dataguard rac到单机之间的switch over

搭建参见文章http://www.jb51.cc/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;