Yes . . . exactly.
>From reading about the EMC DL700, it truly emuilates tape libraries, tape
drives and tape cartridges. Actually, it can concurrently emulate multiple
libraries (of the same kind of different kinds), different kinds of tape
drives (lto, dlt, etc), with emulated tape cartridges. You would have to
run reclamation on the emulated tape cartridges just like a real tape
system.
You could set it up and one big library and use tsm tape drive sharing to
share the virtual library/drives between several tsm instances, or, give
each tsm instance their own virtual library.
Rick
"Hart, Charles"
<[EMAIL PROTECTED] To: [EMAIL PROTECTED]
TRONIC.COM> cc:
Sent by: "ADSM: Subject: Re: D2D backup with TSM
Dist Stor
Manager"
<[EMAIL PROTECTED]
.EDU>
06/01/2004 05:06
PM
Please respond to
"ADSM: Dist Stor
Manager"
May be a dumb question but here it goes.... Using a D2D backup to a Virtual
Tape System does the backup application (TSM or Netbackup - We have
both...) create a Volume Name for each Virtual tape? (IE TSM Server to
server virtual volumes are assigned a volume name) If so could you end up
partially filled VT Volumes and hopefully you can run a reclaim if using
TSM, if not TSM you just have wasted Disk?
Hope that all made sense....
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] Behalf Of
Jim Sporer
Sent: Tuesday, June 01, 2004 2:37 PM
To: [EMAIL PROTECTED]
Subject: Re: D2D backup with TSM
We are going to try disk only backups using ATA storage. We've decided to
use use a FILE device class for the ATA storage pool and do the backups
directly to the ATA storage pool. We will back up the data to a copy
storage pool defined on a 3494 tape library. I know that this will involve
running reclamation on the ATA storage pool but we felt using a DISK device
class would waste to much storage because of fragmentation.
Jim Sporer
University of Wisconsin
At 10:05 PM 5/28/2004 -0400, you wrote:
>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
