Hello Preston,


Our SN's are Sun x4500's with a zfs pool which contain (presently) three
AFTD's under one mount point. The extra AFTD's would also share that
area.
 
We believe it's possible there's a bottleneck reading from disk as we
stage and clone. At times we have lots of outstanding cloning runs
waiting for the RO device while staging happens. 

Adding more AFTD's would (at least in theory) increase the ability to
read from disk. 

Cheers
Nick

-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Preston de Guise
Sent: 05 September 2008 10:15
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Multiple AFTD's -limitations?

Hi Nick,

On 05/09/2008, at 19:03 , N.J.Tustain wrote:

> Does anyone have experience of problems/limitations in networker when
> using multiple AFTD's? Or other area's of consideration when  
> increasing
> the number of AFTD's.
>
> We presently use 3 on one SN and 4 on the other. We are considering
> increasing this number by at least one on each, maybe more and will be
> buying extra drives to accommodate with staging/clonning.

What you're planning shouldn't present any real problems, so long as  
you have the bandwidth within the storage environment to accommodate  
the additional disk backup units - e.g., if they're being presented  
from a SAN, make sure that the SAN is going to be able to readily  
support the additional disk backup units.

I've worked with plenty of sites with a much larger number of disk  
backup units, both on the backup server and storage nodes, so there's  
no limitations as such with the number you're looking at.

Cheers,

Preston.

--
Preston de Guise


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