實驗環境准備：
RHEL 6.5 + Oracle 11.2.0.4 RAC (2nodes)
- OCR和Voting Disk使用的是OCR1磁盤組，底層對應3個1G大小的共享LUN，一般冗余；
- DATA使用的是DATA1磁盤組，底層對應的是3個5G大小的共享LUN，外部冗余；
- FRA使用的是FRA1磁盤組，底層對應的是1個5G大小的共享LUN，外部冗余；
- 額外添加7個共享LUN(3個1G大小，4個5G大小)，用來模擬新的存儲映射出來的共享LUN；
我這里是使用Oracle VM VirtualBox 4.3虛擬機軟件模擬這個環境，
默認初始的RAC環境已經安裝完畢，且已經存有業務數據。
對於RAC環境的安裝可參考：
- Linux平台 Oracle 11gR2 RAC安裝Part1：准備工作
- Linux平台 Oracle 11gR2 RAC安裝Part2：GI安裝
- Linux平台 Oracle 11gR2 RAC安裝Part3：DB安裝
模擬的業務數據可參考 模擬業務最小測試用例01 第1～5步進行初始化。
初始的RAC環境配置信息：
#public ip
192.168.56.150 jyrac1
192.168.56.152 jyrac2
#private ip
10.10.10.11 jyrac1-priv
10.10.10.12 jyrac2-priv
#virtual ip
192.168.56.151 jyrac1-vip
192.168.56.153 jyrac2-vip
#scan ip
192.168.56.160 jyrac-scan
本次需求：
更換RAC的共享存儲，即把之前的存儲設備划出的共享LUN上的所有數據全部遷移新的存儲設備划分的LUN上。
具體就涉及到OCR，voting disk遷移，DATA遷移。
在我這里實驗具體就是指OCR1，DATA1，FRA1磁盤組的遷移。
一、准備工作
二、更換存儲
一、准備工作
1.1查看asm磁盤組
select name, TOTAL_MB, FREE_MB, state, type, COMPATIBILITY from v$asm_diskgroup; ``` SQL> select name, TOTAL_MB, FREE_MB, state, type, COMPATIBILITY from v$asm_diskgroup;NAME TOTAL_MB FREE_MB STATE TYPE COMPATIBILITY
DATA1 15360 13502 MOUNTED EXTERN 11.2.0.0.0
FRA1 5120 4790 MOUNTED EXTERN 11.2.0.0.0
OCR1 3072 2146 MOUNTED NORMAL 11.2.0.0.0
<h2 id="1.2">1.2查看asm的磁盤信息</h2>
select GROUP_NUMBER, DISK_NUMBER, TOTAL_MB, FREE_MB, NAME, PATH from v$asm_disk order by 1,2;
SQL> set linesize 1000
SQL> r
1* select GROUP_NUMBER, DISK_NUMBER, TOTAL_MB, FREE_MB, NAME, PATH from v$asm_disk order by 1,2
GROUP_NUMBER DISK_NUMBER TOTAL_MB FREE_MB NAME PATH
1 0 1024 714 OCR1_0000 /dev/asm-diskb
1 1 1024 716 OCR1_0001 /dev/asm-diskc
1 2 1024 716 OCR1_0002 /dev/asm-diskd
2 0 5120 4552 DATA1_0000 /dev/asm-diske
2 1 5120 4549 DATA1_0001 /dev/asm-diskf
2 2 5120 4549 DATA1_0002 /dev/asm-diskg
3 0 5120 4790 FRA1_0000 /dev/asm-diskh
7 rows selected.
