Oracle11gR2 RAC环境归档模式的配置

在10gR2中和11g,不再需要将cluster_database设置为false,将非归档的RAC数据库改成归档的RAC数据库,方法与单实例设置归档模式是一样的了。今天就演示一个归档到ASM磁盘组的例子。

第一步：查看ASM磁盘组

[root@rac1 ~]# su - grid
rac1-> sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Sat Aug 2 11:02:59 2014

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Real Application Clusters and Automatic Storage Management options

SQL> select name from v$asm_diskgroup;

NAME
--------------------------------------------------------------------------------
DATA
PROD

SQL> alter diskgroup data add directory '+DATA/ARC1';

Diskgroup altered.

SQL>

可以看到我们这边的环境有2个ASM磁盘组

第二步：创建归档目录在ASM磁盘组

因为磁盘组是共享的，所以在任意一节点创建就可以了。

[root@rac1 ~]# su - grid
rac1-> sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Sat Aug 2 11:02:59 2014

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Real Application Clusters and Automatic Storage Management options

SQL> select name from v$asm_diskgroup;

NAME
--------------------------------------------------------------------------------
DATA
PROD

SQL> alter diskgroup data add directory '+DATA/ARC1';

Diskgroup altered.

SQL>
SQL> alter diskgroup data add directory '+DATA/ARC2';

Diskgroup altered.

SQL>

第三步：设置归档目录

在节点一设置完以后，关闭数据库

SQL> SELECT INSTANCE_NAME FROM V$INSTANCE;

INSTANCE_NAME
------------------------------------------------
PROD1

SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_1='LOCATION=+DATA/ARC1' SCOPE=SPFILE SID='PROD1';

System altered.

SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_1='LOCATION=+DATA/ARC2' SCOPE=SPFILE SID='PROD2';

System altered.

SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL>

节点二也关闭数据库

SQL> SELECT INSTANCE_NAME FROM V$INSTANCE;

INSTANCE_NAME
------------------------------------------------
PROD2

SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL>

第四步：设置归档模式

第一个节点设置归档模式

rac1-> sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Sat Aug 2 11:12:19 2014

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> STARTUP MOUNT
ORACLE instance started.

Total System Global Area 1653518336 bytes
Fixed Size                  2253784 bytes
Variable Size            1073744936 bytes
Database Buffers          570425344 bytes
Redo Buffers                7094272 bytes
Database mounted.
SQL> ALTER DATABASE ARCHIVELOG;

Database altered.

SQL> archive log list
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            +DATA/arc1
Oldest online log sequence     4
Next log sequence to archive   5
Current log sequence           5
SQL>
SQL>
SQL> alter database open;

Database altered.

SQL>

第二个节点开启，注意第二个节点可以直接打开，不用再设置归档模式

rac2-> sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Sat Aug 2 11:13:26 2014

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> STARTUP MOUNT
ORACLE instance started.

Total System Global Area 1653518336 bytes
Fixed Size                  2253784 bytes
Variable Size            1073744936 bytes
Database Buffers          570425344 bytes
Redo Buffers                7094272 bytes
Database mounted.
SQL> ALTER DATABASE ARCHIVELOG;

Database altered.

SQL> archive log list
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            +DATA/arc2
Oldest online log sequence     1
Next log sequence to archive   2
Current log sequence           2
SQL>
SQL> alter database open;

Database altered.

SQL>

第五步：2节点切换日志，查看归档文件是否生成

SQL> alter system switch logfile;

2个节点都要运行，产生各自节点的归档文件

[root@rac1 ~]# su - grid
rac1-> asmcmd
ASMCMD> ls
DATA/
PROD/
ASMCMD> cd DATA
ASMCMD> ls
ARC1/
ARC2/
PROD/
scan-cluster/
ASMCMD> cd ARC1/
ASMCMD> ls
1_5_851804842.dbf
ASMCMD>
ASMCMD> cd ..
ASMCMD> pwd
+DATA
ASMCMD> cd ARC2
ASMCMD> ls
2_2_851804842.dbf
ASMCMD>

好了检查完毕。成功！