oracleRAC更换存储迁移数据

oracle RAC 更换存储迁移数据
我们利用ASM rebalance特性实现更换存储迁移数据的需求
基本 零宕机时间（操作步骤总结）
1）保证新存储和RAC当前节点间的可用性；
2）新存储划分LUN，可以重新规划存储方案；
3）迁移OCR和表决盘
4）给现有ASM磁盘组添加ASM磁盘(新存储分配的)，充分利用ASM REBALANCE技术
5）删除原存储的ASM磁盘
6）观察期


 1 当前存储信息
以下ASM磁盘组、OCR、VOTE信息：
ASM磁盘组：
ASMCMD> lsdg
State    Type    Rebal  Sector  Block       AU  Total_MB  Free_MB  Req_mir_free_MB  Usable_file_MB  Offline_disks  Voting_files  Name
MOUNTED  NORMAL  N         512   4096  1048576   3071982  3071091              298         1535396              0             N  BACK/
MOUNTED  NORMAL  N         512   4096  1048576   4095976  1561759           633568          464095              0             N  DATA/
MOUNTED  NORMAL  N         512   4096  1048576    102396   101470              326           50572              0             N  OCR/


当前ASM有BACK，DATA，OCR三个磁盘组，总大小7TB，磁盘组主要存放数据文件和归档日志文件，COR文件，以下是各磁盘组磁盘信息：
SQL> select NAME,PATH,total_mb,free_mb from v$asm_disk;
NAME                           PATH                             TOTAL_MB    FREE_MB
------------------------------ ------------------------------ ---------- ----------
BACK_VOL1                      ORCL:BACK_VOL1                    1023994     390436
DATA_VOL1                      ORCL:DATA_VOL1                    1023994     390450
DATA_VOL2                      ORCL:DATA_VOL2                    1023994     390447
DATA_VOL3                      ORCL:DATA_VOL3                    1023994     390426
DATA_VOL4                      ORCL:DATA_VOL4                    1023994    1023697
DATA_VOL5                      ORCL:DATA_VOL5                    1023994    1023698
DATA_VOL6                      ORCL:DATA_VOL6                    1023994    1023696
OCR_VOL1                       ORCL:OCR_VOL1                       31376      31075
OCR_VOL2                       ORCL:OCR_VOL2                       31376      31077
OCR_VOL3                       ORCL:OCR_VOL3                       39644      39318
10 rows selected.


OCR&VOTE信息：
[grid@oracle1 bin]$ ./ocrcheck
Status of Oracle Cluster Registry is as follows :
         Version                  :          3
         Total space (kbytes)     :     262120
         Used space (kbytes)      :       2720
         Available space (kbytes) :     259400
         ID                       : 2006438789
         Device/File Name         :       +OCR
                                    Device/File integrity check succeeded
                                    Device/File not configured
                                    Device/File not configured
                                    Device/File not configured
                                    Device/File not configured
         Cluster registry integrity check succeeded
         Logical corruption check bypassed due to non-privileged user
         由于OCR和VOTEDISK都和ASM放在同一个存储上，所以OCR和VOTEDISK也需要迁移到新的存储上。
 
 
2 新存储磁盘分区
要求：（由存储工程师操作）
2.1. 共享存储，两台服务器都可以看到新存储分配的磁盘空间。
2.2. 如之前ASM磁盘组所有存储分区大小，个数保持一致。

3 划分后磁盘分区
[root@oracle1 sbin]# fdisk -l

Disk /dev/cciss/c0d0: 1000.1 GB, 1000171331584 bytes
255 heads, 63 sectors/track, 121597 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

           Device Boot      Start         End      Blocks   Id  System
/dev/cciss/c0d0p1   *           1          13      104391   83  Linux
/dev/cciss/c0d0p2              14      121597   976623480   8e  Linux LVM

Disk /dev/sda: 1073.7 GB, 1073741824000 bytes
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1      130541  1048570551   83  Linux

Disk /dev/sdb: 1073.7 GB, 1073741824000 bytes
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1      130541  1048570551   83  Linux

Disk /dev/sdc: 1073.7 GB, 1073741824000 bytes
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1      130541  1048570551   83  Linux

Disk /dev/sdd: 1073.7 GB, 1073741824000 bytes
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1               1      130541  1048570551   83  Linux

Disk /dev/sde: 1073.7 GB, 1073741824000 bytes
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sde1               1      130541  1048570551   83  Linux

