Manage OCR(Oracle Cluster Repository)

1. Backup

You must be logged in as the root user, because root owns the OCR files.

- To see the recent copy of OCR file

# ocrconfig -showbackup

export OCR file

# ocrconfig -export /oracle/backup/cluster/backup01.ocr -s online

2. Restore

import OCR file

If you should need to recover this file, the following command can be used.
# ocrconfig -import /oracle/backup/cluster/backup01.ocr

To see whether your OCR’s are in sync and healthy run an ocrcheck, which should return with “succeeded“, like below.

# ocrcheck Status of Oracle Cluster Registry is as follows : Version : 2 Total space (kbytes) : 280908 Used space (kbytes) : 4612 Available space (kbytes) : 276296 ID : 1065955458 Device/File Name : /dev/raw/ocr01.dat Device/File integrity check succeeded Device/File Name : /dev/raw/ocr02.dat Device/File integrity check succeededCluster registry integrity check succeeded

Retore from your OCR backup

You system automatically backup the OCR periodically. So, you can just resotre if it you need to.

# ocrconfig -restore /home/app/oracle/product/crs/cdata/crs/backup02.ocr

3. Add or replace OCR files

If you setup only one OCR file during the RAC configuration and need to add additional mirrored file(s). You can apply same rule to convert OCR raw devices into OCR block devices.(Please refer metalink doc 428681.1 for OCR/Vote disk maintenance Operations)

* This command replaces your primary OCR file with /dev/cciss/ocr01.dat
# ocrconfig -replace ocr /dev/cciss/ocr01.dat

* This command replaces your mirrored OCR file with /dev/cciss/ocr02.dat
# ocrconfig -replace ocrmirror /dev/cciss/ocr02.dat