如何重建RAC的控制文件(四)

3. 设置cluster_database=false：
SQL> alter system set cluster_database=false scope=spfile;
System altered.

否则，在重建控制文件的时候会报下面的错误：

CREATE CONTROLFILE REUSE DATABASE "RACDB" RESETLOGS ARCHIVELOG
*
ERROR at line 1:
ORA-01503: CREATE CONTROLFILE failed
ORA-12720: operation requires database is in EXCLUSIVE mode

4. 停止所有数据库实例：
[oracle@rac1 trace]$ srvctl stop database -d RACDB
[oracle@rac1 trace]$ srvctl status database -d RACDB
Instance RACDB1 is not running on node rac1
Instance RACDB2 is not running on node rac2

5. 用resetlogs模式重建控制文件：

[oracle@rac1 trace]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Tue Jan 8 12:45:25 2013

Copyright (c) 1982, 2011, Oracle. All rights reserved.

Connected to an idle instance.

SQL> startup nomount;
ORACLE instance started.

Total System Global Area 739065856 bytes
Fixed Size 2232032 bytes
Variable Size 549454112 bytes
Database Buffers 184549376 bytes
Redo Buffers 2830336 bytes

SQL> CREATE CONTROLFILE REUSE DATABASE "RACDB" RESETLOGS ARCHIVELOG
2 MAXLOGFILES 192
3 MAXLOGMEMBERS 3
4 MAXDATAFILES 1024
5 MAXINSTANCES 32
6 MAXLOGHISTORY 292
7 LOGFILE
8 GROUP 1 (
9 '+DATA/racdb/onlinelog/group_1.261.783272805',
10 '+RECO/racdb/onlinelog/group_1.257.783272807'
11 ) SIZE 50M BLOCKSIZE 512,
12 GROUP 2 (
13 '+DATA/racdb/onlinelog/group_2.262.783272807',
14 '+RECO/racdb/onlinelog/group_2.258.783272809'
15 ) SIZE 50M BLOCKSIZE 512
16 -- STANDBY LOGFILE
17 DATAFILE
18 '+DATA/racdb/datafile/system.256.783272707',
19 '+DATA/racdb/datafile/sysaux.257.783272707',
20 '+DATA/racdb/datafile/undotbs1.258.783272707',
21 '+DATA/racdb/datafile/users.259.783272707',
22 '+DATA/racdb/datafile/example.264.783272831',
23 '+DATA/racdb/datafile/undotbs2.265.783273081'
24 CHARACTER SET AL32UTF8
25 ;

Control file created.

SQL> RECOVER DATABASE USING BACKUP CONTROLFILE UNTIL CANCEL; <=========必须使用UNTIL CANCEL，否则数据库无法open
ORA-00279: change 6976933 generated at 01/08/2013 12:45:12 needed for thread 1
ORA-00289: suggestion : +RECO
ORA-00280: change 6976933 for thread 1 is in sequence #2

Specify log: {=suggested | filename | AUTO | CANCEL}
CANCEL
Media recovery cancelled.

接下来需要 加其他thread，因为用resetlogs重建controlfile只是增加了thread为1的redo log：

SQL> ALTER DATABASE ADD LOGFILE THREAD 2
2 GROUP 3 (
3 '+DATA/racdb/onlinelog/group_3.269.804115405',
4 '+RECO/racdb/onlinelog/group_3.261.804115405'
5 ) SIZE 50M BLOCKSIZE 512 REUSE,
6 GROUP 4 (
7 '+DATA/racdb/onlinelog/group_4.270.804115405',
8 '+RECO/racdb/onlinelog/group_4.263.804115407'
9 ) SIZE 50M BLOCKSIZE 512 REUSE;
ALTER DATABASE ADD LOGFILE THREAD 2
*
ERROR at line 1:
ORA-01276: Cannot add file +DATA/racdb/onlinelog/group_3.269.804115405. File
has an Oracle Managed Files file name.

对于ASM，使用了OMF命名规则时不能指定具体的文件名，只需要指定diskgroup名即可：

SQL> ALTER DATABASE ADD LOGFILE THREAD 2
2 GROUP 3 (
3 '+DATA',
4 '+RECO'
5 ) SIZE 50M BLOCKSIZE 512 REUSE,
6 GROUP 4 (
7 '+DATA',
8 '+RECO'
9 ) SIZE 50M BLOCKSIZE 512 REUSE;

Database altered.

SQL> ALTER DATABASE OPEN RESETLOGS;

Database altered.

SQL> ALTER TABLESPACE TEMP ADD TEMPFILE '+DATA/racdb/tempfile/temp.263.783272821'
2 SIZE 39845888 REUSE AUTOEXTEND ON NEXT 655