Hi,

I'm using bpduplicate to create duplicate images on OFFSITE tapes.
But the dulication is really slow compared to the backup speed.
We use 9840 FCAL tape drives and the max speed is 1 MB/s ( using 2 tape
drives on the same master server 3.2).
the SIZE_DATA_BUFFERS is set to 262144 which is the recommended buffers size
for this kinf of tape drive.

Does anyone has an idea ?

Thanks,
Frederick

----- Original Message -----
From: "David A. Chapa" <david AT xbpadm-commands DOT com>
To: <veritas-bu AT mailman.eng.auburn DOT edu>
Sent: Tuesday, April 10, 2001 3:25 PM
Subject: RE: [veritas-bu] Data Buffer sizes and restores


> Terry:
>
> I wrote a rather extensive response to one of the other list members about
> buffers, how and when to use them.
>
> I've attached it here.  As far as it inhibiting your ability to restore
the
> data that was backed up, that is in regards to the SIZE of the data
buffers
> and not the NUMBER.  You don't want your data buffers to exceed the SIZE
of
> your hardware manufacturer's spec.
>
> I hope this helps to answer your questions.
>
> <><><><><><><><><><><><><><><><><><><><>
> David A. Chapa
> Consulting Manager
> DataStaff, Inc.
> 847 413 1144
> http://www.consulting.datastaff.com
> ---------------------------------------
> NBU-LSERV AT datastaff DOT com - Adv. Scripting
>
> -----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 Spicuzza,
> Terry G
> Sent: Tuesday, April 10, 2001 10:54 AM
> To: 'veritas-bu AT mailman.eng.auburn DOT edu'
> Subject: [veritas-bu] Data Buffer sizes and restores
>
>
> Our environment is running 3.2 with the default buffers for netbackup, but
> we want to bump this up to 16 data buffers with 64k blocks.  I heard
> somewhere, if you alter the buffers and do backups, there may be a problem
> with doing restores.  Has anyone altered the buffers and had any problems
> with doing restores?
>
> ***********
> Terry G Spicuzza
> Collective Technologies
> Eaton Corp. (TCC)
> 34899 Curtis Blvd.
> Eastlake, Ohio 44095-4002
> voice: (440) 954-5626 fax:  (440) 954-5636
> pager: 800-946-4646 pin#1438201
> alphanumeric: 1438201 AT mobilecomm DOT net
> email: spicuzza AT colltech DOT com
>
> To check Netbackup status please go to http://netbackup.tcc.etn.com
>
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