一.mysql5.5.6 安裝 1.解除安裝原有的 mysql #rpm -qa
 
grep -i mysql #rpm -ev MySQL-client-5.5.6_rc-1.linux2.6 #rpm -ev MySQL-server-5.5.6_rc-1.linux2.6 解除安裝後/var/lib/mysql 中的資料及/etc/my.cnf 不會刪除，如果確定沒用後就手工刪除 #rm -f /etc/my.cnf #rm -rf /var/lib/mysql
2.安裝 mysql5.5.6 #rpm -ivh MySQL-server-5.5.6_rc-1.linux2.6.i386.rpm MySQL-client-5.5.6_rc-1.linux2.6.i386.rpm #/usr/bin/mysqladmin -u root password 'founder'
#/usr/bin/mysqladmin -u root -h localhost.localdomain password 'founder'
#mysql -uroot -pfounder mysql>use mysql; mysql>grant all on *.* to

[email protected]'%' identified by "founder"; mysql>FLUSH PRIVILEGES; mysql>exit; #cp /usr/share/mysql/my-small.cnf /etc/my.cnf


二.配置半同步模式的主從配置 1.半同步的配置： master>INSTALL PLUGIN rpl_semi_sync_master SONAME 'semisync_master.so'; master>SET GLOBAL rpl_semi_sync_master_enabled=1; master>SET GLOBAL rpl_semi_sync_master_timeout=10;
slave-x>INSTALL PLUGIN rpl_semi_sync_slave SONAME 'semisync_slave.so'; slave-x>SET GLOBAL rpl_semi_sync_slave_enabled=1;
On the master: [mysqld] rpl_semi_sync_master_enabled=1 rpl_semi_sync_master_timeout=10

On each slave: [mysqld] rpl_semi_sync_slave_enabled=1