多源複製的意義mysql
1.能夠在一個從庫上對多個服務器的數據庫進行彙總,或者對一個數據庫的分庫分表進行彙總。sql
2.集約使用從庫服務器的硬件資源,畢竟弱一個數據庫業務量較小確佔用整個服務器資源是不經濟的。數據庫
3.更方便的對個業務庫進行數據備份,優化數據庫備份腳本編寫邏輯centos
拓補圖bash
實施步驟服務器
1.備份主庫上的數據,考慮到gtid的問題建議只採用mysqldump程序進行備份less
centos:#mysqldump --login-path=3306 \ #mysql官方工具都支持login-path快速登陸 --single-transaction \ #事務一致性備份,防止備份完整性被事務一致性破壞 --master-data=2 \ #在備份文件的頭部加一句change master to pos的註釋語句 -A >ip06p3306.sql #備份全部數據庫
2.將導出的文件傳輸到從庫的服務器上ide
centos_ip06:#scp ip06p3306.sql root@192.168.1.11:/root/ centos_ip31:#scp ip31p3306.sql root@192.168.1.11:/root/
3.將主庫的備份文件導入到從庫上工具
centos:#mysql --login-path=3306 \ -f <ip06p3306.sql #-f參數,忽略應用備份時產生的GTID衝突
4.從兩份備份文件的頭部查看兩個主庫備份時執行到的GTID post
centos:#less ip06p3306.sql|grep PURGED #獲得GTID_ip06 centos:#less ip31p3306.sql|grep PURGED #獲得GTID_ip31
5.從新設置從庫的GTID(在從庫上執行)
mysql>reset master; mysql>set global gtid_purged='GTID_ip06,GTID_ip31';
6.將從庫的指向各自的主庫
mysql>change master to \ master_host='192.168.1.6',master_port=3306,\ master_user='repl',master_password='123456', \ master_auto_postion=1 \自動對齊GTID,從庫宕機重啓後,刪除未執行relaylog,從新拉取 for channel 'master_3306';爲這個主設定一個頻道名,可設爲易於辨認的名字
7.設置不方便同步的庫:(如會致使複製出重複用戶的mysql庫)
但sys,performance,information爲模式或者視圖同樣的存在,數據在讀取時即時生成,不真正存儲數據,能夠不過濾
mysql>stop slave sql_thread;#中止從庫的重放進程,比中止整個從庫要方便的多 mysql>change replication filter \ replicate_ignore_db=(mysql,db1);\#把複製的庫放在括號裏,並用,分隔 mysql>start slave sql_thread;
8.查看信息:
mysql> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.1.6 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000016 Read_Master_Log_Pos: 194 Relay_Log_File: localhost-relay-bin-master_3306.000033 Relay_Log_Pos: 367 Relay_Master_Log_File: mysql-bin.000016 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 194 Relay_Log_Space: 803 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 13306 Master_UUID: 449fdd93-1b80-11e7-b054-000c29aa1d65 Master_Info_File: mysql.slave_master_info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: 066c3194-2b4b-11e7-b67b-000c290b6ef0:1-2951823, 449fdd93-1b80-11e7-b054-000c29aa1d65:1-140, efa1d12e-3c56-11e7-a99e-000c29ba498d:1-481 Auto_Position: 1 Replicate_Rewrite_DB: Channel_Name: master_3306 Master_TLS_Version: *************************** 2. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.1.31 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000026 Read_Master_Log_Pos: 375018221 Relay_Log_File: localhost-relay-bin-master_zabbix.000032 Relay_Log_Pos: 375018394 Relay_Master_Log_File: mysql-bin.000026 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 375018221 Relay_Log_Space: 375018619 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 313306 Master_UUID: 066c3194-2b4b-11e7-b67b-000c290b6ef0 Master_Info_File: mysql.slave_master_info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: 066c3194-2b4b-11e7-b67b-000c290b6ef0:2310554-2951823 Executed_Gtid_Set: 066c3194-2b4b-11e7-b67b-000c290b6ef0:1-2951823, 449fdd93-1b80-11e7-b054-000c29aa1d65:1-140, efa1d12e-3c56-11e7-a99e-000c29ba498d:1-481 Auto_Position: 1 Replicate_Rewrite_DB: Channel_Name: master_zabbix Master_TLS_Version: 2 rows in set (0.01 sec)