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тАО09-20-2007 03:25 AM
тАО09-20-2007 03:25 AM
Listener and Backup/Restore
I am performing Backup and Restore tasks using the RMAN.
Do I need to verify wheter listener is running or not before performing Backup and Restore?
In a situation where listener is not running will the RMAN be not able to perform Backup and Restore?
Please let me know.
Thanks and regards,
Kaustubh Kane.
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тАО09-20-2007 03:46 AM
тАО09-20-2007 03:46 AM
Re: Listener and Backup/Restore
Hot backup, doesn't matter, that means the database can be running.
I did not make changes to the listener while using rman for backups and restores back when I was a more active DBA.
I would say based on experience, not to touch it.
You could always run a few tests.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
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тАО09-20-2007 03:47 AM
тАО09-20-2007 03:47 AM
Re: Listener and Backup/Restore
I think this link explains way better than me.
http://www.oracle.com/technology/pub/articles/saternos_scripting.html
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО09-21-2007 03:54 AM
тАО09-21-2007 03:54 AM
Re: Listener and Backup/Restore
The listener is the network front-end for database connections. The RMAN backups are, in the end, a client session that connects to the database. If RMAN uses a network based connection, the listener must be running. However, most RMAN scripts use an implicit bequeath connection (export ORACLE_SID then "connect target /"), which bypasses the network layer.
Depending on the RMAN configuration, you might also need catalog or auxiliary database connections. Since you can only have one implicit bequeath connection, you either need some games with TNSNAMES to establish these other sessions or just leave the listener running for standard network connections.
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тАО09-21-2007 06:57 AM
тАО09-21-2007 06:57 AM
Re: Listener and Backup/Restore
As for the question:
Would you see an error if a required listener is not up?
Answer: Yes.
For example: If someone or some process has a required listener down over here, then sure enough, any automated backups trying to hit those targets do fail with an error.
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тАО09-21-2007 08:21 AM
тАО09-21-2007 08:21 AM
Re: Listener and Backup/Restore
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тАО09-21-2007 10:13 AM
тАО09-21-2007 10:13 AM
Re: Listener and Backup/Restore
You can't have the listener down for an RMAN backup. They can NEVER require the listener to be down, because then they can't talk to the database to back it up.
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тАО09-23-2007 04:39 AM
тАО09-23-2007 04:39 AM
Re: Listener and Backup/Restore
As mentioned by all above, it depends on your configuration etc.
Case where you do not need the listener to be up on the 'TARGET' database.
rman target / catalog rman/passwd@catdb
Here you are on the machine as the database and running as the the Oracle user.
kind regards
yogeeraj