RAC administration

Cluster Ready Services (CRS): is Oracle's clusterware software

CRS starts automatically when the server starts/rebooted planned/unplanned, it can be stopped this in the following conditions

Applying a patch set to CRS_HOME
O/S maintenance ( requies reboot)
Troubleshooting CRS problems

1) Starting CRS in 10gR2
$CRS_HOME/bin/crsctl start crs


2)Stopping CRS using Oracle 10g R2
$CRS_HOME/bin/crsctl stop crs

## Stopping CRS using Oracle 10g R1
srvctl stop -d database <database>
srvctl stop asm -n <node>
srvctl stop nodeapps -n <node>
/etc/init.d/init.crs stop

3)disabling/enabling CRS in 10g R2
$CRS_HOME/bin/crsctl [disable|enable] crs

## Oracle 10g R1
/etc/init.d/init.crs [disable|enable]

4)CRS status
$CRS_HOME/bin/crsctl check crs
$CRS_HOME/bin/crsctl check evmd
$CRS_HOME/bin/crsctl check cssd
$CRS_HOME/bin/crsctl check crsd
$CRS_HOME/bin/crsctl check install -wait 600

$CRS_HOME/bin/crs_stat
$CRS_HOME/bin/crs_stat -t
$CRS_HOME/bin/crs_stat -ls
$CRS_HOME/bin/crs_stat -p

Note:
-t more readable display
-ls permission listing
-p parameters


5)create profile for CRS
$CRS_HOME/bin/crs_profile

6)register/unregister application

$CRS_HOME/bin/crs_register
$CRS_HOME/bin/crs_unregister

7)Start/Stop an application
$CRS_HOME/bin/crs_start
$CRS_HOME/bin/crs_stop


8)Resource permissions
$CRS_HOME/bin/crs_getparam
$CRS_HOME/bin/crs_setparam

9)Relocate a resource
$CRS_HOME/bin/crs_relocate