dataguard rac到单机之间的switch over

搭建参见文章http://www.52php.cn/article/p-yvzgbjsu-bqm.html,搭好后，做switch over:

1 检查参数fal_server,fal_client,log_archive_dest_2,log_file_name_convert,data_file_name_convert,

standby_file_management

源：

fal_server=standby

fal_cleint=db

altersystemsetdb_file_name_convert='/data','+data'scope=spfile;
altersystemsetlog_file_name_convert='/data','+data'scope=spfile;

standby:

fal_server=db

fal_client=standby

standby_file_management=auto

2 切换前rac需关闭至一个实例

3 检查是否有gap

4 切换：

源：

SQL>alterdatabasecommittoswitchovertostandbywithsessionshutdown;

这里切换后，源端全自动shutdown abort;

--standby

SQL>selectname,open_mode,DATABASE_ROLE,PROTECTION_MODE,switchover_statusfromv$database;
NAMEOPEN_MODEDATABASE_ROLEPROTECTION_MODESWITCHOVER_STATUS
-------------------------------------------------------------------------------------
DBREADONLYWITHAPPLYPHYSICALSTANDBYMAXIMUMAVAILABILITYTOPRIMARY

SQL>altersystemsetlog_archive_dest_2="service=dblgwrsyncaffirmvalid_for=(all_logfiles,all_roles)db_unique_name=db"scope=both;
SQL>altersystemsetlog_archive_dest_state_2=enable;
SQL>alterdatabasecommittoswitchovertoprimarywithsessionshutdown;

--源

SQL>startupmount
SQL>altersystemsetlog_archive_dest_state_2=defer;
SQL>selectname,LOG_MODE,OPEN_MODE,database_role,SWITCHOVER_STATUS,db_unique_namefromv$database
NAMELOG_MODEOPEN_MODEDATABASE_ROLESWITCHOVER_STATUSDB_UNIQUE_NAME
-----------------------------------------------------------------------------------------------------------
DBARCHIVELOGMOUNTEDPHYSICALSTANDBYRECOVERYNEEDEDdb
SQL>alterdatabaserecovermanagedstandbydatabasecancel;
SQL>alterdatabaSEOpen;
SQL>alterdatabaserecovermanagedstandbydatabaseusingcurrentlogfiledisconnect;
SQL>selectname,db_unique_namefromv$database;
NAMELOG_MODEOPEN_MODEDATABASE_ROLESWITCHOVER_STATUSDB_UNIQUE_NAME
-----------------------------------------------------------------------------------------------------------
DBARCHIVELOGREADONLYWITHAPPLYPHYSICALSTANDBYTOPRIMARYdb

--standby

SQL>altersystemsetlog_archive_dest_2="service=dblgwrsyncaffirmvalid_for=(all_logfiles,all_roles)db_unique_name=db"scope=both;

SQL>altersystemsetlog_archive_dest_state_2=enablescope=both;

（编辑：李大同）

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