ASM 安装

1.确定kernel版本

[root@D620 ASMLIB]#  uname -a
Linux D620.localhost.com 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:54 EDT 2009 i686 i686 i386 GNU/Linux
[root@D620 ASMLIB]#

2.下载安装相应版本的ASMLIB和Linux RPM,注意顺序和依赖关系

 rpm -Uvh oracleasm-support-2.1.4-1.el5.i386.rpm
 rpm -Uvh oracleasm-2.6.18-164.el5-2.0.5-1.el5.i686.rpm
 rpm -Uvh oracleasmlib-2.0.4-1.el5.i386.rpm
 rpm -Uvh  kernel-xen-2.6.18-164.el5.i686.rpm
 rpm -Uvh  oracleasm-2.6.18-164.el5xen-2.0.5-1.el5.i686.rpm
 rpm -Uvh  kernel-PAE-2.6.18-164.el5.i686.rpm
 rpm -Uvh  oracleasm-2.6.18-164.el5PAE-2.0.5-1.el5.i686.rpm
 rpm -Uvh kernel-debug-2.6.18-164.el5.i686.rpm
 rpm -Uvh  oracleasm-2.6.18-164.el5debug-2.0.5-1.el5.i686.rpm
 rpm -Uvh  oracleasm-2.6.18-164.el5-debuginfo-2.0.5-1.el5.i686.rpm

3.配置ASM，扫描磁盘
[root@D620 ~]# ls -l /etc/init.d/oracleasm
-rwxr-xr-x 1 root root 7124 Jan 11 08:23 /etc/init.d/oracleasm
[root@D620 ~]# id oracle
uid=500(oracle) gid=500(oinstall) groups=500(oinstall),501(dba)
[root@D620 ~]# /etc/init.d/oracleasm configure
Configuring the Oracle ASM library driver.

This will configure the on-boot properties of the Oracle ASM library
driver.  The following questions will determine whether the driver is
loaded on boot and what permissions it will have.  The current values
will be shown in brackets ('[]').  Hitting <ENTER> without typing an
answer will keep that current value.  Ctrl-C will abort.

Default user to own the driver interface []: oracle
Default group to own the driver interface []: dba
Start Oracle ASM library driver on boot (y/n) [n]: y
Scan for Oracle ASM disks on boot (y/n) [y]: y
Writing Oracle ASM library driver configuration: done
Initializing the Oracle ASMLib driver: [  OK  ]
Scanning the system for Oracle ASMLib disks: [  OK  ]
[root@D620 ~]# /etc/init.d/oracleasm scandisks
Scanning the system for Oracle ASMLib disks: [  OK  ]
[root@D620 ~]# /etc/init.d/oracleasm listdisks

没有空闲的raw设备了。
[root@D620 ~]# fdisk -l

Disk /dev/sda: 60.0 GB, 60011642880 bytes
255 heads, 63 sectors/track, 7296 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1         522     4192933+   b  W95 FAT32
/dev/sda2   *         523        6773    50211157+  83  Linux
/dev/sda3            6774        7295     4192965   82  Linux swap / Solaris
[root@D620 ~]#

4.创建ASM instance

首先执行localconfig.

[root@D620 ~]# cd /u01/app/oracle/product/10.2.0/db_1/bin
[root@D620 bin]# ls -l localconfig
-rwxr-xr-x 1 oracle oinstall 21995 Aug 17  2010 localconfig
[root@D620 bin]# ./localconfig add
/etc/oracle does not exist. Creating it now.
Successfully accumulated necessary OCR keys.
Creating OCR keys for user 'root', privgrp 'root'..
Operation successful.
Configuration for local CSS has been initialized

Adding to inittab
Startup will be queued to init within 90 seconds.
Checking the status of new Oracle init process...
Expecting the CRS daemons to be up within 600 seconds.
CSS is active on these nodes.
        d620
CSS is active on all nodes.
Oracle CSS service is installed and running under init(1M)
[root@D620 bin]#

手工编辑一个pfile文件：

vi /tmp/init+ASM.ora

只写一句： INSTANCE_TYPE=ASM

创建instance

export ORACLE_SID=+ASM

sqlplus / as sysdba

SQL> CREATE SPFILE FROM PFILE='/tmp/init+ASM.ora';
File created.
SQL> startup nomount
ASM instance started

Total System Global Area   79691776 bytes
Fixed Size                  1217812 bytes
Variable Size              53308140 bytes
ASM Cache                  25165824 bytes
SQL>
如果用startup mount ,会提示：

SQL> startup
ASM instance started

Total System Global Area   79691776 bytes
Fixed Size                  1217812 bytes
Variable Size              53308140 bytes
ASM Cache                  25165824 bytes
ORA-15110: no diskgroups mounted
SQL>

接下来可以创建diskgroup了。

例如：

 ALTER DISKGROUP ALL MOUNT ;
 CREATE DISKGROUP FLASH External REDUNDANCY  DISK '/dev/raw/raw1' SIZE 2870M ; 
 CREATE DISKGROUP data External REDUNDANCY  DISK '/dev/raw/raw2' SIZE 2870M ,
'/dev/raw/raw3' SIZE 2870M   ;

 

参考资料：

http://www.oracle-base.com/articles/10g/AutomaticStorageManagement10g.php