Just to set realistic expectations... To date, no backup software vendor
has offered dedupe that has anywhere near the speed that is offered by
the VTL/IDT (intelligent disk target) market.  The backup software
dedupe products run at 10s of MB/s, MAYBE 100 MB/s, but that's it.  The
VTL/IDTs START at 300 MB/s and go up to 1000s MB/s.  I wish the best for
IBM in this regard, as I am a big fan of dedupe, but history is not in
their favor.  In addition, the other software companies that did this
did so by acquisition.  It appears that IBM is going to do it
themselves.  That's much harder.

That is, unless, the rumored acquisition of Diligent ever happens...

---
W. Curtis Preston
Backup Blog @ www.backupcentral.com
VP Data Protection, GlassHouse Technologies 

> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
Of
> Colwell, William F.
> Sent: Wednesday, April 16, 2008 10:15 AM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: [ADSM-L] TSM being abandoned?
> 
> I have been configuring a new TSM server since last November.  At
first
> I wanted a VTL.  But when I learned from the Oxford symposium
> presentations
> that TSM would have its own dedup in version 6,
> and considering the cost of the vtl, I ditched it and ordered a lot
more
> of SATA arrays for less money.
> 
> I think in a few years after v6 is widely installed, VTL's won't look
so
> good
> for TSM sites.  Assuming it all works of course.
> 
> your VTL vendor may just have been whistling past the graveyard.
> 
> Bill Colwell
> 
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
Of
> Paul Zarnowski
> Sent: Wednesday, April 16, 2008 12:08 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: TSM being abandoned?
> 
> Deduplicating VTLs fit better into NBU sites.  TSM's progressive
> incremental methodology already reduces the data stream, making
deduping
> VTLs less of a "win", though it can still be beneficial.  My point is
> that
> VTL vendors may not look as positively on TSM as they do on other
> less-efficient backup solutions, because they don't sell as much VTL
> product to them.  IMHO.
> ..Paul
> 
> > A VTL vendor said he is seeing a number of mid-sized businesses
> > migrating from TSM to NBU (Symantec). Do you think this is true? My
> > concern is that the pool of support techs will shrink and put us in
a
> > bind.
> >
> > Regards,
> > Orin
> >
> > Orin Rehorst
> > Port of Houston
> >
> 
> 
> 
> 
> 
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