首先创建磁盘（如果是虚拟机，通过添加hard disk 文件加磁盘）
[需要停虚拟机，将盘添加到第二个节点]
[root@node1 ~]#fdisk /dev/sdf
输入以下：n/p/1/enter/enter
node1上初始化ASM盘
[root@node1 ~]#/etc/init.d/oracleasm createdisk NOVA3 /dev/sdf1
node2 上扫描并列盘
[root@node2 ~]#/etc/init.d/oracleasm scandisks
[root@node2 ~]# /etc/init.d/oracleasm listdisks
NOVA1
NOVA2
NOVA3
登录node1添加磁盘
[root@node1 ~]#su – oracle
[root@node1 ~]#ORACLE_SID=+ASM1
[root@node1 ~]#sqlplus / as sysdba
SQL>alter diskgroup RAC_DISK add disk ‘ORCL:NOVA3′ name test_asmdisk;
登录node2测试
SQL> select path from v$asm_disk;
PATH
——————————————————————————–
ORCL:NOVA3
/dev/raw/raw2
/dev/raw/raw1
ORCL:NOVA1
ORCL:NOVA2
/dev/raw/raw3
/dev/raw/raw4
SQL> select NAME,ALLOCATION_UNIT_SIZE,TOTAL_MB from v$asm_diskgroup;
NAME ALLOCATION_UNIT_SIZE TOTAL_MB
—————————— ——————– ———-
RAC_DISK 1048576 8180
在node1上执行，ASM上创建一个表空间
[oracle@node1 ~]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.1.0 – Production on Fri May 8 17:19:58 2009
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 – Production
With the Partitioning, Real Application Clusters, OLAP and Data Mining options
SQL> create tablespace nova_test datafile ‘+RAC_DISK’ size 200M;
Tablespace created.
SQL> create user nova identified by nova default tablespace nova_test;
User created.
SQL> grant dba to nova;
Grant succeeded.
SQL> conn nova/nova;
Connected.
SQL> create table t_test as select * from dba_objects;
Table created.
SQL> select count(*) from t_test;
COUNT(*)
———-
50029
SQL>
登录node2上执行，做一下测试。
[oracle@node2 ~]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.1.0 – Production on Fri May 8 17:24:00 2009
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 – Production
With the Partitioning, Real Application Clusters, OLAP and Data Mining options
SQL> conn nova/nova
Connected.
SQL> select count(*)from t_test;
COUNT(*)
———-
50029
SQL>
其他命令操作
alter diskgroup dgroup1 add failgroup fgroup1 disk ‘ORCL:NOVA3′ failgroup fgroup2 disk ‘ORCL:VOL6′;
自动平衡的工作进度
desc v$asm_operation
select * from v$asm_operation;
查询ASM磁盘组对应关系
select label,failgroup from v$asm_disk;
查看磁盘组的名称和状态
SQL> select state,header_status,substr(name,1,12) Name,free_mb,substr(path,1,16) PATH from v$asm_disk;STATE HEADER_STATU NAME FREE_MB PATH
——– ———— ———— ———- —————-
NORMAL FOREIGN 0 /dev/raw/raw2
NORMAL FOREIGN 0 /dev/raw/raw1
NORMAL UNKNOWN 0 ORCL:NOVA1
NORMAL UNKNOWN 0 ORCL:NOVA2
NORMAL MEMBER RAC_DISK_000 2496 /dev/raw/raw3
NORMAL MEMBER RAC_DISK_000 3334 /dev/raw/raw4
NORMAL MEMBER TEST_ASMDISK 826 ORCL:NOVA3
查看ASM磁盘管理均衡情况
SQL>select operation,state,power,actual,sofar,est_work,est_minutes from v$asm_operation;
登入到ASM的实例，删除磁盘组中VOL4磁盘
alter diskgroup RAC_DISK drop disk NOVA3;
强制让ASM自动平衡
alter diskgroup RAC_DISK rebalance;
加入故障盘到磁盘组
alter diskgroup dgroup1 add failgroup fgroup1 disk ‘ORCL:NOVA3′ failgroup fgroup2 disk ‘ORCL:NOVA4′;