mysql_tools_pt_percona_tookits

目录

1.下载安装

2.部分工具

　　　- pt-table-checksum

　　　- pt-table-sync

　　　- pt-pmp

 

1.下载安装

　下载地址：http://www.percona.com/software/percona-toolkit rpm安装包

　依赖：perl-IO

　安装：sudo rpm -ivh percona-toolkit-2.2.8-1.noarch.rpm

2.部分工具

　　　percona-toolkits是一个整合的安装包，包含很多小工具。详见http://www.percona.com/doc/percona-toolkit/2.2/，分不同小工具来测试

　pt-table-checksum

　　　作用：检查mysql主从数据是否一致

　　　用法：pt-table-checksum [OPTIONS] [DSN]

　　　参数：

　　　　u='',p='',h='127.0.0.1',P='3306',登陆参数，用户需要有

GRANT CREATE,SELECT,DELETE,UPDATE,INSERT, PROCESS, SUPER, REPLICATION SLAVE ON *.* TO 'repl'@'192.168.%' IDENTIFIED BY '123456';

　　　　--ask-pass：连接时手动输入密码

　　　　--[no]check-binlog-format：不检查主从服务器日志格式是否相同。默认检查。binlog-format是row，报错示例：

sudo /usr/bin/pt-table-checksum u=repl,P=3306,h=192.168.1.241,p='123456'

Replica hd-dm-test03 has binlog_format MIXED which could cause pt-table-checksum to break replication.  Please read "Replicas using row-based replication" in the LIMITATIONS section of the tool's documentation.  If you understand the risks, specify --no-check-binlog-format to disable this check.
Replica hd-dm-test02 has binlog_format MIXED which could cause pt-table-checksum to break replication.  Please read "Replicas using row-based replication" in the LIMITATIONS section of the tool's documentation.  If you understand the risks, specify --no-check-binlog-format to disable this check.

　　　　--check-interval：每次check的时间间隔，默认1s。

　　　　--[no]check-plan：检查计划，默认yes。

　　　　--[no]check-replication-filters：不检查复制过滤器，默认检查。需要设置启动--no-check-replication-filters ，启用--databases参数，指定检查的库

sudo /usr/bin/pt-table-checksum --no-check-binlog-format u=repl,P=3306,h=192.168.1.241,p='123456'
06-30T07:07:08 Replication filters are set on these hosts:
  hd-dm-test03
    replicate_ignore_db = mysql
  hd-dm-test02
    replicate_ignore_db = mysql
Please read the --check-replication-filters documentation to learn how to solve this problem. at /usr/bin/pt-table-checksum line 9535.

　　　　--check-slave-lag：

　　　　--replicate：输出结果至表checksums。缺少建表权限，删改查等权限，加上就行；

sudo /usr/bin/pt-table-checksum --no-check-binlog-format --no-check-replication-filters --databases=mydb --replicate=mydb.checksums u=repl,P=3306,h=192.168.1.241,p='123456'
06-30T07:15:01 --create-replicate-table failed: DBD::mysql::db do failed: CREATE command denied to user 'repl'@'192.168.1.241' for table 'checksums' at /usr/bin/pt-table-checksum line 11036.
06-30T07:15:01 --replicate table checksums does not exist and it cannot be created automatically.  You need to create the table.

　　　输出：

　　　　TS: 完成检测的时间；

　　　　ERRORS：检测过程碰到的错误数；

　　　　DIFFS：差异点

　　　　ROWS：表行数

　　　　CHUNKS：被划分到表中的块的数据，就是page

　　　　SKIPPED：由于错误或警告或过大，则跳过块的数目。

　　　　TIME：检查消耗的时间，单位s

　　　　TABLE：被检查的表名

            TS ERRORS  DIFFS     ROWS  CHUNKS SKIPPED    TIME TABLE
06-30T07:20:16      0      0        3       1       0   0.016 mydb.people
06-30T07:20:16      0      0        3       1       0   0.014 mydb.people2
06-30T07:20:16      0      0        3       1       0   0.015 mydb.people_car
06-30T07:20:16      0      0        3       1       0   0.014 mydb.people_car2
06-30T07:20:16      0      0        0       1       0   0.016 mydb.t2

查看表中数据：

　　　　db：库名，ta1：表名，chunk：表占用的page数，chunk_time：检查消耗的时间，chunk_index：检查的索引页，this_crc：从的校验码，master_crc：主的校验码，this_cnt：从的行数，master_cnt：主的行数，ts：检测完成的时间点

mysql> select * from checksums;
+------+-------------+-------+------------+-------------+----------------+----------------+----------+----------+------------+------------+---------------------+
| db   | tbl         | chunk | chunk_time | chunk_index | lower_boundary | upper_boundary | this_crc | this_cnt | master_crc | master_cnt | ts                  |
+------+-------------+-------+------------+-------------+----------------+----------------+----------+----------+------------+------------+---------------------+
| mydb | people      |     1 |   0.000785 | NULL        | NULL           | NULL           | 8255d963 |        3 | 8255d963   |          3 | 2014-06-30 07:20:16 |
| mydb | people2     |     1 |    0.00064 | NULL        | NULL           | NULL           | 8255d963 |        3 | 8255d963   |          3 | 2014-06-30 07:20:16 |
| mydb | people_car  |     1 |   0.000883 | NULL        | NULL           | NULL           | 4f6817d5 |        3 | 4f6817d5   |          3 | 2014-06-30 07:20:16 |
| mydb | people_car2 |     1 |   0.000696 | NULL        | NULL           | NULL           | 4f6817d5 |        3 | 4f6817d5   |          3 | 2014-06-30 07:20:16 |
| mydb | t2          |     1 |   0.000689 | NULL        | NULL           | NULL           | 0        |        0 | 0          |          0 | 2014-06-30 07:20:16 |
+------+-------------+-------+------------+-------------+----------------+----------------+----------+----------+------------+------------+---------------------+