Veritas-bu

[Veritas-bu] Inline tape copy performance

2007-03-06 11:12:55
Subject: [Veritas-bu] Inline tape copy performance
From: pkeating at bank-banque-canada.ca (Paul Keating)
Date: Tue, 6 Mar 2007 11:12:55 -0500
I'm pretty sure it's split at the media server, unless anyone can
convince me different.
I see negligable difference in performance, however, you'll need to
factor in double the number of drives when you're configuring your
shared memory for the tape buffers.
 
ie, Max Shared Mem= number of buffers * size of buffers * number of
streams per drive * number of drives.
 
Paul
 
 
-- 

        -----Original Message-----
        From: veritas-bu-bounces at mailman.eng.auburn.edu
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of Santos,
Tarso D
        Sent: March 6, 2007 1:49 AM
        To: veritas-bu at mailman.eng.auburn.edu
        Subject: [Veritas-bu] Inline tape copy performance
        
        

        Hi all, 

        I am trying to understand how ITC works, Does it split the IO at
the media server or requires more client streams to generate the
multiple copies?

        I have a customer which has a problem similar to this one: 
        
http://www.arcknowledge.com/gmane.comp.sysutils.backup.veritasbu/2005-12
/msg00502.html
<http://www.arcknowledge.com/gmane.comp.sysutils.backup.veritasbu/2005-1
2/msg00502.html>  

        And would like to know your experience on ITC. 

        Thanks in advance, 

        Tarso 

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