MySQL 5.5中使用semi-sync replciation
原以為semi sync是5.5預設支援的。。發現原來是以外掛形式工作的。。。
外掛目錄:mysql-5.5.20/lib/plugin/
semisync_master.so semisync_slave.so
載入外掛模組:
mysql> show status like 'rpl%';
+---------------+-------------+
| Variable_name | Value |
+---------------+-------------+
| Rpl_status | AUTH_MASTER |
+---------------+-------------+
1 row in set (0.00 sec)
mysql> INSTALL PLUGIN rpl_semi_sync_master SONAME 'semisync_master.so';
Query OK, 0 rows affected (0.01 sec)
mysql> show variables like 'rpl%';
+------------------------------------+-------+
| Variable_name | Value |
+------------------------------------+-------+
| rpl_recovery_rank | 0 |
| rpl_semi_sync_master_enabled | OFF |
| rpl_semi_sync_master_timeout | 10000 |
| rpl_semi_sync_master_trace_level | 32 |
| rpl_semi_sync_master_wait_no_slave | ON |
+------------------------------------+-------+
5 rows in set (0.00 sec)
開啟semi sync的功能:
rpl_semi_sync_master_enabled = 1
http://www.orczhou.com/index.php/2011/06/mysql-5-5-semi-sync-replication-setup-config/
這篇文章介紹的比較詳細。。。。