复制参数优化

master配置优化

 

max_binlog_szie=128M-1G

binglog_format=row

binlog_row_image=full

gtid_mode =on

enforce_gtid_consistency =on

master_info_repository=table

 

binlog_group_commit_sync_delay=100       

binlog_group_commit_sync_no_delay_count=10

binlog_order_commits=off 

sync_binlog=0

 

 

 

 

slave 配置优化

 

io_thread

 

slave_net_timeout=20-30

 

change master to 相关优化(5.7默认)

master_connect_retry=60

master_connect_count=24*3600

master_auto_position=1

master_delay=0

 

sql_thread

 

log_slave_updates=on

relay_log_info_repository=table

relay_log_recovery=1

slave_parallel_type=logical_clock     ---启用并行复制

slave_parallel_workers=4|8

 

slave_checkpoint_group=512

slave_checkpoint_period=300

 

transaction_write_set_extraction=on

binlog_transaction_dependency_tracking=writeset_session

binlog_transaction_dependency_history_size=25000

 

slave_rows_search_algorithms=index_scan,hash_scan

 

无主键 或 使用外键  无法使用基于行级别并行复制

sync_relay_log_info =1 & relay_log_info_repository=table

增强半同步

加载plugin

install plugin rpl_semi_sync_master soname 'semisync_master.so'

install plugin rpl_semi_sync_slave soname 'semisync_slave.so'

 

master

set global rpl_semi_sync_master_enabled=1

set global rpl_semi_sync_master_timeout=N

set global rpl_semi_sync_master_wait_for_slave_count=N

set global innodb_flush_log_trx_commit=1

set global sync_binlog=1

 

slave

set global rpl_semi_sync_slave_enabled=1

set global read_only=1

set global super_read_only=1

set global innodb_flush_log_trx_commit=2

set global sync_binlog=0

 

stop slave

satrt slave

 

复制中重要功能启用

 

复制过滤

不建议在主库做过滤

binlog_do_db

binlog_ignore_do_db

 

针对sql_thread

change replication filter

replicate_do_db={db_list}

replicate_ignore_db={db_list}

replicate_do_table={tb_list}

replicate_ignore_table={tb_list}

replicate_wild_do_table={wild_tb_list}

 

延迟复制

 

stop slave sql_thread

change master to master_delay=3600

start slave sql_thread