Re: [ADSM-L] TSM and VTL Deduplication

Unless you have a specific requirement, I would suggest you choose either TSM 
dedup to disk or go straight to virtual tape.  There is not usually a need to 
do both.

David

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Dan Haufer
Sent: Thursday, June 12, 2014 2:41 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] TSM and VTL Deduplication

Thanks for all the answers. So SSDs (Looking at  SSD caching) for the database 
storage and 10GB  per TB of total backup data on the safer side. 

--------------------------------------------
On Thu, 6/12/14, Erwann Simon <erwann.simon AT FREE DOT FR> wrote:

 Subject: Re: [ADSM-L] TSM and VTL Deduplication
 To: ADSM-L AT VM.MARIST DOT EDU
 Date: Thursday, June 12, 2014, 8:47 AM
 
 Hi,
 
 I'd rather say 6 to 10 times, or 10 GB of
 DB for each 1 TB of data (native, not deduped) stored.
 
 -- 
 Best
 regards / Cordialement / مع تحياتي
 Erwann SIMON
 
 -----
 Mail original -----
 De: "Norman
 Gee" <Norman.Gee AT LC.CA DOT GOV>
 À: ADSM-L AT VM.MARIST DOT EDU
 Envoyé: Jeudi 12 Juin 2014 16:55:29
 Objet: Re: [ADSM-L] TSM and VTL
 Deduplication
 
 Be prepare
 for your database size to double or triple if you are using
 TSM deduplication.
 
 -----Original Message-----
 From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]
 On Behalf Of Prather, Wanda
 Sent: Thursday,
 June 12, 2014 7:15 AM
 To: ADSM-L AT VM.MARIST DOT EDU
 Subject: Re: TSM and VTL Deduplication
 
 And if you are on the
 licensing-by-TB model, when it gets un-deduped (reduped,
 rehydrated, whatever), your costs go up!
 
 -----Original Message-----
 From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]
 On Behalf Of Dan Haufer
 Sent: Thursday, June
 12, 2014 9:48 AM
 To: ADSM-L AT VM.MARIST DOT EDU
 Subject: Re: [ADSM-L] TSM and VTL
 Deduplication
 
 Understood.
 Thanks !
 
 --------------------------------------------
 On Thu, 6/12/14, Ehresman,David E. <deehre01 AT LOUISVILLE DOT EDU>
 wrote:
 
  Subject: Re:
 [ADSM-L] TSM and VTL Deduplication
  To: ADSM-L AT VM.MARIST DOT EDU
  Date: Thursday, June 12, 2014, 5:33 AM
 
  If TSM moves data from a
  (disk) dedup pool to tape, TSM has to un-dedup
 the data as  it reads it