Useful commands to manage Oracle Grid Infrastructure / RAC (crsctl / srvctl)

Useful commands to manage Oracle Grid Infrastructure / RAC (crsctl / srvctl)
Useful commands to manage Oracle Grid Infrastructure / RAC (crsctl / srvctl)

In this article we will see some useful commands to manage databases installed on Oracle Grid Infrastructure. The Oracle Cluster Resources (CRS) we manage them through the tool CRSCTL and Oracle Database , Listener and Services with the tool SRVCTL.

Useful CRSCTL commands

All commands CRSCTL run by default with root user.

To start / stop Cluster Services on the server we are connected to:

crsctl start crs

crsctl stop crs

To stop/start Cluster Services on all servers:

crsctl stop cluster -all

crsctl start cluster -all

To see if the health of the Cluster Services on the local node:

crsctl check crs

To see the status of each Cluster Service running on all nodes:

crsctl status resource -t

Useful SRVCTL commands

All commands SRVCTL run by default with oracle user.

To see the database parameters:

srvctl config database -d racdb

To stop/start the database on all nodes:

srvctl stop database -d racdb 

srvctl start database -d racdb 

When we stop / start the base, we can also give an option (e.g. abort, mount):

srvctl stop database -d racdb -o immediate

srvctl start database –d racdb -o mount

To stop / start specific instance only:

srvctl stop instance -d racdb -i racdb2

srvctl start instance -d racdb -i racdb2

To remove a database from the Cluster:

srvctl remove database -d racdb -f -y

To add a database to the Cluster beyond its name we need the ORACLE_HOME and its location SPFILE:

srvctl add database -d racdb -o /oracle/nfs/app/oracle/product/ -p /oracle/oradata/racdb/racdb/spfileracdb.ora

To remove an instance from the Cluster:

srvctl remove instance -d racdb -i racdb2

To add an instance to the Cluster, in addition to the name of the instance we also need its hostname:

srvctl add instance -d racdb -i racdb2 -n oracledev2

If we want to stop / start the database to start automatically in the Cluster:

srvctl disable database -d racdb

srvctl enable database -d racdb

To stop / start listeners on nodes:

srvctl stop listener –n racdb1 , racdb2

srvctl start listener –n racdb1 , racdb2

To see the SCAN Listener parameters:

srvctl config scan_listener

For Database Services

To create a new service that will connect with priority to instance racdb1 but can also connect to racdb2 if something happens:

srvctl add service -d racdb -s REPORTING -r "racdb1" -a "racdb2" -P BASIC

To start / stop the service:

srvctl start service -d racdb -s REPORTING

srvctl stop service -d racdb -s REPORTING

To remove the service:

srvctl remove service -d racdb -s REPORTING

To modify a service to run only on instance racdb1:

srvctl modify service –d racdb –s REPORTING –n –i racdb1

To move a service running on racdb2 the connections to racdb1:

srvctl relocate service -d racdb -s REPORTING -i racdb2 -t racdb1

To check where a service is currently running:

srvctl status service -d racdb -s REPORTING

To make a service for Transparent Application Failover (TAF):

srvctl add service -db racdb -service racdb_taf -preferred racdb1 -available racdb2 -tafpolicy PRECONNECT -failovertype SELECT -q true

To start a service:

srvctl start service -db racdb -service racdb_taf

To see all the parameters of a service:

srvctl config service -d racdb -s racdb_taf
Useful commands to manage Oracle Grid Infrastructure / RAC (crsctl / srvctl)


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