Disk /dev/sdf: 1073.7 GB, 1073741824000 bytes
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdf1               1      130541  1048570551   83  Linux

Disk /dev/sdg: 1073.7 GB, 1073741824000 bytes
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdg1               1      130541  1048570551   83  Linux

Disk /dev/sdh: 107.3 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdh2               1        4000    32129968+  83  Linux
/dev/sdh3            4001        8000    32130000   83  Linux
/dev/sdh4            8001       13054    40596255   83  Linux

WARNING: The size of this disk is2.9 TB (2919504019456 bytes).
DOS partition table format can not be used on drives for volumes
larger than 2.2 TB (2199023255040 bytes). Use parted(1) and GUID 
partition table format (GPT).

Disk /dev/sdi: 2919.5 GB, 2919504019456 bytes
255 heads, 63 sectors/track, 354942 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdi1               1      130000  1044224968+  83  Linux
/dev/sdi2          130001      267349  1103255842+  83  Linux

Disk /dev/sdj: 1073.7 GB, 1073741824000 bytes   --------------------------------新加盘
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

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

Disk /dev/sdk: 1073.7 GB, 1073741824000 bytes
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

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

Disk /dev/sdl: 1073.7 GB, 1073741824000 bytes
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

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

Disk /dev/sdm: 1073.7 GB, 1073741824000 bytes
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

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

Disk /dev/sdn: 1073.7 GB, 1073741824000 bytes
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdn doesn't contain a validpartition table

Disk /dev/sdo: 1073.7 GB, 1073741824000 bytes
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdo doesn't conain a valid partition table

Disk /dev/sdp: 1073.7 GB, 1073741824000 bytes
255 heads, 63 sectors/track, 130541 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

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

Disk /dev/sdq: 107.3 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

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

Disk /dev/sdr: 2919.5 GB, 2919504019456 bytes
255 heads, 63 sectors/track, 354942 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

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

Disk /dev/sds: 322.1 GB, 322122547200 bytes
255 heads, 63 sectors/track, 39162 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sds1               1       39162   314568733+  8e  Linux LVM

Disk /dev/sdt: 322.1 GB, 322122547200 bytes
255 heads, 63 sectors/track, 39162 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdt1               1       39162   314568733+  8e  Linux LVM


4 配置ASM新磁盘
/etc/init.d/oracleasm createdisk DATA_VOL01 /dev/sdj1
/etc/init.d/oracleasm createdisk DATA_VOL02 /dev/sdk1
/etc/init.d/oracleasm createdisk DATA_VOL03 /dev/sdl1
/etc/init.d/oracleasm createdisk DATA_VOL04 /dev/sdm1
/etc/init.d/oracleasm createdisk DATA_VOL05 /dev/sdn1
/etc/init.d/oracleasm createdisk DATA_VOL06 /dev/sdo1
/etc/init.d/oracleasm createdisk BACK_VOL01 /dev/sdp1
/etc/init.d/oracleasm createdisk OCR_VOL4 /dev/sdq1
/etc/init.d/oracleasm createdisk OCR_VOL5 /dev/sdq2
/etc/init.d/oracleasm createdisk OCR_VOL6 /dev/sdq3

5 创建新的OCRNEW磁盘组
su – grid
sqlplus / as sysasm
CREATE DISKGROUP OCRNEW NORMAL REDUNDANCY 
DISK 'ORCL:OCR_VOL4' NAME VOL4
DISK 'ORCL:OCR_VOL5' NAME VOL5
DISK 'ORCL:OCR_VOL6' NAME VOL6 ATTRIBUTE 'compatible.asm'='11.2';

6 添加OCR信息到OCRNEW 
 [root@oracle1 bin]# ./ocrconfig -add  +OCRNEW
 [root@oracle1 bin]# ./ocrcheck -config
Oracle Cluster Registry configuration is :
         Device/File Name         :       +OCR
         Device/File Name         :    +OCRNEW
[root@oracle1 bin]# more /etc/oracle/ocr.loc
#Device/file  getting replaced by device +OCRNEW 
ocrconfig_loc=+OCR
ocrmirrorconfig_loc=+OCRNEW
local_only=false
[root@oracle1 bin]#

可以看到OCRNEW 磁盘组已经成功添加到OCR磁盘信息中

迁移vote 文件
当前votedisk信息
[grid@oracle1 ~]$ crsctl query css votedisk 
##  STATE    File Universal Id                File Name Disk group
--  -----    -----------------                --------- ---------
 1. ONLINE   14f694d9d4414f9ebf85d3ce6b9aef0b (ORCL:OCR_VOL1) [OCR]
 2. ONLINE   9f9ee7281c954f8abfcc6e88c33257ac (ORCL:OCR_VOL2) [OCR]
 3. ONLINE   38114fd602194fa9bf4d05655b3d89b7 (ORCL:OCR_VOL3) [OCR]
Located 3 voting disk(s).

