. They are allocated per-thread. Logically,
they are not part of the transaction but it's convenient to have them here.
*/