MySQL資料庫主從資料對比
阿新 • • 發佈:2021-08-22
1. 工具安裝
使用percona-Toolkit進行資料對比,因此先進行此工具的安裝 官方地址: https://www.percona.com/downloads/percona-toolkit 安裝依賴包yum install -y perl-DBI perl-DBD-MySQL perl-Time-HiRes perl-IO-Socket-SSL perl-TermReadKey安裝
rpm -ivh percona-toolkit-3.0.4-1.el6.x86_64.rpm
2.資料對比
pt-table-checksum --host=127.0.0.1--port 3306 --databases=test1 -uroot -ppass --no-check-binlog-format
過程如下:
[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 forinformation. # 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 120 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
簡介:
TS :完成檢查的時間。 ERRORS :檢查時候發生錯誤和警告的數量。 DIFFS :0表示一致,1表示不一致。當指定--no-replicate-check時,會一直為0,當指定--replicate-check-only會顯示不同的資訊。 ROWS :表的行數。 CHUNKS :被劃分到表中的塊的數目。 SKIPPED :由於錯誤或警告或過大,則跳過塊的數目。 TIME :執行的時間。 TABLE :被檢查的表名
如出現DIFFS不為0 的情況,即對應表主從資料不一致
3.資料修復
修復時使用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)