[grid@oracle1 ~]$ crsctl replace votedisk +OCRNEW
Successful addition of voting disk 00634ef593ee4f92bf48e8c089cb5565.
Successful addition of voting disk 232159722de04f67bf03a78b757e3bec.
Successful addition of voting disk a340d5b23aac4f6fbf9f7b1d59088fa5.
Successful deletion of voting disk 14f694d9d4414f9ebf85d3ce6b9aef0b.
Successful deletion of voting disk 9f9ee7281c954f8abfcc6e88c33257ac.
Successful deletion of voting disk 38114fd602194fa9bf4d05655b3d89b7.
Successfully replaced voting disk group with +OCRNEW.
CRS-4266: Voting file(s) successfully replaced

7 创建ASM实例spfile到OCR_NEW
创建ASM实例spfile到新创建的OCR_NEW ASM磁盘组上（在一个节点grid用户登录ASM实例执行）
SQL> create pfile='/home/grid/asmpfile.ora' from spfile;
File created.

SQL> create spfile='+OCRNEW' from pfile='/home/grid/asmpfile.ora';
File created.

8 删除ASM磁盘组OCR
[root@oracle1 bin]# ./ocrconfig -delete +OCR
查看OCR和VOTE新状态与位置 
[root@oracle1 bin]# ./ocrcheck && ./crsctl query css votedisk
Status of Oracle Cluster Registry is as follows :
         Version                  :          3
         Total space (kbytes)     :     262120
         Used space (kbytes)      :       2768
         Available space (kbytes) :     259352
         ID                       : 2006438789
         Device/File Name         :    +OCRNEW
                                    Device/File integrity check succeeded
                                    Device/File not configured
                                    Device/File not configured
                                    Device/File not configured
                                    Device/File not configured
         Cluster registry integrity check succeeded
         Logical corruption check succeeded

##  STATE    File Universal Id                File Name Disk group
--  -----    -----------------                --------- ---------
 1. ONLINE   00634ef593ee4f92bf48e8c089cb5565 (ORCL:OCR_VOL4) [OCRNEW]
 2. ONLINE   232159722de04f67bf03a78b757e3bec (ORCL:OCR_VOL5) [OCRNEW]
 3. ONLINE   a340d5b23aac4f6fbf9f7b1d59088fa5 (ORCL:OCR_VOL6) [OCRNEW]
Located 3 voting disk(s).

SYS@+ASM1> alter diskgroup OCR dismount;
 
Diskgroup altered.
SYS@+ASM2> drop diskgroup OCR including contents;
 
Diskgroup dropped.
SYS@+ASM2> SQL> select GROUP_NUMBER,NAME,STATE,type,TOTAL_MB,free_mb,VOTING_FILES,COMPATIBILITY from v$asm_diskgroup;
GROUP_NUMBER NAME                           STATE       TYPE     TOTAL_MB    FREE_MB V COMPATIBILITY
------------ ------------------------------ ----------- ------ ---------- ---------- - ------------------------------------------------------------
           1 BACK                           MOUNTED     NORMAL    3071982    3070675 N 11.2.0.0.0
           2 DATA                           MOUNTED     NORMAL    4095976    1561759 N 11.2.0.0.0
           3 OCRNEW                         MOUNTED     NORMAL     102396     101470 N 11.2.0.0.0

