确认master和slave上是否开启have_dynamic_loading

master

MASTER(none) 10:54:58>show variables like 'have_dynamic_loading';
+----------------------+-------+| Variable_name 
| Value |+----------------------+-------+| have_dynamic_loading | YES 
|+----------------------+-------+

slave

SLAVEtest 10:47:52>show variables like 'have_dynamic_loading';
+----------------------+-------+| Variable_name 
| Value |+----------------------+-------+| have_dynamic_loading | YES 
|+----------------------+-------+

使用root在master上安装半同步插件

MASTER(none) 10:58:14>MASTER(none) 10:58:14>install plugin rpl_semi_sync_master soname 
'semisync_master.so';Query OK, 0 rows affected (0.01 sec)MASTER(none) 10:58:22>show plugins;
+--------------------------+--------+--------------------+--------------------+---------+| 
Name | Status | Type | Library | License |
+--------------------------+--------+--------------------+--------------------+---------+| 
binlog | ACTIVE | STORAGE ENGINE | NULL | GPL || 
mysql_native_password | ACTIVE | AUTHENTICATION | NULL | GPL || 
mysql_old_password | ACTIVE | AUTHENTICATION | NULL | GPL || 
MRG_MYISAM | ACTIVE | STORAGE ENGINE | NULL | GPL || 
CSV | ACTIVE | STORAGE ENGINE | NULL | GPL || 
MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL ||
 MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL || 
 InnoDB | ACTIVE | STORAGE ENGINE | NULL | GPL ||
 INNODB_TRX | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_LOCKS | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_LOCK_WAITS | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_CMP | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_CMP_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_CMPMEM | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_CMPMEM_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_BUFFER_PAGE | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_BUFFER_PAGE_LRU | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_BUFFER_POOL_STATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 BLACKHOLE | ACTIVE | STORAGE ENGINE | NULL | GPL 
 || ARCHIVE | ACTIVE | STORAGE ENGINE | NULL | GPL || 
 FEDERATED | ACTIVE | STORAGE ENGINE | NULL | GPL || 
 PERFORMANCE_SCHEMA | ACTIVE | STORAGE ENGINE | NULL | GPL || 
 partition | ACTIVE | STORAGE ENGINE | NULL | GPL || 
 rpl_semi_sync_master | ACTIVE | REPLICATION | semisync_master.so | GPL 
 |+--------------------------+--------+--------------------+--------------------+---------+

使用root在slave上安装半同步插件

SLAVEtest 10:55:18>install plugin rpl_semi_sync_slave soname 'semisync_slave.so';Query OK, 0 rows 
affected (0.01 sec)SLAVEtest 10:59:45>show plugins;
+--------------------------+--------+--------------------+-------------------+---------+| 
Name | Status | Type | Library | License |
+--------------------------+--------+--------------------+-------------------+---------+| binlog 
| ACTIVE | STORAGE ENGINE | NULL | GPL || mysql_native_password | 
ACTIVE | AUTHENTICATION | NULL | GPL || 
mysql_old_password | ACTIVE | AUTHENTICATION | NULL | GPL || 
MRG_MYISAM | ACTIVE | STORAGE ENGINE | NULL | GPL || 
CSV | ACTIVE | STORAGE ENGINE | NULL| GPL ||
 MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL || 
 MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL || 
 InnoDB | ACTIVE | STORAGE ENGINE | NULL| GPL || 
 INNODB_TRX | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_LOCKS | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_LOCK_WAITS | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_CMP | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_CMP_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_CMPMEM | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_CMPMEM_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_BUFFER_PAGE | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_BUFFER_PAGE_LRU | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 INNODB_BUFFER_POOL_STATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL || 
 BLACKHOLE | ACTIVE | STORAGE ENGINE | NULL | GPL || 
 ARCHIVE | ACTIVE | STORAGE ENGINE | NULL | GPL || 
 FEDERATED | ACTIVE | STORAGE ENGINE | NULL | GPL || 
 PERFORMANCE_SCHEMA | ACTIVE | STORAGE ENGINE | NULL | GPL || 
 partition | ACTIVE | STORAGE ENGINE | NULL| GPL || 
 rpl_semi_sync_slave | ACTIVE | REPLICATION | semisync_slave.so | GPL 
 |+--------------------------+--------+--------------------+-------------------+---------+

分别在master和slave的my.cnf里添加以下配置

master

rpl_semi_sync_master_enabled=1rpl_semi_sync_master_timeout=1000rpl_semi_sync_master_trace_level=32rpl_semi_
sync_master_wait_no_slave=on

slave

rpl_semi_sync_slave_enabled=1

master日志

140203 23:06:17 [Note] Semi-sync replication initialized for transactions.140203 23:06:17 [Note] 
Semi-sync replication enabled on the master.140203 23:06:17 [Note] Server hostname (bind-address): 
'0.0.0.0'; port: 30307140203 23:06:17 [Note] 
- '0.0.0.0' resolves to '0.0.0.0';140203 23:06:17 [Note] 
Server socket created on IP: '0.0.0.0'.140203 23:06:17 
[Warning] 'proxies_priv' entry '@ root@mynode1' ignored in --skip-name-resolve mode.140203 23:06:17 
[Note] Event Scheduler: Loaded 0 events140203 23:06:17 [Note] /service/mysql/bin/mysqld: ready 
for connections.Version: '5.5.34-log' socket: '/data/mysql/mysql.sock' port: 30307 
MASTER_DB140203 23:06:17 [Note] Event Scheduler: scheduler thread started with id 1140203 
23:06:20 [Note] Start semi-sync binlog_dump to slave (server_id: 2), pos(binlog-master.000010, 290)

slave日志

140203 23:06:20 [Note] Slave I/O thread: Start semi-sync replication to master 'rep@mynode1:30307' 
in log 'binlog-master.000010' at position 290140203 23:06:20 [Note] Slave SQL thread initialized, 
starting replication in log 'binlog-master.000010' at position 290, relay log './mynode2-relay-bin.
000029' position: 440140203 23:06:20 [Note] Event Scheduler: scheduler thread started with id 
1140203 23:06:20 [Note] Slave I/O thread: connected to master 'rep@mynode1:30307',replication 
started in log 'binlog-master.000010' at position 290

MASTERtest 11:10:41>show global status like 'rpl%';
+--------------------------------------------+-------------+| Variable_name | Value |
+--------------------------------------------+-------------+| Rpl_semi_sync_master_clients | 
1 || Rpl_semi_sync_master_net_avg_wait_time | 619 || Rpl_semi_sync_master_net_wait_time | 
619 || Rpl_semi_sync_master_net_waits | 1 || 
Rpl_semi_sync_master_no_times | 0 || Rpl_semi_sync_master_no_tx | 
0 || Rpl_semi_sync_master_status | ON || 
Rpl_semi_sync_master_timefunc_failures | 0 || 
Rpl_semi_sync_master_tx_avg_wait_time | 734 || Rpl_semi_sync_master_tx_wait_time 
| 734 || Rpl_semi_sync_master_tx_waits | 1 
|| Rpl_semi_sync_master_wait_pos_backtraverse | 0 || Rpl_semi_sync_master_wait_sessions 
| 0 || Rpl_semi_sync_master_yes_tx | 1 
|| Rpl_status | AUTH_MASTER 
|+--------------------------------------------+-------------+

SLAVEtest 11:10:02>show global status like 'rpl%';
+----------------------------+-------------+| Variable_name | Value 
|+----------------------------+-------------+| Rpl_semi_sync_slave_status | ON 
|| Rpl_status | AUTH_MASTER |+----------------------------+-------------+