Re: [ADSM-L] Deduplication and Collocation
2011-06-21 15:59:33
Thank you Wanda! Much Appreciated!
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Prather, Wanda
Sent: Tuesday, June 21, 2011 9:09 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Deduplication and Collocation
https://www-304.ibm.com/support/docview.wss?context=SSGSG7&lang=all&rs=2077&wv=1&loc=en_US&cs=UTF-8&uid=swg27018576&q1=tste_webcast&dc=DA410
-----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 2:53 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Deduplication and Collocation
Cool, Thanks :) I have questions about client dedup. Do you know of any
redbook detail on that?
Thanks,
Mooney
"Prather, Wanda" <wPrather AT ICFI DOT COM> wrote:
Dedup only works in TSM storage pools that reside on disk (specifically
devtype=FILE pools).
If you have data that goes to a dedup pool, then gets migrated off to tape, it
is reduped (rehydrated, reinflated, whatever you want to call it.)
So collocation will still be in effect for that pool.
-----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 2:17 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Deduplication and Collocation
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
|
|
|