SYS@+ASM2> SQL> select GROUP_NUMBER,DISK_NUMBER,STATE,REDUNDANCY,TOTAL_MB,FREE_MB,name,path,failgroup from v$asm_disk order by GROUP_NUMBER;
GROUP_NUMBER DISK_NUMBER STATE    REDUNDA   TOTAL_MB    FREE_MB NAME                           PATH                           FAILGROUP
------------ ----------- -------- ------- ---------- ---------- ------------------------------ ------------------------------ ------------------------------
           0           0 NORMAL   UNKNOWN          0          0                                ORCL:OCR_VOL1
           0           1 NORMAL   UNKNOWN          0          0                                ORCL:OCR_VOL2
           0           2 NORMAL   UNKNOWN          0          0                                ORCL:OCR_VOL3
           1           1 NORMAL   UNKNOWN    1023994    1023559 DATA_VOL5                      ORCL:DATA_VOL5                 DATA_VOL5
           1           0 NORMAL   UNKNOWN    1023994    1023559 DATA_VOL4                      ORCL:DATA_VOL4                 DATA_VOL4
           1           2 NORMAL   UNKNOWN    1023994    1023557 DATA_VOL6                      ORCL:DATA_VOL6                 DATA_VOL6
           2           2 NORMAL   UNKNOWN    1023994     390447 DATA_VOL2                      ORCL:DATA_VOL2                 DATA_VOL2
           2           1 NORMAL   UNKNOWN    1023994     390450 DATA_VOL1                      ORCL:DATA_VOL1                 DATA_VOL1
           2           0 NORMAL   UNKNOWN    1023994     390436 BACK_VOL1                      ORCL:BACK_VOL1                 BACK_VOL1
           2           3 NORMAL   UNKNOWN    1023994     390426 DATA_VOL3                      ORCL:DATA_VOL3                 DATA_VOL3
           3           0 NORMAL   UNKNOWN      31376      31075 VOL4                           ORCL:OCR_VOL4                  VOL4

GROUP_NUMBER DISK_NUMBER STATE    REDUNDA   TOTAL_MB    FREE_MB NAME                           PATH                           FAILGROUP
------------ ----------- -------- ------- ---------- ---------- ------------------------------ ------------------------------ ------------------------------
           3           1 NORMAL   UNKNOWN      31376      31077 VOL5                           ORCL:OCR_VOL5                  VOL5
           3           2 NORMAL   UNKNOWN      39644      39318 VOL6                           ORCL:OCR_VOL6                  VOL6
13 rows selected.
至此整个OCR&VOTING迁移过程结束

 9.这里可以重启下集群crs测试OCR&VOTE是否迁移成功，当然你也可以选择不重启，个人建议重启测试下。
 
查看OCR&VOTE位置及ASM实例spfile位置
[root@oracle1 bin]# ./ocrcheck && ./crsctl query css votedisk
Status of Oracle Cluster Registry is as follows :
         Version                  :          3
         Total space (kbytes)     :     262120
         Used space (kbytes)      :       2768
         Available space (kbytes) :     259352
         ID                       : 2006438789
         Device/File Name         :    +OCRNEW
                                    Device/File integrity check succeeded
                                    Device/File not configured
                                    Device/File not configured
                                    Device/File not configured
                                    Device/File not configured
         Cluster registry integrity check succeeded
         Logical corruption check succeeded

##  STATE    File Universal Id                File Name Disk group
--  -----    -----------------                --------- ---------
 1. ONLINE   00634ef593ee4f92bf48e8c089cb5565 (ORCL:OCR_VOL4) [OCRNEW]
 2. ONLINE   232159722de04f67bf03a78b757e3bec (ORCL:OCR_VOL5) [OCRNEW]
 3. ONLINE   a340d5b23aac4f6fbf9f7b1d59088fa5 (ORCL:OCR_VOL6) [OCRNEW]
Located 3 voting disk(s).

SQL> show parameter spfile;
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
spfile                               string      +OCRNEW/oracle-cluster/asmpara
                                                 meterfile/registry.253.8456918
                                                 87
SQL>
 
10 迁移数据磁盘组数据
SQL> alter diskgroup DATA add disk 'ORCL:DATA_VOL01' rebalance power 11;
Diskgroup altered.
SQL> alter diskgroup DATA add disk 'ORCL:DATA_VOL02' rebalance power 11;
Diskgroup altered.
SQL> alter diskgroup DATA add disk 'ORCL:DATA_VOL03' rebalance power 11;
Diskgroup altered.
SQL> alter diskgroup DATA add disk 'ORCL:DATA_VOL04' rebalance power 11;
Diskgroup altered.
SQL> alter diskgroup back add disk 'ORCL:DATA_VOL05' rebalance power 11;
Diskgroup altered.
SQL> alter diskgroup back add disk 'ORCL:DATA_VOL06' rebalance power 11;
SQL> alter diskgroup BACK add disk 'ORCL:BACK_VOL01' rebalance power 11;
Diskgroup altered.
由于指定rebalance power 11，ASM会自动均衡ASM磁盘组DATA里面存放的数据在各ASM磁盘的分布。

