mysqldiff该工具是官方mysql-utilities工具集的一个脚本，可以实现主从服务器表结构是否一致。数据校验需要使用Percona的pt-table-checksum工具。
安装：
# tar zxvf mysql-utilities-1.5.4.tar.gz # cd mysql-utilities-1.5.4 # python setup.py install
使用方法：
mysqldiff --server1=admin:123456@192.168.79.10 --server2=admin:123456@192.168.79.11 --difftype=differ test:test # WARNING: Using a password on the command line interface can be insecure. # server1 on 192.168.79.10: ... connected. # server2 on 192.168.79.11: ... connected. # Comparing `test` to `test` [PASS] # Comparing `test`.`t1` to `test`.`t1` [FAIL] # Object definitions differ. (--changes-for=server1) # CREATE TABLE `t1` ( `id` int(11) DEFAULT NULL, - `name` char(4) DEFAULT NULL ? ^ + `name` char(16) DEFAULT NULL ? ^^ ) ENGINE=InnoDB DEFAULT CHARSET=utf8 Compare failed. One or more differences found.
很直观的找出不一样的地方。
如果你想打印出修改表结构的语句，如下：
# mysqldiff --server1=admin:123456@192.168.79.10 --server2=admin:123456@192.168.79.11 --difftype=sql test:test # WARNING: Using a password on the command line interface can be insecure. # server1 on 192.168.79.10: ... connected. # server2 on 192.168.79.11: ... connected. # Comparing `test` to `test` [PASS] # Comparing `test`.`t1` to `test`.`t1` [FAIL] # Transformation for --changes-for=server1: # ALTER TABLE `test`.`t1` CHANGE COLUMN name name char(16) NULL; Compare failed. One or more differences found.
