Re: [Veritas-bu] Real World NBU Buffer settings Win2k3

2010-09-15 14:05:05
Subject: Re: [Veritas-bu] Real World NBU Buffer settings Win2k3
From: "Spearman, David" <spe08 AT DOT us>
To: "'WEAVER, Simon (external)'" <simon.weaver AT astrium.eads DOT net>, "veritas-bu AT mailman.eng.auburn DOT edu" <veritas-bu AT mailman.eng.auburn DOT edu>
Date: Wed, 15 Sep 2010 14:04:56 -0400



For what it’s worth

64kb buffer size

128 buffers

Multiplex 6


10GB backbone/2Gb FC

I have played around with all sorts of buffer sizes but in our mixed environment 64 works best.


But 4 days for 1.7TB seems more like the norm to me. We have several servers verging on 1TB that can take 36 hours.


David Spearman

County of Henrico


From: veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of WEAVER, Simon (external)
Sent: 15 September, 2010 02:00 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Real World NBU Buffer settings Win2k3


Hi All
Anyone got any real world experience on buffer settings:

Win2k3 San Media, connected to 2GB Fabric attached 8 LTO4 Drives.
Due to drive availability, Multiplexing onto one drive.

Main problem: One volume (1,7tb in size) takes over 4 days to fully complete.
Got the Tuning Guide and Technote 244602, but I tried some settings, only to find the backup would not even mount tape correctly.

So back to "no" settings at the mo.

Volume are generic files/folders, mixture of large and small sizes. But 1.7TB's in my view should be done quicker. Also Data is compressed.



This email (including any attachments) may contain confidential
and/or privileged information or information otherwise protected
from disclosure. If you are not the intended recipient, please
notify the sender immediately, do not copy this message or any
attachments and do not use it for any purpose or disclose its
content to any person, but delete this message and any attachments
from your system. Astrium disclaims any and all liability if this
email transmission was virus corrupted, altered or falsified.
Astrium Limited, Registered in England and Wales No. 2449259
Registered Office:
Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2AS, England


Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu