Actually, the scenario he lays out is exactly the scenario where using
mpx'd restores actually helps.  It will allow the tape drive to stream
during the restore just like during the backups.  I've done this many
times, and there is no penalty.

 

I would fire every one of the 100 restores at the same time, using the
command line so that you can make sure they all happen within the
restore delay.  (Or you can increase the restore delay as suggested in
another post.) Then NBU will automatically do the 10 or so at a time
that were multiplexed together.

 

---

W. Curtis Preston

Author of O'Reilly's Backup & Recovery and Using SANs and NAS

VP Data Protection

GlassHouse Technologies

 

________________________________

From: veritas-bu-bounces at mailman.eng.auburn.edu
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of Steven
L. Sesar
Sent: Wednesday, May 02, 2007 1:27 PM
To: Anthony Tocco
Cc: VERITAS-BU at mailman.eng.auburn.edu
Subject: Re: [Veritas-bu] Quickest way to restore servers

 

Even though NBU "allows" this capability, I would expect that
simultaneously demuxing interleaved data from a piece of tape would be
extremely slow. I'ts been a while since we had tape in our environment,
so I I'm definitely not speaking from experience! :)

PS to the OP: If you're nut running VI3 with VCB, I would consider it.





Anthony Tocco wrote: 

thats not a true statement there is a way to restore multiple systems at
the same time.  There is a setting that say allow MULTIPLEX restores....


 

also if you dupe it to disk it still won't work the way you are thinking

 

________________________________

From: Steven L. Sesar
Sent: Wed 5/2/2007 15:49
To: VERITAS-BU at mailman.eng.auburn.edu
Subject: Re: [Veritas-bu] Quickest way to restore servers

Actually, I just read the last line of your post. It just might work if 
you dupe the media to disk. Try it.
 
 
 
netbackup-forum at backupcentral.com wrote:
> Need some help...my situation is this...had a major corruption on our
SAN which corrupted over 100 servers (VMs).  Many of the servers wrote
to the same tape (SSO / Multiplexing).  NBU 6.0 w/ MP4.  The issue I am
having is if 10 svrs wrote to that same tape, server 2 won't kickoff
until server 1 is done w/ that tape...is there a quicker way...
> 
> If I duplicate that tape to SAN disk, will I be able to pull muliple
data steams from that data?
> 
> 
> 
> 
> 
> _______________________________________________
> Veritas-bu maillist  -  Veritas-bu at mailman.eng.auburn.edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>   
 
 
-- 
===================================
 
   Steven L. Sesar
   Lead Operating Systems Programmer/Analyst
   UNIX Application Services R101
   The MITRE Corporation
   202 Burlington Road - MS K101
   Bedford, MA 01730
   tel: (781) 271-7702
   fax: (781) 271-2600
   mobile: (617) 519-8933
   email: ssesar at mitre.org
 
=================================== 
 
_______________________________________________
Veritas-bu maillist  -  Veritas-bu at mailman.eng.auburn.edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
  






-- 
===================================
 
   Steven L. Sesar
   Lead Operating Systems Programmer/Analyst
   UNIX Application Services R101
   The MITRE Corporation
   202 Burlington Road - MS K101
   Bedford, MA 01730
   tel: (781) 271-7702
   fax: (781) 271-2600
   mobile: (617) 519-8933
   email: ssesar at mitre.org
 
=================================== 
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