Maatkit工具,Mysql自动检测数据一致性
[root@localhost ~]# perl -v
安装DBI 下载地址：
- [root@localhost ~]# wget http://ftp.cuhk.edu.hk/pub/packages/perl/CPAN/authors/id/T/TI/TIMB/DBI-1.616.tar.gz
- [root@localhost ~]# tar zxvf DBI-1.616.tar.gz
- [root@localhost ~]# cd DBI-1.616
- [root@localhost ~]# perl Makefile.PL
- [root@localhost DBI-1.616]# make
- [root@localhost DBI-1.616]# make install
安装DBD-mysql 下载地址：http://search.cpan.org/dist/DBD-mysql/
- [root@localhost ~]# wget http://search.cpan.org/CPAN/authors/id/C/CA/CAPTTOFU/DBD-mysql-4.019.tar.gz
- [root@localhost ~]# tar zxvf DBD-mysql-4.019.tar.gz
- [root@localhost ~]# cd DBD-mysql-4.019
[root@localhost ~]# wget http://search.cpan.org/CPAN/authors/id/C/CA/CAPTTOFU/DBD-mysql-4.019.tar.gz [root@localhost ~]# tar zxvf DBD-mysql-4.019.tar.gz [root@localhost ~]# cd DBD-mysql-4.019
[root@localhost DBD-mysql-4.019]# perl Makefile.PL --mysql_config=/usr/local/mysql/bin/mysql_config
[root@localhost DBD-mysql-4.019]# make
[root@localhost DBD-mysql-4.019]# make test
[root@localhost DBD-mysql-4.019]# make
[root@localhost DBD-mysql-4.019]# make install
安装maatkit 下载地址： http://www.maatkit.org/
wget http://maatkit.googlecode.com/files/maatkit-7540.tar.gz
tar zxvf maatkit-7540.tar.gz
cd maatkit-7540
perl Makefile.PL
make install
- [root@localhost ~]# mk-
[root@localhost ~]# mk-
- mk-archiver mk-index-usage mk-query-advisor mk-table-checksum
- mk-checksum-filter mk-kill mk-query-digest mk-table-sync
- mk-config-diff mk-loadavg mk-query-profiler mk-table-usage
- mk-deadlock-logger mk-log-player mk-show-grants mk-tcp-model
- mk-duplicate-key-checker mk-merge-mqd-results mk-slave-delay mk-upgrade
- mk-error-log mk-parallel-dump mk-slave-find mk-variable-advisor
- mk-fifo-split mk-parallel-restore mk-slave-move mk-visual-explain
- mk-find mk-profile-compact mk-slave-prefetch
- mk-heartbeat mk-purge-logs mk-slave-restart
我们在从库上运行
[root@vm01 ~]# mk-table-sync --execute --print --no-check-slave --databases test h=192.168.8.23,u=admin,p=123456 h=192.168.8.22,u=admin,p=123456
DELETE FROM `test`.`heartbeat` WHERE `server_id`='11' LIMIT 1 /*maatkit src_db:test src_tbl:heartbeat src_dsn:h=192.168.8.23,p=...,u=admin dst_db:test dst_tbl:heartbeat dst_dsn:h=192.168.8.22,p=...,u=admin lock:0 transaction:0 changing_src:0 replicate:0 bidirectional:0 pid:4176 user:root host:vm01*/;
DELETE FROM `test`.`t1` WHERE `id`='22' LIMIT 1 /*maatkit src_db:test src_tbl:t1 src_dsn:h=192.168.8.23,p=...,u=admin dst_db:test dst_tbl:t1 dst_dsn:h=192.168.8.22,p=...,u=admin lock:0 transaction:1 changing_src:0 replicate:0 bidirectional:0 pid:4176 user:root host:vm01*/;
INSERT INTO `test`.`t1`(`id`) VALUES ('2') /*maatkit src_db:test src_tbl:t1 src_dsn:h=192.168.8.23,p=...,u=admin dst_db:test dst_tbl:t1 dst_dsn:h=192.168.8.22,p=...,u=admin lock:0 transaction:1 changing_src:0 replicate:0 bidirectional:0 pid:4176 user:root host:vm01*/;
[root@vm01 ~]#
这里要说明一下，主从数据库表和表结构必须一致,否则会报错,,,--no-check-slave这个参数，如果你不加这个参数，会提示报错，因为这个工具默认是不允许在从库上修改数据的，但我们这里为了不在主库上dump出来，再到从库上导入进去，加了这个参数。
它的工作原理是：先一行一行检查主从库的表是否一样，如果哪里不一样，就执行删除，更新，插入等操作，使其达到一致。
这时，我们在检查下主从表的完整性、一致性
在主库上运行
[root@vm02 ~]# mk-table-checksum h=localhost,u=root,p=123456 h=192.168.8.22,u=admin,p=123456 -d test
DATABASE TABLE CHUNK HOST ENGINE COUNT CHECKSUM TIME WAIT STAT LAG
test heartbeat 0 localhost MyISAM NULL 3258230607 0 0 NULL NULL
test heartbeat 0 192.168.8.22 MyISAM NULL 3258230607 0 0 NULL NULL
test t1 0 localhost InnoDB NULL 1245381782 0 0 NULL NULL
test t1 0 192.168.8.22 InnoDB NULL 1245381782 0 0 NULL NULL
test t2 0 localhost InnoDB NULL 251493421 0 0 NULL NULL
test t2 0 192.168.8.22 InnoDB NULL 251493421 0 0 NULL NULL
[root@vm02 ~]#
[root@vm02 ~]# mk-table-checksum h=localhost,u=root,p=123456 h=192.168.8.22,u=admin,p=123456 -d test | mk-checksum-filter
[root@vm02 ~]#
可以看到，主从库的表数据已经完全一样了。