1、基本环境：
Mysql版本：5.6.12-log
Percona-toolkit：2.2.18
Linux：centos6.5
2、安装
源码安装：
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# 一些依赖包 yum install perl perl-DBI perl-DBD-MySQL perl-IO-Socket-SSL perl-Time-HiRes -y # 下载安装percona-toolkit wget https://www.percona.com/downloads/percona-toolkit/2.2.18/tarball/percona-toolkit-2.2.18.tar.gz tar -xvf percona-toolkit_2.2.18.tar.gz cd percona-toolkit-2.2.18/ yum install perl-DBD-MySQL -y perl Makefile.PL make make test make install cp /usr/local/bin/pt* /bin/ |
Rpm包安装：
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wget https://www.percona.com/downloads/percona-toolkit/2.2.18/RPM/percona-toolkit-2.2.18-1.noarch.rpm |
报错记录：
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07-21T11:36:38 Error checksumming table business_db.SHOP_BARGAIN_RANGE: DBD::mysql::st execute failed: Unknown column ‘db’ in ‘where clause’ [for Statement “DELETE FROM `test`.`dsns` WHERE db = ? AND tbl = ?” with ParamValues: 0=’business_db’, 1=’SHOP_BARGAIN_RANGE’] at /usr/local/bin/pt-table-checksum line 10085. |
需要安装perl源组件：
yum -y install perl-devel
yum -y install perl-CPAN
3、建立check账号
赋予权限：
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mysql> grant SUPER on *.* to repl@’192.168.%’; Query OK, 0 rows affected (0.00 sec) mysql> mysql> grant PROCESS on *.* to repl@’192.168.%’; Query OK, 0 rows affected (0.00 sec) mysql> mysql> grant select,create,drop,insert,delete,update,alter on percona.* to repl@’192.168.%’; Query OK, 0 rows affected (0.00 sec) mysql> |
在主库建库建表：
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# 默认的check库 Create database percona; # 准备测试库数据 Create database bg; Use bg; CREATE TABLE `t1` ( `id` int(1) NOT NULL AUTO_INCREMENT, `cname` varchar(3) NOT NULL DEFAULT ”, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8; insert into t1 select 1,’abc’; # 然后单独在从库录入数据，那么主从数据不一致了，从库多了一条数据 Insert into t1 select 2,’ab2’; |
开始使用pt-table-checksum检查：
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# 执行checksum操作 [root@hch_test_dbm1_121_62 mysql]# pt-table-checksum –host=192.168.121.62 –port 3306 –databases=bg -urepl -pPlcc0805@replication –no-check-binlog-format [root@hch_test_dbm1_121_62 mysql]# # 没有check出来数据不一致的，why？ 去执行select * from checksums;也没有记录。 mysql> select * from percona.checksums; Empty set (0.00 sec) mysql> |
换个mysql主从环境进行测试：
pt-table-checksum –host=110.251.13.11 –port 3307 –databases=test-u check_user -pPlcc0805@replication –no-check-binlog-format
执行报错：
Diffs cannot be detected because no slaveswere found. Please read the–recursion-method documentation for information.
从字面意思上看是，主库找不到从数据库。只需要在从库配置文件 my.cnf中添加
report_host=slave_ip
report_port=slave_port
即可。
如果slave从库有表t3，master主库没有t3表，那么结果集上不会显示出来说从库多了个表t3，它以主master库为基准来判断验证的。
4、Test库能check，enrolment_db不能check
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# 开始检查test库的所有表 [root@azure_zhitian_dbm1_13_11 ~]# pt-table-checksum –host=110.251.13.11 –port 3307 –databases=test –user=check_user –password=”Plcc0805@replication” –no-check-binlog-format TS ERRORS DIFFS ROWS CHUNKS SKIPPED TIME TABLE 07-28T16:34:23 0 0 1 1 0 0.358 test.JBPM4_EXECUTION 07-28T16:34:23 0 1 2 1 0 0.038 test.t1 [root@azure_zhitian_dbm1_13_11 ~]# n 看到test.t1表的DIFFS为1，表示关于test.t1表的主从数据不一致，需要修复 # 再检查 enrolment_db库，没有记录，这是为啥？ [root@azure_zhitian_dbm1_13_11 ~]# pt-table-checksum –host=110.251.13.11 –port 3307 –databases=enrolment_db –user=check_user –password=”Plcc0805@replication” –chunk-size=100 –no-check-binlog-format [root@azure_zhitian_dbm1_13_11 ~]# |
