Cluster Control utility performs various administrative operation of oracle clusterware. It is located in $ORA_CRS_HOME/bin and must be executed by the “root” user.
[root@rac1 bin]# ./crsctl check crs
CSS appears healthy
CRS appears healthy
EVM appears healthy
[root@rac1 bin]# ./crsctl check cssd
CSS appears healthy
[root@rac1 bin]# ./crsctl check crsd
CRS appears healthy
[root@rac1 bin]# ./crsctl check evmd
EVM appears healthy
[root@rac1 bin]# ./crsctl start crs
Attempting to start CRS stack
The CRS stack will be started shortly
[root@rac1 bin]# ./crsctl stop crs
Stopping resources.
Successfully stopped CRS resources
Stopping CSSD.
Shutting down CSS daemon.
Shutdown request successfully issued.
[root@rac1 bin]# ./crsctl disable crs
f. To enable oracle clusterware:
[root@rac1 bin]# ./crsctl enable crs
[root@rac1 bin]# ./crsctl get css
for example: to get value of misscount parameter
[root@rac1 bin]# ./crsctl get css misscount
60
[root@rac1 bin]# ./crsctl set css
for example: to set value of misscount parameter
[root@rac1 bin]# ./crsctl set css misscount 120
Configuration parameter misscount is now set to 120.
[root@rac1 bin]# ./crsctl unset css
for example: to unset value of misscount parameter
[root@rac1 bin]# ./crsctl unset css misscount
Configuration parameter misscount is now undefined.
[root@rac2 bin]# ./crsctl lsmodules css
The following are the CSS modules ::
CSSD
COMMCRS
COMMNS
2. CRS_STAT:
It reports the current state of resources configured in the OCR.
[oracle@rac1 bin]$ ./crs_stat -t
Name Type Target State Host
———————————————————————————–
ora….C1.inst application ONLINE ONLINE rac1
ora….C2.inst application ONLINE ONLINE rac2
ora….AC1.srv application ONLINE ONLINE rac1
ora.RAC.abc.cs application ONLINE ONLINE rac1
ora.RAC.db application ONLINE ONLINE rac2
ora….AC1.srv application ONLINE ONLINE rac1
ora….ice2.cs application ONLINE ONLINE rac1
ora….AC1.srv application ONLINE ONLINE rac1
This command used to stop resource or cluster member.
[root@rac1 bin]# ./crs_stop ora.rac1.ons
Attempting to stop `ora.rac1.ons` on member `rac1`
Stop of `ora.rac1.ons` on member `rac1` succeeded.
This command used to start resource or cluster member.
[root@rac1 bin]# ./crs_start ora.rac1.ons
Attempting to start `ora.rac1.ons` on member `rac1`
Start of `ora.rac1.ons` on member `rac1` succeeded.
It dumps the contents of OCR into a text file.
[root@rac1 bin]# ./ocrdump /home/oracle/ocr.dmp
It verifies the integrity of the OCR.
[root@rac2 bin]# ./ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 2
Total space (kbytes) : 5237072
Used space (kbytes) : 9360
Available space (kbytes) : 5227712
ID : 794527192
Device/File Name : /apps/oracle/oradata/ocr
Device/File integrity check succeeded
Cluster registry integrity check succeeded
It perform various administrative operation on the OCR.