Oracle Dataguard备库失败与主库响应测试

　　在客户环境中，使用了Oracle 10.2.0.4 DataGuard技术，通过最大可用性模式进行数据保护。
　　以下简单测试，当备库关闭后，再重启备库，主库及备库的响应过程。

　　在备库执行如下步骤：

　　SQL> shutdown immediate;
　　ORA-01109: database not open
　　Database dismounted.
　　ORACLE instance shut down.
　　SQL> startup mount;
　　ORACLE instance started.
　　Total System Global Area 1610612736 bytes
　　Fixed Size 2084400 bytes
　　Variable Size 385876432 bytes
　　Database Buffers 1207959552 bytes
　　Redo Buffers 14692352 bytes
　　Database mounted.
　　SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;
　　Database altered.
　　SQL> exit

　　当备库关闭后，主库立即检测到备库的失败：

　　Tue Nov 17 20:34:58 2009
　　ARC1: Attempting destination LOG_ARCHIVE_DEST_2 network reconnect (3113)
　　ARC1: Destination LOG_ARCHIVE_DEST_2 network reconnect abandoned
　　PING[ARC1]: Error 3113 when pinging standby STANDBY.
　　Tue Nov 17 20:35:17 2009
　　LGWR: Attempting destination LOG_ARCHIVE_DEST_2 network reconnect (3113)
　　LGWR: Destination LOG_ARCHIVE_DEST_2 network reconnect abandoned
　　Tue Nov 17 20:35:17 2009
　　Errors in file /opt/oracle/admin/oradbt/bdump/oradbt_lgwr_319632.trc:
　　ORA-03113: end-of-file on communication channel
　　LGWR: Network asynch I/O wait error 3113 log 1 service 'STANDBY'
　　Tue Nov 17 20:35:17 2009
　　Destination LOG_ARCHIVE_DEST_2 is UNSYNCHRONIZED
　　LGWR: Failed to archive log 1 thread 1 sequence 3466 (3113)
　　Tue Nov 17 20:35:18 2009
　　LGWR: Closing remote archive destination LOG_ARCHIVE_DEST_2: 'STANDBY' (error 3113)
　　(oradbt)
　　Tue Nov 17 20:35:18 2009
　　Errors in file /opt/oracle/admin/oradbt/bdump/oradbt_lgwr_319632.trc:
　　ORA-01041: internal error. hostdef extension doesn't exist
　　LGWR: Error 1041 closing archivelog file 'STANDBY'
　　LGWR: Error 1041 disconnecting from destination LOG_ARCHIVE_DEST_2 standby host 'STANDBY'