Hi,

I think that the backup will be started only from one proxy node. And thus not 
load balanced across the servers that are member from the GPFS. And what is 
even worse, the restore cannot be load balanced across multiple servers. In 
case of a disaster recovery, a lot of TB's must be restored. Here it certainly 
would help if TSM would load balance it across nodes. If all servers have 
dedicated FC HBA's to the tape library and enough tape drives are available, 
the process could be accelerated a lot here. 

In our setup, we spread the backup manually across the nodes that are member of 
the GPFS cluster. And the backup is started by using a virtualnodename instead 
of the proxy node setup that is discussed in the technote. So the backup is for 
TSM also a 1 'virtual' node backup, although it is started from multiple 
physical nodes. Does the proxy setup offers other advantages?

best regards,
Kurt 


-----Original Message-----
From: ADSM: Dist Stor Manager on behalf of Skylar Thompson
Sent: Sat 10/21/2006 6:56 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Backing up very large Filesystems...
 
Bernaldo de Quiros, Iban 1 wrote:
> Hi Skylar,
>
> Thanks for you answer, very useful but I have got a silly question:
>
> Using the proxy relationship do we know if TSM is going to spread the work 
> accross all the nodes of the cluster of just only above the nodes that have 
> enable the scheduler ¿?
>
> Thanks for your help,
>
>   

The manual really isn't clear on this, and I haven't explored it too
much since our GPFS cluster doesn't change all that much day-to-day. The
manual seems to imply that it does, but I haven't tested it out.

-- 
-- Skylar Thompson (skylar2 AT u.washington DOT edu)
-- Genome Sciences Department, System Administrator
-- K324, (206)-685-7354
-- University of Washington Medical Center

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