1. 工具安装

yum install -y perl-DBI  perl-DBD-MySQL   perl-Time-HiRes  perl-IO-Socket-SSL perl-TermReadKey

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

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)