[转载]mysqlhotcopy 热备工具体验与总结

Heim

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[转载]mysqlhotcopy 热备工具体验与总结_MySQL

Jun 01, 2016 pm 01:51 PM

今天有空尝试了一下MYSQLHOTCOPY这个快速热备MYISAM引擎的工具。 (本文是针对单个服务器的情况，以后将会加入多服务器相关操作) 他和MYSQLDUMP的比较： 1、前者是一个快速文件意义上的COPY，后者是一个数据库端的SQL语句集合。 2、前者只能运行在数据库目录所在的机器上，后者可以用在远程客户端。 3、相同的地方都是在线执行LOCK TABLES 以及 UNLOCK TABLES 4、前者恢复只需要COPY备份文件到源目录覆盖即可，后者需要倒入SQL文件到原来库中。(source 或者/.或者 mysql 用MYSQLHOTCOPY备份的步骤： 1、有没有PERL-DBD模块安装 我的机器上： [root@localhost data]# rpm -qa |grep perl-DBD | grep MySQL perl-DBD-MySQL-3.0007-1.fc6 2、在数据库段分配一个专门用于备份的用户 mysql> grant select,reload,lock tables on *.* to 'hotcopyer'@'localhost' identified by '123456'; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) 3、在/etc/my.cnf或者登陆用户的个人主文件.my.cnf里面添加 [mysqlhotcopy] interactive-timeout user=hotcopyer password=123456 port=3306 4、开始备份。 [root@localhost ~]# mysqlhotcopy t_girl t_girl_new Locked 4 tables in 0 seconds. Flushed tables (`t_girl`.`category`, `t_girl`.`category_part`, `t_girl`.`id`, `t_girl`.`parent`) in 0 seconds. Copying 22 files... Copying indices for 0 files... Unlocked tables. mysqlhotcopy copied 4 tables (22 files) in 5 seconds (5 seconds overall). 备份后的目录： [root@localhost data]# du -h | grep t_girl 213M ./t_girl 213M ./t_girl_copy [root@localhost ~]# 5、MYSQLHOTCOPY用法详解。 1)、mysqlhotcopy 原数据库名，新数据库名 [root@localhost ~]# mysqlhotcopy t_girl t_girl_new Locked 4 tables in 0 seconds. Flushed tables (`t_girl`.`category`, `t_girl`.`category_part`, `t_girl`.`id`, `t_girl`.`parent`) in 0 seconds. Copying 22 files... Copying indices for 0 files... Unlocked tables. mysqlhotcopy copied 4 tables (22 files) in 5 seconds (5 seconds overall). 2)、mysqlhotcopy 原数据库名，备份的目录 [root@localhost ~]# mysqlhotcopy t_girl /tmp/ Locked 4 tables in 0 seconds. Flushed tables (`t_girl`.`category`, `t_girl`.`category_part`, `t_girl`.`id`, `t_girl`.`parent`) in 0 seconds. Copying 22 files... Copying indices for 0 files... Unlocked tables. mysqlhotcopy copied 4 tables (22 files) in 6 seconds (6 seconds overall). 3)、对单个表支持正则表达式 (除了id 表外) [root@localhost data]# mysqlhotcopy t_girl./~id/ Using copy suffix '_copy' Locked 3 tables in 0 seconds. Flushed tables (`t_girl`.`category`, `t_girl`.`category_part`, `t_girl`.`parent`) in 0 seconds. Copying 19 files... Copying indices for 0 files... Unlocked tables. mysqlhotcopy copied 3 tables (19 files) in 6 seconds (6 seconds overall). [root@localhost data]# 4)、可以把记录写到专门的表中。具体察看帮助。 perldoc mysqlhostcopy mysql> create database hotcopy; Query OK, 1 row affected (0.03 sec) mysql> use hotcopy Database changed mysql> create table checkpoint(time_stamp timestamp not null,src varchar(32),dest varchar(60), msg varchar(255)); Query OK, 0 rows affected (0.01 sec) 同时记得给hotcopyer用户权限。 mysql> grant insert on hotcopy.checkpoint to hotcopyer@'localhost'; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) mysql> /q Bye 重复第三步的操作 [root@localhost ~]# mysqlhotcopy t_girl./~id/ --allowold --checkpoint hotcopy.checkpoint Using copy suffix '_copy' Existing hotcopy directory renamed to '/usr/local/mysql/data/t_girl_copy_old' Locked 3 tables in 0 seconds. Flushed tables (`t_girl`.`category`, `t_girl`.`category_part`, `t_girl`.`parent`) in 0 seconds. Copying 19 files... Copying indices for 0 files... Unlocked tables. mysqlhotcopy copied 3 tables (19 files) in 12 seconds (13 seconds overall). 默认保存在数据目录下/t_girl_copy/ 看看记录表。 mysql> use hotcopy; Database changed mysql> select * from checkpoint; +---------------------+--------+-----------------------------------+-----------+ | time_stamp | src | dest | msg | +---------------------+--------+-----------------------------------+-----------+ | 2008-03-11 14:44:58 | t_girl | /usr/local/mysql/data/t_girl_copy | Succeeded | +---------------------+--------+-----------------------------------+-----------+ 1 row in set (0.00 sec) 5)、支持增量备份。 [root@localhost ~]# mysqlhotcopy t_girl./~id/ --allowold --checkpoint hotcopy.checkpoint --addtodest t_girl_new Locked 3 tables in 0 seconds. Flushed tables (`t_girl`.`category`, `t_girl`.`category_part`, `t_girl`.`parent`) in 0 seconds. Copying 19 files... Copying indices for 0 files... Unlocked tables. mysqlhotcopy copied 3 tables (19 files) in 7 seconds (7 seconds overall). 6)、其它的等待测试过了再发布。。。

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