In sweet memories of my ever loving brother "kutty thambi " ARUN KUMAR

Saturday, December 26, 2009

OCRCHECK in CLUSTERWARE, RAC

What is an OCRCHECK utility?
An ocrcheck utility is a diagnostic tool used for diagnosing OC(Oracle Cluster Registry) Problems.This is used to verify the Oracle Cluster Registry(OCR) integrity.
What does an ocrcheck display?
The OCRCHECK utility displays the version of the OCR’s block format, total space available and used space, OCRID, and the OCR locations that we have configured.
How does ocrcheck perform integrity check?
OCRCHECK performs a block-by-block checksum operation for all of the blocks in all of the OCRs that we have configured. It also returns an individual status for each file as well as a result for the overall OCR integrity check.
Give a sample output of ocrcheck utility:-
Sample of the OCRCHECK utility output:
Status of Oracle Cluster Registry is as follows :
Version : 2
Total space (kbytes) : 262144
Used space (kbytes) : 16256
Available space (kbytes) : 245888
ID : 1918913332
Device/File Name : /dev/raw/raw1
Device/File integrity check succeeded
Device/File Name : /dev/raw/raw2
Device/File integrity check succeeded
Cluster registry integrity check succeeded

Where does an ocrcheck utility create a log file?
OCRCHECK creates a log file in the directory CRS_home/log/hostname/client.
How can we change the amount of logging?
To change amount of logging, edit the file CRS_home/srvm/admin/ocrlog.ini.


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