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分类: Oracle

2016-06-30 09:11:43

本人的操作环境:oracle database rdbms 11g rac on OEL5.5
查看一下表决磁盘和ocr的信息:
[root@rac1 bin]# pwd
/u01/app/11.2.0/grid/bin
[root@rac1 bin]# ./crsctl query css votedisk
##  STATE    File Universal Id                File Name Disk group
--  -----    -----------------                --------- ---------
 1. ONLINE   5122b184495d4fe9bf1fad29647807ba (ORCL:VOL1) [OCRVOTI]
Located 1 voting disk(s).
[root@rac1 bin]# ./ocrcheck
Status of Oracle Cluster Registry is as follows :
         Version                  :          3
         Total space (kbytes)     :     262120
         Used space (kbytes)      :       2700
         Available space (kbytes) :     259420
         ID                       :  268167937
         Device/File Name         :   +OCRVOTI
                                    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
查看当前ocr备份情况,ocr
[root@rac1 bin]# ./ocrconfig -showbackup

rac2     2014/03/25 12:04:28     /u01/app/11.2.0/grid/cdata/rac-cluster/backup00.ocr

rac2     2014/03/21 16:16:32     /u01/app/11.2.0/grid/cdata/rac-cluster/backup01.ocr

rac2     2014/03/21 12:16:31     /u01/app/11.2.0/grid/cdata/rac-cluster/backup02.ocr

rac2     2014/03/25 12:04:28     /u01/app/11.2.0/grid/cdata/rac-cluster/day.ocr

rac2     2014/03/19 14:26:16     /u01/app/11.2.0/grid/cdata/rac-cluster/week.ocr
可以进行手工备份:
[root@rac1 bin]# ./ocrconfig -local -manualbackup
rac1     2014/03/25 14:33:39     /u01/app/11.2.0/grid/cdata/rac1/backup_20140325_143339.olr

rac1     2014/03/25 10:34:33     /u01/app/11.2.0/grid/cdata/rac1/backup_20140325_103433.olr

rac1     2014/03/25 09:53:32     /u01/app/11.2.0/grid/cdata/rac1/backup_20140325_095332.olr

rac1     2014/03/25 09:53:18     /u01/app/11.2.0/grid/cdata/rac1/backup_20140325_095318.olr

rac1     2014/03/18 10:57:51     /u01/app/11.2.0/grid/cdata/rac1/backup_20140318_105751.olr

在asmcmd的md_backup命令备份磁盘组,顺便查看该磁盘组都存放什么??
[grid@rac1 ~]$ asmcmd -p
ASMCMD [+] > md_backup /home/grid/ocrvote2.bak -G OCRVOTI
Disk group metadata to be backed up: OCRVOTI
Current alias directory path: rac-cluster
Current alias directory path: rac-cluster/ASMPARAMETERFILE
Current alias directory path: rac-cluster/OCRFILE
也可以手工导出ocr内容
[root@rac1 bin]# ./ocrconfig -export /home/grid/ocr2.bak
我们可以破坏存放ocr的设备文件
[root@rac1 bin]# dd if=/dev/zero of=/dev/sdg bs=1024k count=1
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.002366 seconds, 443 MB/s
然哈停止集群:
[root@rac1 bin]# ./crsctl stop has
CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'rac1'
CRS-2673: Attempting to stop 'ora.crsd' on 'rac1'
CRS-2790: Starting shutdown of Cluster Ready Services-managed resources on 'rac1'
CRS-2673: Attempting to stop 'ora.oc4j' on 'rac1'
CRS-2673: Attempting to stop 'ora.LISTENER.lsnr' on 'rac1'
CRS-2673: Attempting to stop 'ora.OCRVOTI.dg' on 'rac1'
CRS-2673: Attempting to stop 'ora.registry.acfs' on 'rac1'
CRS-2673: Attempting to stop 'ora.test.db' on 'rac1'
CRS-2673: Attempting to stop 'ora.gsd' on 'rac1'
CRS-2677: Stop of 'ora.gsd' on 'rac1' succeeded
CRS-2677: Stop of 'ora.LISTENER.lsnr' on 'rac1' su 忽略。。。。。
我们在启动clusterware 发现无法启动了
[root@rac1 bin]# ./crsctl start has
CRS-4123: Oracle High Availability Services has been started.
[root@rac1 bin]# ./crsctl check crs
CRS-4638: Oracle High Availability Services is online
CRS-4535: Cannot communicate with Cluster Ready Services
CRS-4530: Communications failure contacting Cluster Synchronization Services daemon
CRS-4534: Cannot communicate with Event Manager

ocr和vote disk损坏恢复步骤大致如下:

1)停止所有节点clusterware
# crsctl stop crs
# crsctl stop crs -f
2)以root用户在其中一个节点独占模式启动clusterware
# crsctl start crs -excl -nocrs
备注:如果发现crsd在运行,那么通过如下命令将之停止。
# crsctl stop resource ora.crsd -init
3)创建新的存放ocr和vote disk的磁盘组,磁盘组名和原有的一致(如果想改变位置,需修改/etc/oracle/ocr.loc文件)
备注:如发现无法创建等情况,可以采用如下删除磁盘组等排错思路
SQL> drop diskgroup disk_group_name force including contents;
4)还原ocr,并检查
# ocrconfig -restore file_name
# ocrcheck
5)恢复表决磁盘,并检查
# crsctl replace votedisk +asm_disk_group
# crsctl query css votedisk
6)停止独占模式运行的clusterware
# crsctl stop crs -f
7)所有节点正常启动clusterware
# crsctl start crs
8)CVU验证所有RAC节点OCR的完整性
$ cluvfy comp ocr -n all -verbose

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