Yes, one of the two. If TSM deduplication is enabled and the target is a virtual tape, i doubt if the VTL can deduplicate anything from the write data.
-------------------------------------------- On Thu, 6/12/14, Ehresman,David E. <[email protected]> wrote: Subject: Re: [ADSM-L] TSM and VTL Deduplication To: [email protected] Date: Thursday, June 12, 2014, 12:51 PM 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:[email protected]] On Behalf Of Dan Haufer Sent: Thursday, June 12, 2014 2:41 PM To: [email protected] 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 <[email protected]> wrote: Subject: Re: [ADSM-L] TSM and VTL Deduplication To: [email protected] 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" <[email protected]> À: [email protected] 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:[email protected]] On Behalf Of Prather, Wanda Sent: Thursday, June 12, 2014 7:15 AM To: [email protected] 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:[email protected]] On Behalf Of Dan Haufer Sent: Thursday, June 12, 2014 9:48 AM To: [email protected] Subject: Re: [ADSM-L] TSM and VTL Deduplication Understood. Thanks ! -------------------------------------------- On Thu, 6/12/14, Ehresman,David E. <[email protected]> wrote: Subject: Re: [ADSM-L] TSM and VTL Deduplication To: [email protected] 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
