Author: Keith Arbogast <warbogas AT INDIANA DOT EDU>
Date: Wed, 22 Aug 2007 12:02:16 -0400
I am not understanding the crucial advantage(s) of using virtual volumes to backup a data center to a remote site. Why not backup nodes in a remote data center to a TSM server in a local data center?
Author: Richard Rhodes <rrhodes AT FIRSTENERGYCORP DOT COM>
Date: Wed, 22 Aug 2007 13:47:14 -0400
Sure, do it, we backup many remote sites to our central datacenter. The question is, what is your DR strategy for the central datacenter where the TSM server is located? If that datacenter is destro
Author: Keith Arbogast <warbogas AT INDIANA DOT EDU>
Date: Wed, 22 Aug 2007 16:34:39 -0400
Richard, You asked thought provoking questions, but didn't answer mine. What is the compelling reason to use virtual volumes? Offsite copypools and certain restorability of the TSM database are essen
Well I would say, then, the reason for VV is to eliminate the need for real volumes: using virtual volumes on a remote TSM server eliminates the need to move real tape volumes to the remote server in
I think orinally, it was because intersite SCSI/FC was impossible or too expensive, while IP was "cheap". (Or maybe one TSM server had scsi tape drives and a second did not.) Virtual volumes are basi
Author: Stuart Lamble <adsm AT CAROUSEL.ITS.MONASH.EDU DOT AU>
Date: Thu, 23 Aug 2007 09:46:17 +1000
On 23/08/2007, at 7:29 AM, Nicholas Cassimatis wrote: And a TSM DB Backup takes (at least) one volume, so with physical cartridges, that's a whole tape. With VV's, you're only using the actual capaci
Author: Richard Rhodes <rrhodes AT FIRSTENERGYCORP DOT COM>
Date: Thu, 23 Aug 2007 08:00:35 -0400
Hi, again . . . I guess I don't quite understand the situation. You have a remote site with a server you want to backup to your TSM server. Then, you ask why you would need VV's back at the remote s
Author: Lawrence Clark <Larry_Clark AT THRUWAY.STATE.NY DOT US>
Date: Thu, 23 Aug 2007 09:26:35 -0400
I'm curious. We've never relied on storing the TSM db backup to tape. We backup to disk and rcp it to a 2nd site. That's seems the simplest method. Anyone else do the same? Hi, again . . . I guess I
Author: Keith Arbogast <warbogas AT INDIANA DOT EDU>
Date: Thu, 23 Aug 2007 09:40:28 -0400
Nicholas Cassimatis wrote: "With all of the features in TSM, there are a number of them that don't work for specific situations. Simultaneous writes on backup/ migration, virtual volumes, NDMP backup
Author: Keith Arbogast <warbogas AT INDIANA DOT EDU>
Date: Thu, 23 Aug 2007 10:13:58 -0400
Richard, I'm sorry I haven't made our situation clearer. In the current phase of the project we are building a TSM server in Bloomington to backup local clients to disk which will be migrated to virt
Author: Richard Rhodes <rrhodes AT FIRSTENERGYCORP DOT COM>
Date: Thu, 23 Aug 2007 10:57:49 -0400
Hi Keith, thanks for more details. Let me see if I fully understand . . . . Bloomington TSM-a local clients backup to disk pool disk pool migrates to TSM-b/VV at Indianapolis ==> primary tape pool i
Author: Richard Rhodes <rrhodes AT FIRSTENERGYCORP DOT COM>
Date: Thu, 23 Aug 2007 12:43:33 -0400
I said . . . While I'm munching on lunch, let met say a few words about this architecture. Our setup was very similar, except instead of backup local and migrating to the other site, we just backed u
Once you've sent data to a VV, (which looks like just-a-file to the target server) you can then copy it like any other file. Choose your exposure: (tape-failure-rate) * 1/number-of-db-tapes vs. ( ta
I'm having difficulty figuring out why this still feels not-answered to you. Perhaps the answer is best associated with a gradient of solution costs, measured over time. There are myriad different w
Author: Keith Arbogast <warbogas AT INDIANA DOT EDU>
Date: Thu, 23 Aug 2007 17:07:04 -0400
Rick, Yes, you understand very well. We will not have offsite copy pools until there are 3584's at both data centers. It is a huge concern for those who understand the implications. All the best, Kei
Author: Keith Arbogast <warbogas AT INDIANA DOT EDU>
Date: Fri, 24 Aug 2007 09:17:04 -0400
Rick, Yes, we see the exposure, but aren't the ones managing the budget. The completed DR architecture, when it's in place, will include onsite and off-site copies of both data centers. Thanks for yo
Author: Keith Arbogast <warbogas AT INDIANA DOT EDU>
Date: Fri, 24 Aug 2007 09:33:39 -0400
Allen, That statement, i.e. "...my dilemma", was more an justification of my original post than a commentary on the answers I had received. The simplest version of my question would have been, "What