Oracle 11G Physical Standby Database Active Data Guard Switchover & Failover
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Data guard的正常切换为switchover,非正常的切换为failover。
1,Phyiscal standby database之active data guard switchover
主库:DGDB
备库:DGDBST
参考官方: http://docs.oracle.com/cd/E11882_01/server.112/e41134/role_management.htm#SBYDB00620
switchover之前的检查DGDB> SELECT SWITCHOVER_STATUS FROM V$DATABASE;SWITCHOVER_STATUS--------------------TO STANDBYDGDBST> SELECT SWITCHOVER_STATUS FROM V$DATABASE;SWITCHOVER_STATUS--------------------NOT ALLOWED
切换步骤DGDB> SELECT SWITCHOVER_STATUS FROM V$DATABASE;DGDBST> SELECT SWITCHOVER_STATUS FROM V$DATABASE;DGDB> ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY WITH SESSION SHUTDOWN;DGDB> shutdown abort;DGDB> startup mount;DGDBST> SELECT SWITCHOVER_STATUS FROM V$DATABASE;DGDBST> ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY WITH SESSION SHUTDOWN;DGDBST> ALTER DATABASE OPEN;DGDB> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT FROM SESSION;
2,Phyiscal standby database之active data guard failover
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