Oracle Study-Oracle RAC reconstruction Control File

Oracle Study-Oracle RAC reconstruction Control File

System Environment:
Operating System: AIX5.3

Cluster: Oracle 10gR2 CRS
Oracle: Oracle 10gR2

Rebuild the control file in the RAC environment is similar to that in a single instance, but note the following steps:
[Oracle @ aix211 ~] $ Cat mkln. sh
Ln-s/dev/rsystem/u01/app/oracle/oradata/prod/system01.dbf
Ln-s/dev/rsysaux/u01/app/oracle/oradata/prod/sysaux01.dbf
Ln-s/dev/rusers/u01/app/oracle/oradata/prod/users01.dbf
Ln-s/dev/rundotbs1/u01/app/oracle/oradata/prod/undotbs01.dbf
Ln-s/dev/rundotbs2/u01/app/oracle/oradata/prod/undotbs02.dbf
Ln-s/dev/rtemp/u01/app/oracle/oradata/prod/temp01.dbf
Ln-s/dev/rcontrol1_1/u01/app/oracle/oradata/prod/control01.ctl
Ln-s/dev/rcontrol2_2/u01/app/oracle/oradata/prod/control02.ctl
Ln-s/dev/rcontrol3_3/u01/app/oracle/oradata/prod/control03.ctl
Ln-s/dev/rredo1_1/u01/app/oracle/oradata/prod/log11.log
Ln-s/dev/rredo1_2/u01/app/oracle/oradata/prod/log12.log
Ln-s/dev/rredo2_1/u01/app/oracle/oradata/prod/log21.log
Ln-s/dev/rredo2_2/u01/app/oracle/oradata/prod/log22.log
Ln-s/dev/rindex/u01/app/oracle/oradata/prod/index01.dbf
Ln-s/dev/rspfile/u01/app/oracle/oradata/prod/spfile01
Ln-s/dev/rexample/u01/app/oracle/oradata/prod/example01.dbf

The Database is stored in RAW.

1. First back up controlfile on a node

[Oracle @ aix201 ~] $ Sqlplus '/as sysdba'
SQL * Plus: Release 10.2.0.1.0-Production on Mon Mar 23 16:16:07 2015
Copyright (c) 1982,200 5, Oracle. All rights reserved.
Connected:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0-64bit Production
With the Partitioning, Real Application Clusters, OLAP and Data Mining options

SQL> select status from v $ instance;
STATUS
------------
OPEN
SQL> alter database backup controlfile to trace;
Database altered.

2. View trace backup of control files (udump)
Create controlfile reuse database "PROD" NORESETLOGS NOARCHIVELOG
# MAXLOGFILES 192
MAXLOGMEMBERS 3
MAXDATAFILES 1024
MAXINSTANCES 32
# MAXLOGHISTORY 292
LOGFILE
GROUP 1'/u01/app/oracle/oradata/prod/log11.log' SIZE 50 M,
GROUP 2'/u01/app/oracle/oradata/prod/log12.log 'SIZE 50 M,
GROUP 3 '/u01/app/oracle/oradata/prod/log21.log' SIZE 50 M,
GROUP 4'/u01/app/oracle/oradata/prod/log22.log 'SIZE 50 M
-- STANDBY LOGFILE
DATAFILE
'/U01/app/oracle/oradata/prod/system01.dbf ',
'/U01/app/oracle/oradata/prod/undotbs01.dbf ',
'/U01/app/oracle/oradata/prod/sysaux01.dbf ',
'/U01/app/oracle/oradata/prod/users01.dbf ',
'/U01/app/oracle/oradata/prod/example01.dbf ',
'/U01/app/oracle/oradata/prod/undotbs02.dbf'
Character set ZHS16GBK
;

3. Close the database, start one of the instances to mount
SQL> startup nomount;
ORACLE instance started.
Total System Global Area 612368384 bytes
Fixed Size 2022832 bytes
Variable Size 184549968 bytes
Database Buffers 423624704 bytes
Redo Buffers 2170880 bytes

SQL> @/home/oracle/cr_ctr. SQL
Create controlfile reuse database "PROD" NORESETLOGS NOARCHIVELOG
*
ERROR at line 1:
ORA-01503: create controlfile failed
ORA-12720: operation requires database is in EXCLUSIVE mode
SQL> show parameter cluster
NAME TYPE VALUE
-----------------------------------------------------------------------------
Cluster_database boolean TRUE
Cluster_database_instances integer 2
Cluster_interconnects string

--- Creation failed because the control file under RAC is in share mode and needs to be started to exclusive mode before reconstruction; Modify cluster_database to false and then recreate

Recreate the control file:
SQL> alter system set cluster_database = false scope = spfile;
System altered.
SQL> startup nomount
ORACLE instance started.
Total System Global Area 612368384 bytes
Fixed Size 2022832 bytes
Variable Size 184549968 bytes
Database Buffers 423624704 bytes
Redo Buffers 2170880 bytes

SQL> show parameter cluster
NAME TYPE VALUE
-----------------------------------------------------------------------------
Cluster_database boolean FALSE
Cluster_database_instances integer 1
Cluster_interconnects string

SQL> @/home/oracle/cr_ctr. SQL
Control file created.

