Start & stop an instance RAC

Hello

I just created a 2 node 11 GR 2 database RAC, traditionally from databases not CARS I would just use sqlplus to start / stop the instance

Q1. What is the recommended way to start / stop an instance in a RAC environment? Do you use a cluster to do command, or is sqlplus is acceptable?

Q2. If you use sqlplus and more to stop an instance on a node, I presume that the cluster services is NOT as a failure and so don't try to restart the instance?

Q3. similiarly what is the best way to start / stop a listener on a particular node?

any help appreciated

Jim

Hello Jim,

Q1. What is the problem with the status not reflected in the output of clusterware resource? Is it to do with the ability of Services to acknowledge a failure and restart the CLuster service?

Response: The resource database is not parsed by SIR and if the database suddenly stops then none will try to restart the same.

Q2. Regarding the automatic closing of a database in a CCR environment (as opposed to the manual method which I asked on-) if I simply turn off the cluster nodes of my will which in turn stops the Instances and close the database RAC itself (when the last Instance is closed)?

For even if I turn on my knots, the first node start cluster, its instance and open the database?

Answer: well, if you turn off your server then of course the database and stop anything else running on the server. When the server is under tension and if crs autostart is enabled then the clusterware stack will come with the server

Q3. What is the difference between a Service and a resource of the cluster? Are the database, earphone etc services or resources? I'm just trying to understand why SVRCTL is used to manipulate the database and listener and not say CRSCTL?

Answer: You can configure a service which is part of tree resources of database and the resource database is a parent for the same thing. Services are used to connect to the database. Database, (if added) services, asm, listener, scan etc are all the resources of the clusterware, which are monitored by the clusterware.

You can refer to the Oracle documentation, which will give you more insight on these details

http://docs.Oracle.com/CD/E11882_01/RAC.112/e16794/TOC.htm

http://docs.Oracle.com/CD/E11882_01/RAC.112/e16795/TOC.htm

Kind regards

Vautrin - Oracle

Tags: Database

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