<h2 id="1.3">1.3查看存儲設備信息，確定新的存儲</h2>
這里實驗環境是使用virtualbox模擬添加7個大小和之前一樣的共享存儲；
即分別為 1G大小的3個（OCR2），5G大小的3個（DATA1），5G大小的1個（FRA1）。
NewStorage1
NewStorage2
NewStorage3
NewStorage4
NewStorage5
NewStorage6
NewStorage7
在系統中就是/dev/sdi j k l m n o
udev綁定（兩個節點root執行）
--New Shared Disks
for i in i j k l m n o;
do
echo "KERNEL"sd*", BUS"scsi", PROGRAM"/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/$name", RESULT"/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/sd$i", NAME="asm-disk$i", OWNER="grid", GROUP="asmadmin", MODE="0660"" >> /etc/udev/rules.d/99-oracle-asmdevices.rules
done
udev綁定后對應就是asm-diski,j,k,l,m,n,o
start_udev （兩個節點root執行）
查看某個磁盤大小：
[root@jyrac1 ~]# fdisk -l /dev/asm-diski
Disk /dev/asm-diski: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
確定/dev/asm-diski，/dev/asm-diskj，/dev/asm-diskk對應的是新加的1G大小的3個盤
用於創建新的OCR2
<h1 id="2">二、更換存儲</h1>
<h2 id="2.1">2.1遷移OCR1到OCR2</h2>
### 2.1.1 創建新的OCR2磁盤組 ###
su – grid
sqlplus / as sysasm
CREATE DISKGROUP OCR2 NORMAL REDUNDANCY DISK '/dev/asm-diski', '/dev/asm-diskj', '/dev/asm-diskk' ATTRIBUTE 'compatible.asm'='11.2';
SQL> CREATE DISKGROUP OCR2 NORMAL REDUNDANCY DISK '/dev/asm-diski', '/dev/asm-diskj', '/dev/asm-diskk' ATTRIBUTE 'compatible.asm'='11.2';
Diskgroup created.
查看兩個節點是否添加了OCR2：
--節點1：
SQL> r
1* select name, TOTAL_MB, FREE_MB, state, type, COMPATIBILITY from v$asm_diskgroup
NAME TOTAL_MB FREE_MB STATE TYPE COMPATIBILITY
DATA1 15360 13502 MOUNTED EXTERN 11.2.0.0.0
FRA1 5120 4790 MOUNTED EXTERN 11.2.0.0.0
OCR1 3072 2146 MOUNTED NORMAL 11.2.0.0.0
OCR2 3072 2913 MOUNTED NORMAL 11.2.0.0.0
--節點2：
SQL> select name, TOTAL_MB, FREE_MB, state, type, COMPATIBILITY from v$asm_diskgroup
2 ;
NAME TOTAL_MB FREE_MB STATE TYPE COMPATIBILITY
DATA1 15360 13502 MOUNTED EXTERN 11.2.0.0.0
FRA1 5120 4790 MOUNTED EXTERN 11.2.0.0.0
OCR1 3072 2146 MOUNTED NORMAL 11.2.0.0.0
OCR2 0 0 DISMOUNTED 0.0.0.0.0
發現節點2需要手動mount新加的ASM磁盤組
sqlplus / as sysasm
SQL> alter diskgroup OCR2 mount;
Diskgroup altered.
### 2.1.2 添加OCR信息到OCR2 ###
more /etc/oracle/ocr.loc
ocrconfig -add +OCR2
ocrcheck -config
more /etc/oracle/ocr.loc
[root@jyrac1 ~]# more /etc/oracle/ocr.loc
ocrconfig_loc=+OCR1
local_only=FALSE
[root@jyrac1 ~]# ocrconfig -add +OCR2
[root@jyrac1 ~]#
[root@jyrac1 ~]# ocrcheck -config
Oracle Cluster Registry configuration is :
Device/File Name : +OCR1
Device/File Name : +OCR2
[root@jyrac1 ~]# more /etc/oracle/ocr.loc
Device/file getting replaced by device +OCR2
ocrconfig_loc=+OCR1
ocrmirrorconfig_loc=+OCR2
local_only=false
[root@jyrac1 ~]# ocrcheck && crsctl query css votedisk
Status of Oracle Cluster Registry is as follows :
Version : 3
Total space (kbytes) : 262120
Used space (kbytes) : 3116
Available space (kbytes) : 259004
ID : 1718040627
Device/File Name : +OCR1
Device/File integrity check succeeded
Device/File Name : +OCR2
Device/File integrity check succeeded
Device/File not configured
Device/File not configured
Device/File not configured
Cluster registry integrity check succeeded
Logical corruption check succeeded
STATE File Universal Id File Name Disk group
- ONLINE ab583d47c34a4f0ebfd46c8b04d7332b (/dev/asm-diskb) [OCR1]
- ONLINE 853e95652d994fe3bfdf21ca23e65dfc (/dev/asm-diskc) [OCR1]
- ONLINE 9f712a096a7b4f9bbfd811bff6462157 (/dev/asm-diskd) [OCR1]
Located 3 voting disk(s).
