I am seriously looking at changing to a D2D system. I know of other people doing it with different backup software. I know of no reason not to do it with TSM. I am not sure if I am going to use the ATA disk array as the primary disk pool or a seconday disk pool behind SHARK disk. I would rather use it as the primary. I watched a presentation of a company that is using NEXSAN's ATA-BEAST as primary disk pool. They said they are getting better than 100GB an hour and the disk is not the bottle neck. The company was not using TSM though. The NEXSAN disk seems to be much cheaper than everyone else's ATA arrays. I believe faster to (70MB/sec). My issue is our TSM server is running on the mainframe and I must find some sort of adapter to connect ESCON to Fibre channel. Matt
-----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Richard Rhodes Sent: Friday, May 28, 2004 10:05 PM To: [EMAIL PROTECTED] Subject: D2D backup with TSM We recently had a presentation from EMC. During this presentation they discussed their new DL700 virtual tape library. It got people talking about a long term strategy of moving to a all disk based backup system. So we started thinking of the pros and cons of how to go about setting up TSM for a disk based backup system. Here are some initial thought on ways to configure TSM for D2D backups. We would be very interested in your thoughts/comments. I doubt we are the only people thinking about this topic. 1)Purchase a very large disk system (ata drives?) and put storage pools on them. - use a standard DISK device pool for backups - how to reclaim space? do you even need to? - fragmentation problems? - multiple node access concurrently - use a FILE device based pool - single node access per disk file volume - need to run reclamation - still stage to disk and migrate to FILE device based pool? - use a tape copy pool for offsite and backup - use a offsite disk pool somehow - iscsi over lan or fc if close enough (enough throughput?) - other? - must use client compression to get data compressed - we mostly don't do this today 2) Purchase a virtual tape system like the DL700 (bundle of a EMC Clariion and a FalconStor vts appliance) - provides compression for data - appliance is responsible for layout and use of disk space - can copy a virtual tape to a real physical tape for offsite storage Thanks Rick
