Re: [Veritas-bu] NBU media server cluster

Have to agree with Ed partly on this.

I sometimes find if the cluster fails (and its extremeley rare) I may end with a status 2 or status 6. Depending on how the window is configured and the number of retries and the frequency, will determine if the backup attempts again.

Simon

From: veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Ed Wilts
Sent: Thursday, June 11, 2009 4:46 AM
To: Mark ..
Cc: VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] NBU media server cluster

On Wed, Jun 10, 2009 at 10:31 PM, Mark .. <polyfuze_4336 AT yahoo DOT com> wrote:

Will it continue to backup if one of the node failed?

No - the backup will abort but NetBackup will automatically restart failed jobs. Your job log may show a stream start, fail, and then try 2 will pick up the job on the new host. Depending on exactly how you're doing your backups and what you have for checkpoints, you may not even lose most of the work you've done before you had the cluster transition.

I would assume, though, that you're not doing a lot of cluster transitions... If so, backups aren't your biggest problem :-)

--- On Wed, 6/10/09, Ed Wilts <ewilts AT ewilts DOT org> wrote:

From: Ed Wilts <ewilts AT ewilts DOT org>
Subject: Re: [Veritas-bu] NBU media server cluster
To: "Mark .." <polyfuze_4336 AT yahoo DOT com>
Cc: VERITAS-BU AT mailman.eng.auburn DOT edu
Date: Wednesday, June 10, 2009, 8:18 PM

On Wed, Jun 10, 2009 at 10:10 PM, Mark .. <polyfuze_4336 AT yahoo DOT com> wrote:

I would love to seek your assistance and opinions on this setup. I have two SQL server nodes clustered using Microsoft Cluster. Version of DB and OS is SQL 2007 and Windows Ent 2008 x64.

On each node, there are two DB instance, DB A and DB B, DB A will be active on Node 1 and DB B will will be passive mode on Node 1. On Node 2 DB B is active while DB A is passive. Its kind of a cross active-passive cluster setup.

My question is what is the best approach to backup both DB in a clustered NBU media server configuration? Can NBU services failover to the other node in case of disaster and resume backup as per normal?

What you need to do is define a virtual backup address that floats across the cluster nodes with the database. So, you probably already have something like dba.systems.example.com. Add dba.backup.example.com and have both addresses sit in the same cluster group. Then tell NetBackup to back up dba.backup.example.com.

You would do the same thing for an Exchange or file-serving cluster.

The thing to watch for is the cluster group dependency - you have to determine if you want the database to transition to the other node if your backup network goes down and only you can know if that's what you want.

.../Ed

Ed Wilts, RHCE, BCFP, BCSD, SCSP, SCSE
ewilts AT ewilts DOT org

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