Newsletters Archive - 2010

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  Resolve Duplicate CRS Cluster Name in EM Grid Control - (Grid Control 10g) — (11-August-2010)

During the installation of Oracle Clusterware, you are asked to specify a name
for the cluster. If you're like me, you may opt to keep the CRS Cluster Name 
set to its default value of "crs". Even when configuring a second or third 
Oracle RAC within an organization, we many times simply leave the cluster name 
for the new clusters set to their default value of crs. Although I believe it 
is bad practice to configure multiple Oracle RAC clusters with the same CRS 
cluster name, it doesn't necessarily cause any conflicts given these clusters 
don't interact with each other. The clustered databases work independently from 
each other without incident. That is, until you register multiple clustered 
databases with the same CRS cluster name in Oracle Enterprise Manager Grid 
Control!

An issue can arise when multiple Oracle RAC clusters with the same CRS cluster 
name are registered as targets in EM Grid Control. While not causing a problem 
with the cluster itself, it does cause EM Grid Control to think both clusters 
are the same.

The following article will explain the steps used to change the EM cluster 
target name(s) in Grid Control from their default name of "crs" to avoid 
conflict with other cluster targets. In this article, a new EM cluster target 
name will be created in EM Grid Control for two Oracle RAC database 
environments that were registered in EM Grid Control with the same EM cluster 
target name.

Resolve Duplicate CRS Cluster Name in EM Grid Control - (Grid Control 10g)

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Jeffrey M. Hunter, OCP
Sr. Database Administrator
jhunter@idevelopment.info
http://www.idevelopment.info
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