LINUX 11G RAC ASM磁盘组在线增加磁盘扩容
1.操作系统版本 OEL 6.1
[root@cqltjcpt1 ~]# more /etc/redhat-release
Red Hat Enterprise Linux Server release 6.1 (Santiago)
2.数据库版本 oracle 11g rac
SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE 11.2.0.3.0 Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production
3.存储环境VMWARE exsi5.0虚拟EMC存储
4.在节点1，2上查看所有系统磁盘
[root@cqltjcpt1 ~]# fdisk -l | grep sd*
Disk /dev/sda: 128.8 GB, 128849018880 bytes
/dev/sda1 * 1 14 103424 83 Linux
/dev/sda2 14 4191 33554432 82 Linux swap / Solaris
/dev/sda3 4191 15666 92170240 8e Linux LVM
Disk /dev/sdb: 2147 MB, 2147483648 bytes
/dev/sdb1 1 261 2096451 83 Linux
Disk /dev/sdc: 2147 MB, 2147483648 bytes
/dev/sdc1 1 261 2096451 83 Linux
Disk /dev/sdd: 2147 MB, 2147483648 bytes
/dev/sdd1 1 261 2096451 83 Linux
Disk /dev/sde: 536.9 GB, 536870912000 bytes
/dev/sde1 1 65270 524281243+ 83 Linux
Disk /dev/sdf: 536.9 GB, 536870912000 bytes
/dev/sdf1 1 65270 524281243+ 83 Linux
Disk /dev/sdg: 536.9 GB, 536870912000 bytes
/dev/sdg1 1 65270 524281243+ 83 Linux
Disk /dev/sdh: 214.7 GB, 214748364800 bytes
Disk /dev/sdi: 107.4 GB, 107374182400 bytes
5.当前系统硬盘为sda到sdi,现在需要增加一块500G的共享硬盘，来扩容ASM磁盘组,增加新硬盘后系统识别应为sdj
查看伪文件系统下的/proc/scsi/scsi文件有scsi1,scsi2，scsi3 三个通道
[root@cqltjcpt1 ~]# more /proc/scsi/scsi
Attached devices:
Host: scsi1 Channel: 00 Id: 00 Lun: 00
Vendor: NECVMWar Model: VMware IDE CDR10 Rev: 1.00
Type: CD-ROM ANSI SCSI revision: 05
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 00 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 01 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 02 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 03 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 04 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 05 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 06 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 08 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
6.在节点1,2执行echo 命令，
[root@cqltjcpt1 ~]# echo "- - -" > /sys/class/scsi_host/host3/scan
当前的最大ID号为08，执行完echo命令后，系统的/proc/scsi/scsi文件下会出现ID为09的标识号
如下：
Host: scsi3 Channel: 00 Id: 09 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
7.分别在节点1,2查看/proc/scsi/scsi文件，此时节点1,2已识别到 Host: scsi3 Channel: 00 Id: 09 Lun: 00
[root@cqltjcpt1 ~]# more /proc/scsi/scsi | grep 09
Host: scsi3 Channel: 00 Id: 09 Lun: 00
[root@cqltjcpt2 ~]# more /proc/scsi/scsi | grep 09
Host: scsi3 Channel: 00 Id: 09 Lun: 00
8.在节点1上对sdj分区
[root@cqltjcpt1 ~]#fdisk /dev/sdj
[root@cqltjcpt1 ~]#partprobe
9.节点1,2查看sdj1分区，以后成功识别
[root@cqltjcpt1 ~]# fdisk -l | grep sdj
Disk /dev/sdj: 536.9 GB, 536870912000 bytes
/dev/sdj1 1 65270 524281243+ 83 Linux
[root@cqltjcpt2 ~]# fdisk -l | grep sdj
Disk /dev/sdj: 536.9 GB, 536870912000 bytes
/dev/sdj1
10.节点1上用grid用户登录，查看当前ASM磁盘组
[root@cqltjcpt1 ~]#su - grid
查看asm磁盘组
[grid@cqltjcpt1 ~]$sqlplus / as sysasm
SQL> select group_number,name,TOTAL_MB, FREE_MB from v$asm_diskgroup
GROUP_NUMBER NAME TOTAL_MB FREE_MB
------------ ----------------- ---------- ----------
1 CQDATA 1547972 525323
2 FRA 511993 477058
3 OCR 6141 5741
11.查看asm磁盘
[root@cqltjcpt1 ~]# oracleasm listdisks
DATA1
DATA2
FRA
OCR_VOT1
OCR_VOT2
OCR_VOT3
12.现在是要将500G的磁盘扩容到CQDATA的ASM的磁盘组中去
首先需要创建新的ASM磁盘
节点1上执行
[root@cqltjcpt1 ~]#oracleasm createdisk DATA3 /dev/sdj1
[root@cqltjcpt1 ~]#oracleasm scandisks
[root@cqltjcpt1 ~]#oracleasm listdisks
DATA1
DATA2
DATA3
FRA
OCR_VOT1
OCR_VOT2
OCR_VOT3
节点2上执行
[root@cqltjcpt2 ~]# oracleasm scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...
