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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 TABLES4、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 < 备份文件)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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