RAC backup procedure failover

We have Oracle 11gR2 RAC database on two nodes. We also have a RMAN backup script that works fine, using a recovery catalog database which is located in a town 20km from the data center. The script for database backup works fine, and is started from crontab Job or from Oracle dbconsole (for now it works from crontab). A recovery procedure is checked and everything is working properly.
The problem is that the script runs from the first node in the cluster, and if the node is turned off, backup can't be run. How can we ensure that our script have a failover backup version. We also tried to do the backup over dbconsole but this only works if the node from which to start job was started.
Essentially the question is "How to ensure that our backup works, whether or not both nodes are active"

Hi,
SerPedjasim wrote:
We have Oracle 11gR2 RAC database on two nodes. We also have a RMAN backup script that works fine, using a recovery catalog database which is located in a town 20km from the data center. The script for database backup works fine, and is started from crontab Job or from Oracle dbconsole (for now it works from crontab). A recovery procedure is checked and everything is working properly.
The problem is that the script runs from the first node in the cluster, and if the node is turned off, backup can't be run. How can we ensure that our script have a failover backup version. We also tried to do the backup over dbconsole but this only works if the node from which to start job was started.
Essentially the question is "How to ensure that our backup works, whether or not both nodes are active"Don't use nodes of clusterware to start backup. You can use the host of recovery catalog database which is located in a town 20km.
Move all scripts of rman to host of recovery catalog and configure the scripts in crontab of host of recovery catalog. The RMAN works as client only the backup is always performed on server side.
Create a Service on RAC to RMAN connect (e.g RMAN_BACKUP). The service should run on nodes 1 of the RAC, but is able to run on node 2 or 3 if nodes 1 are not available. (If you use the default service name of RAC (name of database) and you are using parallelism the RMAN can start a session in each node and the backup be perfomed by all nodes at same time, this is not a problem, but you can have perfomance problems on your environment). Because that I recommend create a Service.
http://download.oracle.com/docs/cd/E11882_01/rac.112/e16795/hafeats.htm
Configure a net service name using the local naming method on host of recovery catalog.
If you are using SCAN Feature do this above, if not put all VIP hostnames on Address.
e.g:
RMAN_BACKUP =
(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = node-scan.oracle.com)(PORT = 1521))
     (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = RMAN_BACKUP)
)Regardless of the node that is active your backup will be started if a node is active
This will only work if you are performing online backup. I hope so.
Hope this helps,
Levi Pereira
Edited by: Levi Pereira on Aug 22, 2011 11:27 PM

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PROMPT *************************************************But it's provided without guarantee. It's been a long time i've not used it! And it might have bugs. Up to you to test it, backup is not a matter where you trust people :-)
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Edited to clean up the code from unnecessary blank lines...
Message was edited by:
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