Both files are managed by the crsd daemon. Voting disk is used for monitoring information for the members of the cluster. OCR is the cluster configuration file and contains everything about the cluster such as list of nodes , mapping between nodes and instances, application profiles and etc.Both file must be located on share device with RAW,CFS,OCFS filesystems. In 10gR2 RAC Database these files can not be hosted in ASM.
Manage OCR files
First determine the ocr and ocrmirror location
Way 1:
[oracle@rac1 crs]$ ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 2
Total space (kbytes) : 262120
Used space (kbytes) : 4644
Available space (kbytes) : 257476
ID : 1900957196
Device/File Name : /ocfs-disk/ocr0.ora
Device/File integrity check succeeded
Device/File Name : /ocfs-disk/ocr1.ora
Device/File integrity check succeeded
Cluster registry integrity check succeeded
Way 2:
[oracle@rac1 ocfs-disk]$ cat /etc/oracle/ocr.loc
ocrconfig_loc=/ocfs-disk/ocr0.ora
ocrmirrorconfig_loc=/ocfs-disk/ocr1.ora
local_only=FALSE
Ensure you have backup
[oracle@rac1 crs]$ ocrconfig -showbackup
rac1 2011/07/07 22:00:25 /oracle/crs/oracle/product/10.2.0/crs/cdata/crs
rac1 2011/07/07 18:00:11 /oracle/crs/oracle/product/10.2.0/crs/cdata/crs
rac1 2011/07/07 14:00:10 /oracle/crs/oracle/product/10.2.0/crs/cdata/crs
rac1 2011/07/06 01:59:58 /oracle/crs/oracle/product/10.2.0/crs/cdata/crs
rac1 2011/06/27 02:43:25 /oracle/crs/oracle/product/10.2.0/crs/cdata/crs
Move OCR and OCR mirror in a new Location
The cluster is UP
*** su - oracle ***
cp /dev/null /ocfs-disk/OCR-DISKS/ocr1.ora
cp /dev/null /ocfs-disk/OCR-DISKS/ocr2.ora
*** su root ( using oracle's profile) ****
ocrconfig -replace ocr /ocfs-disk/OCR-DISKS/ocr1.ora
ocrconfig -replace ocrmirror /ocfs-disk/OCR-DISKS/ocr2.ora
chown root /ocfs-disk/OCR-DISKS/ocr1.ora
chown root /ocfs-disk/OCR-DISKS/ocr2.ora
[oracle@rac2 ~]$ ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 2
Total space (kbytes) : 262120
Used space (kbytes) : 4644
Available space (kbytes) : 257476
ID : 1900957196
Device/File Name : /ocfs-disk/OCR-DISKS/ocr1.ora
Device/File integrity check succeeded
Device/File Name : /ocfs-disk/OCR-DISKS/ocr2.ora
Device/File integrity check succeeded
Cluster registry integrity check succeeded
Post Actions after file Remove
- Remove the old files manually
- Export the new ocr
*** su root ( using oracle's profile) ****
ocrconfig -export /ocfs-disk/OCR-EXPORTS/ocrExp.dmp
Manage Voting files
First determine the current voting disks location
[root@rac2 OCR-EXPORTS]# crsctl query css votedisk
0. 0 /ocfs-disk/vot0.ora
1. 0 /ocfs-disk/vot1.ora
2. 0 /ocfs-disk/vot2.ora
located 3 votedisk(s).
Backup the voting disks
*** su - oracle ***
dd if=/ocfs-disk/vot0.ora of=/ocfs-disk/VOT-BACKUP/vot0.ora.dmp bs=4k
dd if=/ocfs-disk/vot1.ora of=/ocfs-disk/VOT-BACKUP/vot1.ora.dmp bs=4k
dd if=/ocfs-disk/vot2.ora of=/ocfs-disk/VOT-BACKUP/vot2.ora.dmp bs=4k
Stop your rac system (databases,services, listener etc) using srvctl
Stop your crs as root
crsctl stop crs
as oracle
touch /ocfs-disk/VOT-DISKS/vdisk1.ora
touch /ocfs-disk/VOT-DISKS/vdisk2.ora
Use the touch since the file system is OCFS2
crsctl add css votedisk /ocfs-disk/VOT-DISKS/vdisk1.ora -force
Now formatting voting disk: /ocfs-disk/VOT-DISKS/vdisk1.ora
successful addition of votedisk /ocfs-disk/VOT-DISKS/vdisk1.ora.
crsctl add css votedisk /ocfs-disk/VOT-DISKS/vdisk2.ora -force
Now formatting voting disk: /ocfs-disk/VOT-DISKS/vdisk2.ora
successful addition of votedisk /ocfs-disk/VOT-DISKS/vdisk2.ora.
crsctl delete css votedisk /ocfs-disk/vot0.ora
crsctl delete css votedisk /ocfs-disk/vot1.ora
crsctl delete css votedisk /ocfs-disk/vot2.ora
[oracle@rac2 ~]$ crsctl query css votedisk
0. 0 /ocfs-disk/VOT-DISKS/vdisk1.ora
1. 0 /ocfs-disk/VOT-DISKS/vdisk2.ora
crsctl start crs
Metalink References
OCR / Vote disk Maintenance Operations: (ADD/REMOVE/REPLACE/MOVE) [ID 428681.1]
Failed to Start CRS stack After Adding a New Voting Disk [ID 460874.1]
Web Reference
