标签：Switchover status SWITCHOVER database Standby Database standby SQL switchover
状态列表:
In Oracle documentation explain SWITCHOVER_STATUS column of v$database can have the following values:
NOT ALLOWED – Either this is a standby database and the primary database has not been switched first, or this is a primary database and there are no standby databases.
SESSIONS ACTIVE – Indicates that there are active SQL sessions attached to the primary or standby database that need to be disconnected before the switchover operation is permitted.
SWITCHOVER PENDING – This is a standby database and the primary database switchover request has been received but not processed.
SWITCHOVER LATENT – The switchover was in pending mode, but did not complete and went back to the primary database.
TO PRIMARY – This is a standby database, with no active sessions, that is allowed to switch over to a primary database.
TO STANDBY – This is a primary database, with no active sessions, that is allowed to switch over to a standby database.
RECOVERY NEEDED – This is a standby database that has not received the switchover request.
解决:
SQL> select name,database_role,switchover_status from v$database; NAME DATABASE_ROLE SWITCHOVER_STATUS --------------------------- ------------------------------------------------ ------------------------------------------------------------ MTXDB PHYSICAL STANDBY NOT ALLOWED SQL> select PROCESS, STATUS, GROUP#, SEQUENCE#, BLOCK#, BLOCKS from v$managed_standby; PROCESS STATUS GROUP# SEQUENCE# BLOCK# BLOCKS --------------------------- ------------------------------------ ------------------------------------------------------------------------------------------------------------------------ ---------- ---------- ---------- ARCH CONNECTED N/A 0 0 0 DGRD ALLOCATED N/A 0 0 0 DGRD ALLOCATED N/A 0 0 0 ARCH CONNECTED N/A 0 0 0 ARCH CONNECTED N/A 0 0 0 ARCH CONNECTED N/A 0 0 0 MRP0 APPLYING_LOG N/A 57 2346 409600 RFS IDLE N/A 0 0 0 RFS IDLE 2 57 2346 1 9 rows selected. SQL> select database_role,switchover_status from v$database; DATABASE_ROLE SWITCHOVER_STATUS ------------------------------------------------ ------------------------------------------------------------ PHYSICAL STANDBY NOT ALLOWED SQL> alter database recover managed standby database finish force; Database altered. SQL> select database_role,switchover_status from v$database; DATABASE_ROLE SWITCHOVER_STATUS ------------------------------------------------ ------------------------------------------------------------ PHYSICAL STANDBY TO PRIMARY SQL> shutdown immediate; ORA-01109: database not open Database dismounted. ORACLE instance shut down. SQL> startup; ORACLE instance started. Total System Global Area 2466250400 bytes Fixed Size 9137824 bytes Variable Size 536870912 bytes Database Buffers 1912602624 bytes Redo Buffers 7639040 bytes Database mounted. Database opened. SQL> alter database recover managed standby database disconnect from session; Database altered. SQL> select database_role,switchover_status from v$database; DATABASE_ROLE SWITCHOVER_STATUS ------------------------------------------------ ------------------------------------------------------------ PHYSICAL STANDBY TO PRIMARY
产生DataGuard ora-16157故障:
关于这个问题,oracle 官方的回答是要重装DG,考虑实际情况,alter database recover managed standby database finish force 之后,系统没有更改,只需要在nomount 备库之后,在主库产生standby backup control file,然后在备机用些控制文件加载就可以了,测试通过.
在主库
SQL> alter system archive log current;
System altered.
SQL> alter system checkpoint;
System altered.
SQL> SELECT UNIQUE THREAD#, MAX(SEQUENCE#) OVER(PARTITION BY THREAD#) LAST FROM v$archived_log;
THREAD# LAST
---------- ----------
1 66
SQL> ALTER DATABASE CREATE standby CONTROLFILE AS '/tmp/controlfs01.ctl';
Database altered.
--scp到备库
在备库:
SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. SQL> startup mount; ORACLE instance started.
标签：Switchover,status,SWITCHOVER,database,Standby,Database,standby,SQL,switchover 来源： https://www.cnblogs.com/tingxin/p/13200857.html
本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享； 2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关； 3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关； 4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除； 5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。