当rebalance结束后，查询V$ASM_OPERATION视图，将不会返回信息。
SQL> select * from V$ASM_OPERATION;
no rows selected

11 删除数据磁盘组上的旧磁盘
alter diskgroup data drop disk 'BACK_VOL1' rebalance power 11;
alter diskgroup data drop disk 'DATA_VOL2' rebalance power 11;
alter diskgroup data drop disk 'DATA_VOL3' rebalance power 11;
alter diskgroup back drop disk 'DATA_VOL4' rebalance power 11;
alter diskgroup back drop disk 'DATA_VOL5' rebalance power 11;
alter diskgroup back drop disk 'DATA_VOL6' rebalance power 11;
ASM不但向磁盘组中加入新磁盘时会做rebalance，在删除ASM磁盘时也会rebalance，将该磁盘上的数据rebalance到其他该磁盘组的磁盘中。

按照此方法删除ASM磁盘后，ASM的所有数据都已经存放在新的存储上。
09:40:38 SQL> select a.NAME GROUP_NAME,a.TOTAL_MB,a.FREE_MB GROUP_FREE_MB,b.OS_MB,b.FREE_MB,b.name,b.path from v$asm_diskgroup a,v$asm_disk b where a.GROUP_NUMBER=b.GROUP_NUMBER;
GROUP_NAME                       TOTAL_MB GROUP_FREE_MB      OS_MB    FREE_MB NAME                           PATH
------------------------------ ---------- ------------- ---------- ---------- ------------------------------ ----------------------------------------
BACK                              3071982       3070868    1023994    1023622 DATA_VOL05                     ORCL:DATA_VOL05
BACK                              3071982       3070868    1023994    1023624 DATA_VOL06                     ORCL:DATA_VOL06
OCRNEW                             102396        101470      31376      31075 VOL4                           ORCL:OCR_VOL4
OCRNEW                             102396        101470      31376      31077 VOL5                           ORCL:OCR_VOL5
OCRNEW                             102396        101470      39644      39318 VOL6                           ORCL:OCR_VOL6
DATA                              4095976       1561759    1023994     390437 DATA_VOL01                     ORCL:DATA_VOL01
DATA                              4095976       1561759    1023994     390440 DATA_VOL02                     ORCL:DATA_VOL02
DATA                              4095976       1561759    1023994     390443 DATA_VOL03                     ORCL:DATA_VOL03
DATA                              4095976       1561759    1023994     390439 DATA_VOL04                     ORCL:DATA_VOL04
BACK                              3071982       3070868    1023994    1023622 BACK_VOL01                     ORCL:BACK_VOL01

12 删除旧ASM盘配置信息
[root@oracle1 bin]# oracleasm listdisks
BACK_VOL01
BACK_VOL1
DATA_VOL01
DATA_VOL02
DATA_VOL03
DATA_VOL04
DATA_VOL05
DATA_VOL06
DATA_VOL1
DATA_VOL2
DATA_VOL3
DATA_VOL4
DATA_VOL5
DATA_VOL6
OCR_VOL4
OCR_VOL5
OCR_VOL6

oracleasm deletedisk DAA_VOL1
oracleasm deletedisk DATA_VOL2
oracleasm deletedisk DATA_VOL3
oracleasm deletedisk DATA_VOL4
oracleasm deletedisk DATA_VOL5
oracleasm deletedisk DATA_VOL6
oracleasm deletedisk BACK_VOL1
oracleasm deletedisk OCR_VOL1
oracleasm deletedisk OCR_VOL2
oracleasm deletedisk OCR_VOL3

[root@oracle2 bin]# oracleasm scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Cleaning disk "BACK_VOL1"
Cleaning disk "DATA_VOL1"
Cleaning disk "DATA_VOL2"
Cleaning disk "DATA_VOL3"
Cleaning disk "DATA_VOL4"
Cleaning disk "DATA_VOL5"
Cleaning disk "DATA_VOL6"
Scanning system for ASM disks...
You have new mail in /var/spool/mail/root

[root@oracle2 bin]# oracleasm listdisks
BACK_VOL01
DATA_VOL01
DATA_VOL02
DATA_VOL03
DATA_VOL04
DATA_VOL05
DATA_VOL06
OCR_VOL4
OCR_VOL5
OCR_VOL6
至此整个旧存储数据全部迁移到新的存储上了。



分享文章：oracleRAC更换存储迁移数据
地址分享：http://cxhlcq.com/article/ggcehg.html