DanBrother的部落格

The following techniques are used to validate the integrity of Oracle Cluster configuration files, namely OCR and voting disks.
1. Check the ocssd.log for voting disk issues. (run as grid user)
# grep voting $Grid_home/log/hostname/cssd/ocssd.log

2. Use the cluvfy utility to check the integrity of the OCR. (run as grid user)
# cluvfy comp ocr -n all -verbose

3. Use the ocrcheck command to check the integrity of the OCR. (run as root user)
# $Grid_home/bin/ocrcheck

crs_stat command usage :
Examine Clusterware Status In a Tabular Format:
# crs_stat -t
Examine Clusterware Parameter Settings:
# crs_stat -p
Examine Clusterware Permissions and Ownership:
# crs_stat -ls

Oracle Clusterware includes two important components:
1. Voting disk:  A file that manages information about node membership
2  OCR (Oracle Cluster Registry): A file that manages cluster and Oracle RAC database configuration information.
These files can be stored on ASM (Automatic Storage Management) or a cluster filesystem.
[Reference]
http://docs.oracle.com/cd/B28359_01/rac.111/b28252/adminoc.htm

Oracle Clusterware automatically creates OCR backups every 4 hours.
At any one time, Oracle Clusterware always retains the latest 3 backup copies of the OCR that are 4 hours old, 1 day old, and 1 week old.
Command for viewing Available OCR Backups:
ocrconfig -showbackup

[Reference] http://docs.oracle.com/cd/B28359_01/rac.111/b28252/adminoc.htm#BEJHGHFD

Stop CRS:
crsctl stop crs (normal)
crsctl stop crs -f (force)

Start CRS:
crsctl start crs

Checking Resource Status for CRS: (replaces crs_stat -t -v in Oracle11gR2)
crsctl status resource -t or
crsctl stat res -t or
crsctl stat res -t -init (only local node status)
** Different resources can be filtered by the following commands:
crsctl stat res -t -w "TYPE = ora.database.type" (Database)
crsctl stat res -t -w "TYPE = ora.asm.type" (ASM)
crsctl stat res -t -w "TYPE = ora.scan_listener.type" (Scan Listener)
crsctl stat res -t -w "TYPE = ora.scan_vip.type" (Scan VIP)
crsctl stat res -t -w "TYPE = ora.cvu.type" (Cluster Verification Utility)

ps. equal sign (=) should have space in between