### 2.1.3遷移VOTE DISK到新創建的ASM磁盤組OCR2上 ###
crsctl replace votedisk +OCR2 （一個節點root執行）
先查詢：
SQL> select GROUP_NUMBER,NAME,STATE,type,TOTAL_MB,free_mb,VOTING_FILES,COMPATIBILITY from v$asm_diskgroup;
GROUP_NUMBER NAME STATE TYPE TOTAL_MB FREE_MB VO COMPATIBILITY
1 DATA1 MOUNTED EXTERN 15360 13502 N 11.2.0.0.0
2 FRA1 MOUNTED EXTERN 5120 4790 N 11.2.0.0.0
3 OCR1 MOUNTED NORMAL 3072 2146 Y 11.2.0.0.0
4 OCR2 MOUNTED NORMAL 3072 2244 N 11.2.0.0.0
替換為新添加的OCR2：
[root@jyrac1 ~]# crsctl replace votedisk +OCR2
Successful addition of voting disk 83f3dea9f4c24fccbf05eaa163c5c087.
Successful addition of voting disk ad21c1f0452e4f4abff906127ff9fcc3.
Successful addition of voting disk 2771819c65984f85bf366e74ee85781a.
Successful deletion of voting disk ab583d47c34a4f0ebfd46c8b04d7332b.
Successful deletion of voting disk 853e95652d994fe3bfdf21ca23e65dfc.
Successful deletion of voting disk 9f712a096a7b4f9bbfd811bff6462157.
Successfully replaced voting disk group with +OCR2.
CRS-4266: Voting file(s) successfully replaced
再查詢：
SQL> r
1* 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 VO COMPATIBILITY
1 DATA1 MOUNTED EXTERN 15360 13502 N 11.2.0.0.0
2 FRA1 MOUNTED EXTERN 5120 4790 N 11.2.0.0.0
3 OCR1 MOUNTED NORMAL 3072 2242 N 11.2.0.0.0
4 OCR2 MOUNTED NORMAL 3072 2148 Y 11.2.0.0.0
發現已經voting file已經在OCR2上，然后在兩個節點root查詢：
ocrcheck && crsctl query css votedisk
[root@jyrac1 ~]# ocrcheck && crsctl query css votedisk
Status of Oracle Cluster Registry is as follows :
Version : 3
Total space (kbytes) : 262120
Used space (kbytes) : 3116
Available space (kbytes) : 259004
ID : 1718040627
Device/File Name : +OCR1
Device/File integrity check succeeded
Device/File Name : +OCR2
Device/File integrity check succeeded
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
- ONLINE 83f3dea9f4c24fccbf05eaa163c5c087 (/dev/asm-diski) [OCR2]
- ONLINE ad21c1f0452e4f4abff906127ff9fcc3 (/dev/asm-diskj) [OCR2]
- ONLINE 2771819c65984f85bf366e74ee85781a (/dev/asm-diskk) [OCR2]
Located 3 voting disk(s).
[root@jyrac2 ~]# ocrcheck && crsctl query css votedisk
Status of Oracle Cluster Registry is as follows :
Version : 3
Total space (kbytes) : 262120
Used space (kbytes) : 3116
Available space (kbytes) : 259004
ID : 1718040627
Device/File Name : +OCR1
Device/File integrity check succeeded
Device/File Name : +OCR2
Device/File integrity check succeeded
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
- ONLINE 83f3dea9f4c24fccbf05eaa163c5c087 (/dev/asm-diski) [OCR2]
- ONLINE ad21c1f0452e4f4abff906127ff9fcc3 (/dev/asm-diskj) [OCR2]
- ONLINE 2771819c65984f85bf366e74ee85781a (/dev/asm-diskk) [OCR2]
Located 3 voting disk(s).
### 2.1.4 創建ASM實例spfile到新創建的OCR2 ASM磁盤組上 ###
一個節點grid用戶登錄ASM實例執行：
create pfile='/tmp/asmpfile.ora' from spfile;
create spfile='+OCR2' from pfile='/tmp/asmpfile.ora';
SQL> show parameter pfile
NAME TYPE VALUE
spfile string +OCR1/jyrac-scan/asmparameterf
ile/registry.253.919993739
SQL> create pfile='/tmp/asmpfile.ora' from spfile;
File created.
