LINUX 11G RAC ASM磁盘组在线增加磁盘扩容

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