If it is a file device class with dedup turned off, yes.

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Mark Mooney
Sent: Tuesday, June 21, 2011 2:29 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Deduplication and Collocation

So data is deduplicated in a disk storage pool but when it is written to tape 
the entire reconstructed file is written out?  Is this the same for file device 
classes?


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Andrew Carlson
Sent: Tuesday, June 21, 2011 8:22 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Deduplication and Collocation

Tape pools are not de-duped, so that is not a consideration.

On Tue, Jun 21, 2011 at 13:17, Mark Mooney <mmooney AT aisconsulting DOT net> 
wrote:
> Hello,
>
> I had a student ask me today "What happens if you have collocation turned on 
> for a storage pool that you are deduplicating?"  I did not know what to 
> answer because in my mind I thought "well, if the data is collocated then I 
> need to have a copy of that data on that client's tape, otherwise I am going 
> to be mounting another client's tape to get back a de-duped piece of data 
> which would negate the collocation"
>
> I'm looking at the redbooks for this but I only see 6.1 and in 6.2 
> they added client side dedup as well (which I also have questions
> about)
>
> Can anyone shed some light on this?
>
> Thanks!
> Mooney
>
>



--
Andy Carlson
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