>>> Capo <tsm-fo...@backupcentral.com> 10/15/2010 4:35 AM >>> Hi all, I'm involved in a TSM + VTL project but, unfortunately, I'm quite new in TSM world: please apology me if I make trivial questions: My customer has currently got 4 TSM instances copying to a small disk pool and then to an IBM Tape library. They would like to introduce a VTL in the existing environment to improve overall performances and give TSM servers a little break.
My questions: 1. TSM catalog is growing too much. Would VTL help them to reduce its size ? No. The TSM DB keeps tracks of where things are. A VTL would not reduce its size. When data are copied offline (I suppose via a copy pool), does the catalog still keeps track of them? Yes 2. Physical tape generation from Virtual media is really important in this project: customer would like to keep fresh backups on VTL and old ones on tape. With other BU applications this would be quite easy but, since TSM has got a peculiar way to manage files (versions), I am a confused: do you think that defining the tape library as a copy pool is a good idea? I would recommend defining the VTL as a PRIMARY storage pool replacing the disk storage pool and the physical tape as a COPY storage pool. Then backup directly to VTL and make a copy each day to the physical tape. What level of granularity can I reach with the storage policies and copy pools? Can I simulate the lifecycle policy of other backup applications ? Can I tell migrate XX backup to tape after 1 month and remove it from the VTL and stuff like that ? 3. Any real life experience to share ? The candidates for this project are Centricstor and DXi 7500 (or the new DXi 8500). Thanks for your help Max +---------------------------------------------------------------------- |This was sent by max.c...@gmail.com via Backup Central. |Forward SPAM to ab...@backupcentral.com. +----------------------------------------------------------------------