SQL> create spfile='+OCR2' from pfile='/tmp/asmpfile.ora';
File created.
SQL> show parameter pfile
NAME TYPE VALUE
spfile string +OCR1/jyrac-scan/asmparameterf
ile/registry.253.919993739
### 2.1.5 刪除OCR原位置ASM磁盤組OCR1 ###
一個節點root執行：
[root@jyrac1 ~]# ocrconfig -delete +OCR1
兩個節點root執行：
查看OCR和VOTE新狀態與位置
[root@jyrac1 ~]# ocrcheck && crsctl query css votedisk
[root@jyrac1 ~]# ocrconfig -delete +OCR1
[root@jyrac1 ~]# ocrcheck && crsctl query css votedisk
Status of Oracle Cluster Registry is as follows :
Version : 3
Total space (kbytes) : 262120
Used space (kbytes) : 3116
Available space (kbytes) : 259004
ID : 1718040627
Device/File Name : +OCR2
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
- ONLINE 83f3dea9f4c24fccbf05eaa163c5c087 (/dev/asm-diski) [OCR2]
- ONLINE ad21c1f0452e4f4abff906127ff9fcc3 (/dev/asm-diskj) [OCR2]
- ONLINE 2771819c65984f85bf366e74ee85781a (/dev/asm-diskk) [OCR2]
Located 3 voting disk(s).
節點2的ocrcheck輸出也沒問題，略。
### 2.1.6 重啟整個集群 ###
兩個節點root執行：
crsctl stop crs && crsctl start crs
### 2.1.7 將舊的磁盤組drop掉 ###
檢查參數文件：
SQL> show parameter pfile
NAME TYPE VALUE
spfile string +OCR2/jyrac-scan/asmparameterf
ile/registry.253.920008067
檢查磁盤組狀態：
Select GROUP_NUMBER,NAME,STATE,type,TOTAL_MB,free_mb,VOTING_FILES,COMPATIBILITY from v$asm_diskgroup;
select GROUP_NUMBER,DISK_NUMBER,STATE,REDUNDANCY,TOTAL_MB,FREE_MB,name,path,failgroup from v$asm_disk order by GROUP_NUMBER;
最后將舊的磁盤組mount並drop掉：
alter diskgroup OCR1 mount;
drop diskgroup OCR1 including contents;
SQL> alter diskgroup OCR1 mount;
Diskgroup altered.
SQL> drop diskgroup OCR1 including contents;
Diskgroup dropped.
注：舊的磁盤組只允許在一個節點mount，如果發現多個節點mount，需要在其他節點dismount，否則會刪除不掉舊的磁盤組。
<h2 id="2.2"> 2.2遷移DATA1 </h2>
### 2.2.1 數據磁盤組DATA1添加 ###
確定/dev/asm-diskl，/dev/asm-diskm，/dev/asm-diskn對應的是新加的5G大小的3個盤
用於數據磁盤組DATA1添加
alter diskgroup DATA1 add disk '/dev/asm-diskl' rebalance power 7;
alter diskgroup DATA1 add disk '/dev/asm-diskm', '/dev/asm-diskn' rebalance power 11;
SQL> alter diskgroup DATA1 add disk '/dev/asm-diskl' rebalance power 7;
Diskgroup altered.
SQL> alter diskgroup DATA1 add disk '/dev/asm-diskm', '/dev/asm-diskn' rebalance power 11;
Diskgroup altered.
這里說明可以單個添加，也可以多個添加。
### 2.2.2 查詢同步狀態 ###
set linesize 200
col NAME for a10
select name,allocation_unit_size,state,type,free_mb,required_mirror_free_mb req_mi_fr_mb,usable_file_mb
from v$asm_diskgroup;
### 2.2.3 刪除原存儲的LUN ###
所有磁盤添加進ASM磁盤組后，刪除原存儲的LUN。
查詢LUN path與asm_disk_name的對應關系
select name,path from v$asm_disk;
SQL> select name,path from v$asm_disk
NAME PATH
/dev/asm-diskc
/dev/asm-diskd
/dev/asm-disko
/dev/asm-diskb
OCR2_0001 /dev/asm-diskj
OCR2_0000 /dev/asm-diski
DATA1_0003 /dev/asm-diskl
DATA1_0004 /dev/asm-diskm
DATA1_0005 /dev/asm-diskn
OCR2_0002 /dev/asm-diskk
FRA1_0000 /dev/asm-diskh
DATA1_0001 /dev/asm-diskf
DATA1_0002 /dev/asm-diskg
DATA1_0000 /dev/asm-diske
14 rows selected.