Alarm log:
Alter. log:
Mon Mar 23 16:41:00 2015
Create controlfile reuse database "PROD" NORESETLOGS NOARCHIVELOG
# MAXLOGFILES 192
MAXLOGMEMBERS 3
MAXDATAFILES 1024
MAXINSTANCES 32
# MAXLOGHISTORY 292
LOGFILE
GROUP 1'/u01/app/oracle/oradata/prod/log11.log' SIZE 50 M,
GROUP 2'/u01/app/oracle/oradata/prod/log12.log 'SIZE 50 M,
GROUP 3 '/u01/app/oracle/oradata/prod/log21.log' SIZE 50 M,
GROUP 4'/u01/app/oracle/oradata/prod/log22.log 'SIZE 50 M
-- STANDBY LOGFILE
DATAFILE
'/U01/app/oracle/oradata/prod/system01.dbf ',
'/U01/app/oracle/oradata/prod/undotbs01.dbf ',
'/U01/app/oracle/oradata/prod/sysaux01.dbf ',
'/U01/app/oracle/oradata/prod/users01.dbf ',
'/U01/app/oracle/oradata/prod/example01.dbf ',
'/U01/app/oracle/oradata/prod/undotbs02.dbf'
Character set ZHS16GBK
Mon Mar 23 16:41:00 2015
WARNING: Default Temporary Tablespace not specified in create database command
Default Temporary Tablespace will be necessary for a locally managed database in future release
WARNING: You are creating/reusing datafile/u01/app/oracle/oradata/prod/control01.ctl.
WARNING: Oracle recommends creating new datafiles on devices with zero offset. the command "/usr/sbin/mklv-y LVname-t o-w n-s n-r n VGname NumPPs" can be used. please contact Oracle customer support for more details.
WARNING: You are creating/reusing datafile/u01/app/oracle/oradata/prod/control01.ctl.
WARNING: Oracle recommends creating new datafiles on devices with zero offset. the command "/usr/sbin/mklv-y LVname-t o-w n-s n-r n VGname NumPPs" can be used. please contact Oracle customer support for more details.
WARNING: You are creating/reusing datafile/u01/app/oracle/oradata/prod/control02.ctl.
WARNING: Oracle recommends creating new datafiles on devices with zero offset. the command "/usr/sbin/mklv-y LVname-t o-w n-s n-r n VGname NumPPs" can be used. please contact Oracle customer support for more details.
WARNING: You are creating/reusing datafile/u01/app/oracle/oradata/prod/control02.ctl.
WARNING: Oracle recommends creating new datafiles on devices with zero offset. the command "/usr/sbin/mklv-y LVname-t o-w n-s n-r n VGname NumPPs" can be used. please contact Oracle customer support for more details.
Setting recovery target incarnation to 1
Mon Mar 23 16:41:05 2015
Successful mount of redo thread 1, with mount id 286981148
Mon Mar 23 16:41:05 2015
Completed: create controlfile reuse database "PROD" NORESETLOGS NOARCHIVELOG
# MAXLOGFILES 192
MAXLOGMEMBERS 3
MAXDATAFILES 1024
MAXINSTANCES 32
# MAXLOGHISTORY 292
LOGFILE
GROUP 1'/u01/app/oracle/oradata/prod/log11.log' SIZE 50 M,
GROUP 2'/u01/app/oracle/oradata/prod/log12.log 'SIZE 50 M,
GROUP 3 '/u01/app/oracle/oradata/prod/log21.log' SIZE 50 M,
GROUP 4'/u01/app/oracle/oradata/prod/log22.log 'SIZE 50 M
-- STANDBY LOGFILE
DATAFILE
'/U01/app/oracle/oradata/prod/system01.dbf ',
'/U01/app/oracle/oradata/prod/undotbs01.dbf ',
'/U01/app/oracle/oradata/prod/sysaux01.dbf ',
'/U01/app/oracle/oradata/prod/users01.dbf ',
'/U01/app/oracle/oradata/prod/example01.dbf ',
'/U01/app/oracle/oradata/prod/undotbs02.dbf'
Character set ZHS16GBK

4. Rebuild successful, start to open
SQL> select status from v $ instance;
STATUS
------------
MOUNTED

SQL> alter database open;
Database altered.

Add a temporary tablespace data file:
SQL> select name from v $ tempfile;
No rows selected

SQL> select tablespace_name from dba_tablespaces;
TABLESPACE_NAME
------------------------------
SYSTEM
UNDOTBS1
SYSAUX
TEMP
USERS
UNDOTBS2
EXAMPLE
7 rows selected.

SQL> alter tablespace temp add
2 tempfile '/u01/app/oracle/oradata/prod/temp01.dbf' size 100 m reuse;
Tablespace altered.
SQL> select name from v $ tempfile;
NAME
--------------------------------------------------------------------------------
/U01/app/oracle/oradata/prod/temp01.dbf

5. Modify the cluster_database parameter to start all instances.
SQL> alter system set cluster_database = true scope = spfile;
System altered.

Start all instances. If all instances are started successfully, controlfile is rebuilt successfully.