My view on this is that database replication is a must.   Terrabytes of
data takes time to move, even with big hardware.   Having a warm standby
or clustered environment which gets transaction-level updates takes away a
huge part of the risk, especially when downtime is unacceptable.

Of course this does not alleviate the backup/restore needs, it just puts
less pressure on the backup/restore system.

-Jon

On Wed, 6 Mar 2002, Chris Brewer wrote:

> What about snapshots and BLIB (block level incremental backups). I've not
> used them (hope to soon), but the theory is intriquing as it has a very
> small data footprint and rapid recovery, among other things...
> 
> For official email, please respond to cgbrewer AT kpmg DOT com
> 
> Chris Brewer
> UNIX Systems Consultant
> Rocky Mountain Broadband Solution Center
> KPMG Consulting, Inc.
> 6399 S. Fiddler's Green Circle #400
> Greenwood Village, CO 80104
> 
> 720-493-7992
> 
> 
> 
> -----Original Message-----
> From: Rick Keahey [mailto:rickkeahey AT hotmail DOT com] 
> Sent: Wednesday, March 06, 2002 2:53 PM
> To: joe AT joe DOT net
> Cc: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: Re: [Veritas-bu] Disk to Disk Backups
> 
> 
> Ok, so here is my delima.  I have more and more customers coming to me 
> saying that they have a database that is mission critical and if it goes 
> down, they need to be able to restore it very quickly, within minutes or few
> 
> hours.  The problem is that these databases are expected to grow to several 
> terabytes in the next year or so.  Backups alone will take forever, but the 
> restores will be ugly.  We are using DLT's right now and are just starting 
> to use SDLT's.  I use NetBackup for backups software and do not have the 
> option to change off of that.  Disk base is really the only choice that I 
> have to look at from here, although I am not against looking at some other 
> means that will speed things up.
> 
> Thanks,
> Rick
> 
> 
> >From: Johnny Oestergaard <joe AT joe DOT net>
> >To: "Rick Keahey" <rickkeahey AT hotmail DOT com>
> >CC: veritas-bu AT mailman.eng.auburn DOT edu
> >Subject: Re: [Veritas-bu] Disk to Disk Backups
> >Date: Wed, 06 Mar 2002 22:11:09 +0100
> >
> >We have tried to do diskbackups to see if it's faster, but what we have 
> >seen is that is't faster to use tapes. Our disksubsystem is a STK 
> >SVA9500 and the tapedrives are STK 9940 all using FC
> >But if you use DLT it could be that it's faster to disk.
> >
> >I know about sites where they use STK VSM systems and that should be 
> >fast, but I have never tried that.
> >
> >/johnny
> >
> >At 11:34 06-03-2002 -0800, you wrote:
> >>I am researching different ways to do disk to disk backups for faster 
> >>backup and restore times.  Does anyone have any suggested hardware 
> >>platforms to do this on.  I know that ATL just announced a new 
> >>solution called the DX-30, but wanted to see if anyone else out there 
> >>knew of anything else that works as good.  Appreciate your input.
> >>
> >>Thanks,
> >>Rick
> >>
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> 
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