[root@cqltjcpt2 ~]#oracleasm listdisks
DATA1
DATA2
DATA3
FRA
OCR_VOT1
OCR_VOT2
OCR_VOT3
此时，节点1,2都已经识别到新的ASM磁盘DATA3
13.节点1执行，查看ASM磁盘，确定PATH
[root@cqltjcpt1 ~]# su - grid
[grid@cqltjcpt1 ~]$ sqlplus / as sysasm
SQL> select name, path, mode_status, state, disk_number,failgroup from v$asm_disk;
NAME PATH MODE_STATUS STATE DISK_NUMBER FAILGROUP
-------- ------------------ -------------- ----------- ----------- ----------
DATA1 ORCL:DATA1 ONLINE NORMAL 0 DATA1
DATA2 ORCL:DATA2 ONLINE NORMAL 1 DATA2
DATA3 ORCL:DATA3 ONLINE NORMAL 2 DATA3
FRA ORCL:FRA ONLINE NORMAL 0 FRA
OCR_VOT1 ORCL:OCR_VOT1 ONLINE NORMAL 0 OCR_VOT1
OCR_VOT2 ORCL:OCR_VOT2 ONLINE NORMAL 1 OCR_VOT2
14.在节点1上，grid用户已sysasm登录ASM实例，给CQDATA磁盘组增加新的ASM磁盘DATA3
SQL> alter diskgroup CQDATA add disk 'ORCL:DATA3' rebalance power 10;
GROUP_NUMBER OPERATION STATE POWER ACTUAL SOFAR EST_WORK EST_RATE EST_MINUTES ERROR_CODE
------------ ---------- -------- ---------- ---------- ---------- ---------- ---------- ----------- ----------
1 REBAL RUN 1 1 130396 340324 1224 171
查看当前reblance 时间，500G 需要1小时左右
SQL>select * from v$asm_opration；
GROUP_NUMBER OPERATION STATE POWER ACTUAL SOFAR EST_WORK EST_RATE EST_MINUTES ERROR_CODE
------------ ---------- -------- ---------- ---------- ---------- ---------- ---------- ----------- ------------------------------
1 REBAL RUN 1 1 13327 332978 1242 57
15.当查询v$asm_operation时无数据输出时，意味着ASM的reblance动作结束
SQL> select * from v$asm_operation;
no rows selected
修改reblance 参数为默认
SQL> ALTER DISKGROUP DATA1 REBALANCE POWER 1;
16.在节点1,2上分别查询，以下结果
SQL> SELECT,NAME,FREE_MB,TOTAL_MB FROM V$ASM_DISKGROUP
NAME FREE_MB TOTAL_MB
-------------------- ---------- ----------
CQDATA 1025323 2047972
FRA 477058 511993
OCR 5741 6141
CQDATA磁盘组已经成功完成扩容 本文基于VMware下测试，存储多路径问题在本实验已被vmware忽略，若有遗漏或不明处欢迎拍砖