ORA-01618: redo thread 2 is not enabled - cannot mount 問題處理

今天在公司做oracle 10g rac 增加節點實驗，到最後一步新增例項到database中時，只分配一組redo給新加的例項2,導致例項不能啟動成功

   [oracle@p650:/oracle/app/oracle]$sqlplus / as sysdba

SQL*Plus: Release 10.2.0.4.0 - Production on Mon May 24 17:01:06 2010

Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.

Connected to an idle instance.

SQL> startup
ORACLE instance started.

Total System Global Area 1258291200 bytes
Fixed Size                  2083728 bytes
Variable Size             419431536 bytes
Database Buffers          822083584 bytes
Redo Buffers               14692352 bytes
ORA-01618: redo thread 2 is not enabled - cannot mount

檢查節點1正常例項

[oracle@p520:/crs/app/oracle/product/crs_1/opmn/conf]$sqlplus "/as sysdba"

SQL*Plus: Release 10.2.0.4.0 - Production on Mon May 24 17:01:21 2010

Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.

Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options

SQL> select * from v$log;

    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARC STATUS
---------- ---------- ---------- ---------- ---------- --- ----------------
FIRST_CHANGE# FIRST_TIME
------------- ------------
         1          1         51   52428800          1 NO  CURRENT
      1251966 24-MAY-10

         2          1         50   52428800          1 NO  INACTIVE
      1194389 20-MAY-10

         3          2          0   52428800          1 YES UNUSED
            0

發現thread 2 例項只有一組日誌

oracle 資料庫例項日誌組最少兩組，

在節點1對新增加的例項擴充套件日誌檔案

SQL> alter database add logfile thread 2 '/dev/rredo22_lv' size 50m;

Database altered.

SQL> alter database enable thread 2;

Database altered.

SQL> select member from v$logfile;

MEMBER
--------------------------------------------------------------------------------
/dev/rredo11_lv
/dev/rredo12_lv
/dev/rredo21_lv
/dev/rredo22_lv

 

新增後節點2例項就能正常mount和open了

[oracle@p650:/oracle/app/oracle/admin/orcl/bdump]$sqlplus / as sysdba

SQL*Plus: Release 10.2.0.4.0 - Production on Mon May 24 17:04:48 2010

Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.

Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options

SQL> alter database mount;

Database altered.

SQL> alter database open;

Database altered.

SQL>