Re: [Veritas-bu] Real World NBU Buffer settings Win2k3
2010-09-15 14:07:27
Hi David
Hmmm... Thanks.
This is very interesting. And also shoots my SLA's right out
of the planet into a Galaxy unknown to us!
Cannot understand how we can recover a system is 2 days, when
it takes double to backup completely!
Have also mixed with Multiplexing, and no
joy!
I dont think FlashBackups will help either, as its an array of
small - medium - large files.
Oh dear :-(
Si
Simon,
For
what it’s worth
64kb
buffer size
128
buffers
Multiplex
6
LTO4
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:
scenarion:
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.
Regards
Simon
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