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
