MYSQL并行复制（parallel replication部署篇）

MySQL5.6开始执行基于库级别的并行复制，MYSQL5.7支持基于表和行级别的并行复制（Enhanced Multi-Threaded Slave），这里主要是配置MYSQL5.7的基于组提交的并行复制。
一、环境描述 二、主要相关配置参数
node1节点：
#replicate
server-id=1001
skip-slave-start = false
read-only = false
log-slave-updates = 1
expire_logs_days = 2
max_binlog_size = 1G
max_binlog_cache_size = 2G
log-bin = /home/mysql/mysql-bin
log-bin-index = /home/mysql/bin-index
sync_binlog = 1
binlog_format = row
log-slow-slave-statements = 1
max-relay-log-size = 1G
relay-log = /home/mysql/mysql-relay
relay-log-index = /home/mysql/relay-index
relay_log_recovery=ON
gtid_mode=ON
enforce_gtid_consistency=ON
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE

node2节点
#replicate
server-id=1002
skip-slave-start = false
read-only = false
log-slave-updates = 1
expire_logs_days = 2
max_binlog_size = 1G
max_binlog_cache_size = 2G
log-bin = /home/mysql/mysql-bin
log-bin-index = /home/mysql/bin-index
sync_binlog = 1
binlog_format = row
log-slow-slave-statements = 1
max-relay-log-size = 1G
relay-log = /home/mysql/mysql-relay
relay-log-index = /home/mysql/relay-index
relay_log_recovery=ON
gtid_mode=ON
enforce_gtid_consistency=ON
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE

#parallel slave
slave-parallel-type=LOGICAL_CLOCK
slave-parallel-workers=8

##slave-parallel-type
  DATABASE：默认值，基于库的并行复制方式
  LOGICAL_CLOCK：基于组提交的并行复制方式
三、数据库启动并配置主从服务
数据库启动略
node2从节点执行下面命令：
change master to master_host='10.26.7.129',master_user='rpl_user',master_password='rpl_pass',master_port=3306,master_auto_position=1;
start slave;
show slave status \G

四、数据库多线程复制测试、状态监控
node1:

node2:

(root:localhost:Thu Jul 20 11:27:34 2017)[information_schema]>use performance_schema;
Database changed
(root:localhost:Thu Jul 20 11:27:38 2017)[performance_schema]>show tables like '%replica%';    
+-------------------------------------------+
| Tables_in_performance_schema (%replica%)  |
+-------------------------------------------+
| replication_applier_configuration         |
| replication_applier_status                |
| replication_applier_status_by_coordinator |
| replication_applier_status_by_worker      |
| replication_connection_configuration      |
| replication_connection_status             |
| replication_group_member_stats            |
| replication_group_members                 |
+-------------------------------------------+
8 rows in set (0.00 sec)

多线复制状态监控：
select * from  replication_applier_status_by_coordinator     ;
select * from   replication_applier_status_by_worker ;

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