確定是DATA1_0000，DATA1_0001，DATA1_0002
刪除磁盤組DATA1中舊存儲對應的LUN：
alter diskgroup DATA1 drop disk DATA1_0000 rebalance power 7;
alter diskgroup DATA1 drop disk DATA1_0001,DATA1_0002 rebalance power 7;
### 2.2.4 確認存儲置換完成 ###
select disk_number,path,total_mb,free_mb from v$asm_disk;
DISK_NUMBER PATH TOTAL_MB FREE_MB
0 /dev/asm-diskc 0 0
1 /dev/asm-diskd 0 0
2 /dev/asm-disko 0 0
3 /dev/asm-diske 0 0
4 /dev/asm-diskf 0 0
5 /dev/asm-diskg 0 0
6 /dev/asm-diskb 0 0
1 /dev/asm-diskj 1024 715
0 /dev/asm-diski 1024 717
3 /dev/asm-diskl 5120 4502
4 /dev/asm-diskm 5120 4499
5 /dev/asm-diskn 5120 4501
2 /dev/asm-diskk 1024 714
0 /dev/asm-diskh 5120 4790
14 rows selected.
<h2 id="2.3"> 2.3遷移FRA1</h2>
FRA1磁盤組和DATA1磁盤組的添加一樣，
alter diskgroup FRA1 add disk '/dev/asm-disko' rebalance power 7;
alter diskgroup FRA1 drop disk FRA1_0000 rebalance power 7;
select disk_number,path,total_mb,free_mb from v$asm_disk;
最后確定所有盤都置換完成：
SQL> select disk_number,path,total_mb,free_mb from v$asm_disk;
DISK_NUMBER PATH TOTAL_MB FREE_MB
0 /dev/asm-diskc 0 0
1 /dev/asm-diskd 0 0
3 /dev/asm-diske 0 0
4 /dev/asm-diskf 0 0
5 /dev/asm-diskg 0 0
6 /dev/asm-diskb 0 0
1 /dev/asm-diskj 1024 715
0 /dev/asm-diski 1024 717
1 /dev/asm-disko 5120 4943
3 /dev/asm-diskl 5120 4502
4 /dev/asm-diskm 5120 4499
5 /dev/asm-diskn 5120 4501
2 /dev/asm-diskk 1024 714
0 /dev/asm-diskh 5120 4965
14 rows selected.
SQL> r
1* select disk_number,path,total_mb,free_mb from v$asm_disk
DISK_NUMBER PATH TOTAL_MB FREE_MB
0 /dev/asm-diskc 0 0
1 /dev/asm-diskd 0 0
2 /dev/asm-diskh 0 0
3 /dev/asm-diske 0 0
4 /dev/asm-diskf 0 0
5 /dev/asm-diskg 0 0
6 /dev/asm-diskb 0 0
1 /dev/asm-diskj 1024 715
0 /dev/asm-diski 1024 717
1 /dev/asm-disko 5120 4790
3 /dev/asm-diskl 5120 4502
4 /dev/asm-diskm 5120 4499
5 /dev/asm-diskn 5120 4501
2 /dev/asm-diskk 1024 714
14 rows selected.
最終確定要替換的LUN都沒有數據了，主機側就可以操作了。
<h2 id="2.4"> 2.4測試 </h2>
查看集群各資源狀態：
crsctl stat res -t
查看OCR信息：
ocrcheck && crsctl query css votedisk
查詢ASM實例的spfile文件：
sqlplus / as sysasm <<EOF
show parameter pfile
EOF
查詢之前的業務數據：
-- 業務查詢SQL 1
select * from t1, t2 where t1.id = t2.t1_id and t1.n = 19;
-- 業務查詢SQL 2
select * from t1, t2 where t1.id = t2.t1_id;
至此，整個RAC環境更換存儲的實驗就全部完成了。