载]mysqlhotcopy 热备工具体验与总结

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。
[[email protected] ~]# 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：
[[email protected] data]# du -h | grep t_girl

213M ./t_girl
213M ./t_girl_copy
[[email protected] ~]#

5、MYSQLHOTCOPY用法详解。
1)、mysqlhotcopy 原数据库名，新数据库名
[[email protected] ~]# 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
[[email protected] ~]# 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)
[[email protected] 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).
[[email protected] 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 [email protected]‘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

[[email protected] ~]# 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。
[[email protected] ~]# mysqlhotcopy t_girl./~id/ --allowold --checkpoint hotcopy.checkpoint --addtodest t_girl_new