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Virtual Tape and DPM
I've started using DPM 2010 for DRing to another site. I've bought a cheapish Promise 16 disk ISCSI controller to hold the data and I'm about to buy 16 2T disks The server has 4.6T dedicated to DPM which is completely full with only 1 days backup.
The question is should I buy virtual tape software or just raid 5 all the disks?
cheers Mark
The question is should I buy virtual tape software or just raid 5 all the disks?
cheers Mark
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No. As I mentioned earlier the only reason to use Virtual Tapes would be if you intend to copy the backups to tape at a later stage. If there is no real tape drive involved don't bother with it.
I'd suggest looking at your restore times before treating DPM as a DR system rather than a backup system.
We use DPM for backing up Exchange and SQL but the Exchange is a geo split CCR cluster across two sites, and although the SQL is citical, the data size is onder 10GB. For our main file server (~7 TB live data) we currently use rsync to a Linux box at a secondary location (with samba for SMB/CIFS access), but have started to look at Archiware Presstore with the synchronise module as we could then be completely on Windows. We looked at DPM for file server backup, but to achieve our restore window we would have to have replaced our file server storage with a much faster disk system, and put in the same for DPM, running a live mirror was significantly less expensive and files are immediately accessible in a DR situation.
We use DPM for backing up Exchange and SQL but the Exchange is a geo split CCR cluster across two sites, and although the SQL is citical, the data size is onder 10GB. For our main file server (~7 TB live data) we currently use rsync to a Linux box at a secondary location (with samba for SMB/CIFS access), but have started to look at Archiware Presstore with the synchronise module as we could then be completely on Windows. We looked at DPM for file server backup, but to achieve our restore window we would have to have replaced our file server storage with a much faster disk system, and put in the same for DPM, running a live mirror was significantly less expensive and files are immediately accessible in a DR situation.
I gave the correct answer to your Question, you should accept it.
ASKER
There are several possible advantages to virtual tape
1: you can use compression
2: if you loose 1 disk (V tape) you won't currupt an entire disk pool (DPM puts bits of backup all across the disk pool)
3: you could pull disks in and out and store them much like tapes
You didn't give the correct answer
1: you can use compression
2: if you loose 1 disk (V tape) you won't currupt an entire disk pool (DPM puts bits of backup all across the disk pool)
3: you could pull disks in and out and store them much like tapes
You didn't give the correct answer
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ASKER
Thank you, answered my question :-)
ASKER
cheers Mark