We do run with multiplex on for our duplicates. A year or two ago we
were trying to de-mux our dupes, but gave up on that in short order.

The original question/answer that suggested changing the NET_BUFFER_SZ
also indicated the drives were connected to the same machine. Well,
that's how -I- read it anyway.   

"David A. Chapa" wrote:
> 
> I don't know how NET_BUFFER_SZ would help your bpduplicate process, since
> this is on the same machine.
> 
> I don't even know if SIZE_DATA_BUFFERS or NUMBER_DATA_BUFFERS would help on
> the same machine...
> 
> Is it a requirement that you 'demultiplex' the images?  If not how long does
> it take to do a duplication that maintains the MPX?
> 
> I'd actually run that as a test...to see how long that takes.  If it is
> still long, then it wouldn't be the duplication process, but perhaps
> something else.
> 
> David
> 
> <><><><><><><><><><><><><><><><><><><><>
> David A. Chapa
> NetBackup Consultant
> DataStaff, Inc.
> http://www.consulting.datastaff.com
> 847 413 1144
> ---------------------------------------
> NBU-LSERV AT datastaff DOT com - Adv. Scripting
> http://www.xbpadm-commands.com
> 
> -----Original Message-----
> From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Brian Horn
> Sent: Thursday, January 10, 2002 11:56 AM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] bpduplicate taking XX hours, too long
> 
> Someone recently posted that their duplication process was taking much
> longer than they would have expected. We are finding that the case on
> -some- of our duplications here as well. When they crawl they really
> CRAWL.  Originals and duplicates both allow for multiplexing. Media and
> master server same machine. HP-UX 10.20 , DataCenter 3.4. Input tapes
> usually on a STK 9730, output tapes usually on Adic Fastor 7
> One response was to change the NET_BUFFER_SZ to 262144 .  What are the
> odds that this could help us here?
> --
> The wisest mind has something yet to learn.
> George Santayana
> ----------------------------------------------------------
> Aristotle maintained that women have fewer teeth than men; although he
> was twice married, it never occurred to him to verify this statement by
> examining his wives' mouths.
> Bertrand Russell -- The Impact of Science on Society, 1952.
> _______________________________________________
> Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
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-- 
The wisest mind has something yet to learn.
George Santayana
----------------------------------------------------------
Aristotle maintained that women have fewer teeth than men; although he
was twice married, it never occurred to him to verify this statement by
examining his wives' mouths.
Bertrand Russell -- The Impact of Science on Society, 1952.