Author: Keith Arbogast <warbogas AT INDIANA DOT EDU>
Date: Thu, 10 Mar 2011 11:08:16 -0500
We are running TSM 6.2.2.2 on RHEL 5. It is my understanding that all the space used by a virtual volume is kept until every file on it has been expired. Virtual volumes don't shrink in size, just li
Author: "Schneider, Jim" <jschneider AT USSCO DOT COM>
Date: Thu, 10 Mar 2011 10:15:44 -0600
Yes. I use 'move data' to consolidate virtual filling volumes and reduce 'Pct Migr' in the storage pool. Judging by the time taken to move data, empty space is not moved. After the data is moved off
Author: "Hart, Charles A" <charles_hart AT UHC DOT COM>
Date: Thu, 10 Mar 2011 10:52:30 -0600
Also is you add the parameter Reconstruct=yes - It should move the data and not the white space ... Sorry. Move data does send volumes to 'scratch'. In the case of virtual volumes they are not reused
Author: "Schneider, Jim" <jschneider AT USSCO DOT COM>
Date: Thu, 10 Mar 2011 11:21:09 -0600
Keith, The status after the move is 'EMPTY.' I have an script that moves data off of 'filling' tapes. I found that while the percent utilization in a storage pool might be low, the percent migratable
Author: Shawn Drew <shawn.drew AT AMERICAS.BNPPARIBAS DOT COM>
Date: Thu, 10 Mar 2011 13:22:25 -0500
Why wouldn't normal reclamation be used for this? It's the automatic "move data" intended to consolidate empty space. As long as expiration is running on both source and target server space will be r
Author: "Schneider, Jim" <jschneider AT USSCO DOT COM>
Date: Thu, 10 Mar 2011 12:36:13 -0600
I was under the impression that reclamation only affected full volumes, not filling ones. I have had backups fail because of lack of space when % utilization was relatively low but % migratable was h
Author: Shawn Drew <shawn.drew AT AMERICAS.BNPPARIBAS DOT COM>
Date: Thu, 10 Mar 2011 15:18:01 -0500
I think it might be abnormal that you have filling virtual volumes. Are you using scratch in your virtual volume pool? or are you pre-defining the volumes? I use scratch volumes so it just creates ne
Author: Keith Arbogast <warbogas AT INDIANA DOT EDU>
Date: Thu, 10 Mar 2011 15:47:25 -0500
My specific problem is with a tape pool that is a target for virtual volumes created by a remote TSM server. The number of cartridges in use by the pool goes up and up, at a faster rate than the data
Author: "Hart, Charles A" <charles_hart AT UHC DOT COM>
Date: Thu, 10 Mar 2011 15:05:41 -0600
"The number of cartridges in use by the pool goes up and up" Do you have collation on? Check stgpool with f=d, if you don't have Collocate Set to NO it will default to Group then if no Colo Group exi
Keith, make sure you run reclamation on the virtual volume-based storage pool on your source server. By default, there is a deletion grace period of 5 days before the virtual volume (actually the arc
Author: Keith Arbogast <warbogas AT INDIANA DOT EDU>
Date: Thu, 10 Mar 2011 16:43:36 -0500
Shawn, Your mention of the 50 GB MAXCAP on the device class was a jolt. Ours is 1 TB, and I see that could be exacerbating the problem. The bigger virtual volumes are, the more space they lock and th
Author: Keith Arbogast <warbogas AT INDIANA DOT EDU>
Date: Thu, 10 Mar 2011 17:08:25 -0500
Joerg, The nut of the problem, if I have this right, is that virtual volumes aren't reclaimed the same way as physical volumes. They have to be 100% reclaimable before they return any space. Their pc
Author: Shawn Drew <shawn.drew AT AMERICAS.BNPPARIBAS DOT COM>
Date: Thu, 10 Mar 2011 17:44:37 -0500
They are reclaimed the same as physical volumes. Just like physical volumes, they need to be 100% empty before they return space and can be reused. The reclamation process will move the data off elig
Author: Erwann SIMON <erwann.simon AT FREE DOT FR>
Date: Fri, 11 Mar 2011 06:55:03 +0100
Hi All, My advice is to read closely this Joerg's message that gives all the answers ! Main points are : - 1 virtual volume on the source server equals 1 archive object on the target server - when a
Author: Shawn Drew <shawn.drew AT AMERICAS.BNPPARIBAS DOT COM>
Date: Fri, 11 Mar 2011 11:51:29 -0500
As mentioned before, you can force the active files off by performance reclamation on the volumes. That being said, the smaller the volumes are, the less reclamation you have to do, but the larger th
This is where one additional point comes to mind - that of the size of virtual volumes which is controlled with MAXCAP on the device class definition on the source server. You can change the value MA
Author: Keith Arbogast <warbogas AT INDIANA DOT EDU>
Date: Mon, 21 Mar 2011 10:15:45 -0400
"They are reclaimed the same as physical volumes. Just like physical volumes, they need to be 100% empty before they return space and can be reused. The reclamation process will move the data off eli