MySQL数据库主从数据对比
1. 工具安装
使用percona-Toolkit进行数据对比,因此先进行此工具的安装
官方地址:
https://www.percona.com/downloads/percona-toolkit
安装依赖包
yum install -y perl-DBI perl-DBD-MySQL perl-Time-HiRes perl-IO-Socket-SSL perl-TermReadKey
安装
rpm -ivh percona-toolkit-3.0.4-1.el6.x86_64.rpm
2.数据对比
pt-table-checksum --host=127.0.0.1--port 3306 --databases=test1 -uroot -ppass --no-check-binlog-format
过程如下:
[root@mysql1 ~]# pt-table-checksum --host=127.0.0.1 --port 3346 --databases=test1 -uroot -ppass --no-check-binlog-format Diffs cannot be detected because no slaves were found. Please read the --recursion-method documentation for information. # A software update is available: TS ERRORS DIFFS ROWS CHUNKS SKIPPED TIME TABLE 08-19T00:05:20 0 0 9759 4 0 0.742 test1.COST_RISKFREE 08-19T00:05:20 0 0 17862 1 0 0.349 test1.FFUT_QUOTATION 08-19T00:05:27 0 0 461012 12 0 6.714 test1.STK_MKT_QUOTATION 08-19T00:05:27 0 0 20 1 0 0.177 test1.e 08-19T00:05:27 0 0 1 1 0 0.171 test1.heartbeat 08-19T00:05:28 0 0 1 1 0 0.175 test1.test_int You have new mail in /var/spool/mail/root
简介:
TS :完成检查的时间。 ERRORS :检查时候发生错误和警告的数量。 DIFFS :0表示一致,1表示不一致。当指定--no-replicate-check时,会一直为0,当指定--replicate-check-only会显示不同的信息。 ROWS :表的行数。 CHUNKS :被划分到表中的块的数目。 SKIPPED :由于错误或警告或过大,则跳过块的数目。 TIME :执行的时间。 TABLE :被检查的表名
如出现DIFFS不为0 的情况,即对应表主从数据不一致
3.数据修复
修复时使用pt-table-sync工具
pt-table-sync --execute --databases=test1 --tables=COST_RISKFREE --replicate percona.checksums --sync-to-master h=106.14.184.46,u=root,p=123456 # TableChecksum:4998 5214 SELECT db, tbl, CONCAT(db, '.', tbl) AS `table`, chunk, chunk_index, lower_boundary, upper_boundary, COALESCE(this_cnt-master_cnt, 0) AS cnt_diff, COALESCE(this_crc <> master_crc OR ISNULL(master_crc) <> ISNULL(this_crc), 0) AS crc_diff, this_cnt, master_cnt, this_crc, master_crc FROM percona.checksums WHERE master_cnt <> this_cnt OR master_crc <> this_crc OR ISNULL(master_crc) <> ISNULL(this_crc) # TableChecksum:4998 5214 SELECT db, tbl, CONCAT(db, '.', tbl) AS `table`, chunk, chunk_index, lower_boundary, upper_boundary, COALESCE(this_cnt-master_cnt, 0) AS cnt_diff, COALESCE(this_crc <> master_crc OR ISNULL(master_crc) <> ISNULL(this_crc), 0) AS crc_diff, this_cnt, master_cnt, this_crc, master_crc FROM percona.checksums WHERE master_cnt <> this_cnt OR master_crc <> this_crc OR ISNULL(master_crc) <> ISNULL(this_crc) # SchemaIterator:7923 5214 Table heartbeat is not in --tables list, ignoring # pt_table_sync:10262 5214 No checksum differences # pt_table_sync:11128 5214 Disconnected dbh DBI::db=HASH(0x2c229e0) # pt_table_sync:11128 5214 Disconnected dbh DBI::db=HASH(0x25c18e0) # pt_table_sync:11128 5214 Disconnected dbh DBI::db=HASH(0x25c1e80) # pt_table_sync:11128 5214 Disconnected dbh DBI::db=HASH(0x25c1610)