oracleasm方式建立ASM

一、準備oracleasm包

[root@localhost oracle]# uname -r
2.6.18-164.el5

[oracle@localhost ~]$ ls -l
total 264
-rw-r--r-- 1 oracle oinstall 136910 Jun 23 00:16 oracleasm-2.6.18-164.el5-2.0.5-1.el5.x86_64.rpm
-rw-r--r-- 1 oracle oinstall  14176 Jun 23 00:16 oracleasmlib-2.0.4-1.el5.x86_64.rpm
-rw-r--r-- 1 oracle oinstall  90225 Jun 23 00:16 oracleasm-support-2.1.8-1.el5.x86_64.rpm

二、用root用戶安裝oracleasm包

在下載的時候，須要注意與linux操做系統的內核版本一致，不然可能會出現錯誤

[root@localhost oracle]# rpm -ivh oracleasm*
warning: oracleasm-2.6.18-164.el5-2.0.5-1.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 1e5e0159
Preparing...                ########################################### [100%]
   1:oracleasm-support      ########################################### [ 33%]
   2:oracleasm-2.6.18-164.el########################################### [ 67%]
   3:oracleasmlib           ########################################### [100%]

三、配置驅動

[root@localhost oracle]# /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  --輸入所屬用戶
Default group to own the driver interface []: oinstall  --輸入所屬組

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  ]

四、 檢查配置是否成功

確認ASMlib驅動被加載

[root@localhost oracle]# lsmod |grep asm
oracleasm              84136  1 

確認系統內存在oracleasm文件系統

[root@localhost oracle]# cat /proc/filesystems |grep oracleasm
nodev	oracleasmfs

確認oracleasm文件系統被掛載

[root@localhost oracle]# df -ha |grep oracleasm
oracleasmfs              0     0     0   -  /dev/oracleasm

五、fdisk建立磁盤

[root@localhost ~]# fdisk -l

Disk /dev/sda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1           6       48163+  83  Linux
/dev/sda2               7         515     4088542+  83  Linux
/dev/sda3             516         772     2064352+  82  Linux swap / Solaris
/dev/sda4             773        1044     2184840    5  Extended
/dev/sda5             773        1044     2184808+  83  Linux

Disk /dev/sdb: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdb doesn't contain a valid partition table

Disk /dev/sdc: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdc doesn't contain a valid partition table

發現存在幾個未使用的，/dev/sdb，/dev/sdc

[root@localhost ~]# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that, of course, the previous
content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

Command (m for help): n --添加一塊磁盤
Command action
   e   extended
   p   primary partition (1-4)
p   --主磁盤
Partition number (1-4): 1  --第一分區
First cylinder (1-261, default 1): 
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-261, default 261): 
Using default value 261

Command (m for help): w   --寫入
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

查看建立好的磁盤：

[root@localhost ~]# fdisk -l

Disk /dev/sda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1           6       48163+  83  Linux
/dev/sda2               7         515     4088542+  83  Linux
/dev/sda3             516         772     2064352+  82  Linux swap / Solaris
/dev/sda4             773        1044     2184840    5  Extended
/dev/sda5             773        1044     2184808+  83  Linux

Disk /dev/sdb: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1         261     2096451   83  Linux

Disk /dev/sdc: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1         261     2096451   83  Linux

六、建立ASM磁盤

[root@localhost ~]# /etc/init.d/oracleasm createdisk KEL1 /dev/sdb1
Marking disk "KEL1" as an ASM disk:                        [  OK  ]
[root@localhost ~]# /etc/init.d/oracleasm createdisk KEL2 /dev/sdc1
Marking disk "KEL2" as an ASM disk:                        [  OK  ]

查看建立好的磁盤：

[root@localhost disks]# pwd
/dev/oracleasm/disks   --建立好的磁盤在此目錄中
[root@localhost disks]# ls -l
total 0
brw-rw---- 1 oracle oinstall 8, 17 Jun 23 00:32 KEL1
brw-rw---- 1 oracle oinstall 8, 33 Jun 23 00:32 KEL2

檢查建立成功：

[root@localhost ~]# /etc/init.d/oracleasm listdisks
KEL1
KEL2

在RAC環境中須要在另一節點執行：

[root@localhost ~]# /etc/init.d/oracleasm scandisks
Scanning the system for Oracle ASMLib disks:               [  OK  ]

[root@localhost ~]# /etc/init.d/oracleasm listdisks
KEL1
KEL2

從而在全部的節點均可以看見建立的ASM磁盤。

七、 啓動CSS進程

在啓動的時候，務必已經安裝了oracle數據庫，不然的話是不存在localconfig這個命令的

[root@kel ~]# /home/oracle/product/10.2.0/db_1/bin/localconfig add
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.
	kel
CSS is active on all nodes.
Oracle CSS service is installed and running under init(1M)

八、配置ASM實例

[oracle@kel asm]$ vi initasm.ora 

INSTANCE_TYPE = ASM
ASM_POWER_LIMIT = 3
ASM_DISKSTRING = 'ORCL:KEL1','ORCL,KEL2'
DB_UNIQUE_NAME = '+ASM'

九、啓動ASM

[oracle@kel asm]$ export ORACLE_SID=+ASM --默認的ASM實例名稱
[oracle@kel asm]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Mon Jun 23 01:38:46 2014

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup pfile='/home/oracle/asm/initasm.ora';
ASM instance started

Total System Global Area  125829120 bytes
Fixed Size		    2019000 bytes
Variable Size		   98644296 bytes
ASM Cache		   25165824 bytes
ORA-15110: no diskgroups mounted

錯誤表示，暫時沒有磁盤組建立，從而也不會自動的掛在磁盤

十、建立spfile

SQL> create spfile from pfile;

File created.

使用spfile的好處是，之後建立了磁盤組以後，會自動的修改參數asm_diskgroups，從而在每次啓動的時候能夠自動的掛載磁盤組。

十一、建立磁盤組

SQL> create diskgroup KEL external redundancy  disk 'ORCL:KEL1','ORCL:KEL2';

十二、手工註冊ASM

SQL> alter system register;

System altered.

1三、建立表空間

在建立表空間的時候，數據庫必須打開，而後在數據庫的sqlplus中建立表空間便可

SQL> create tablespace kel datafile '+ASM/kel.dbf' size 50M;

Tablespace created.

附加：

刪除CSS配置：

[root@kel ~]# /home/oracle/product/10.2.0/db_1/bin/localconfig delete
Stopping CSSD.
Shutting down CSS daemon.
Shutdown request successfully issued.
Shutdown has begun. The daemons should exit soon.