Do you back up other servers across your network during the time this
transfer is running? I know we use VERITAS Backup Exec to backup remote
servers across the LAN and it really ties up our bandwidth.

Chris Bipes
Director of Information Services
CrossCheck, Inc.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of James Rich
Sent: Thursday, August 13, 2009 5:46 PM
To: Midrange Systems Technical Discussion
Subject: Re: NFS performance

On Fri, 14 Aug 2009, Lukas Beeler wrote:

On Fri, Aug 14, 2009 at 01:06, James Rich<james@xxxxxxxxxxx> wrote:
Well, what kind of hardware were you running?

How many disks? What kind of RAID controller? Which CPU Feature?

12 disks. I'm not sure of the RAID or CPU feature. But can those
be the bottleneck? It took 12 1/2 hours to transfer 12GB of data. Even
single disk can perform better than that. This system wasn't doing
anything else all night.

Other issues could be a mismatched duplex setting - ensure that both
the switch and the ethernet line description are configured the same
(in most environments, *AUTO/*AUTO is the way to go).

I have *AUTO/*AUTO and it is currently at 100M and *FULL which matches
hardware capability.

James Rich

if you want to understand why that is, there are many good books on
the design of operating systems. please pass them along to redmond
when you're done reading them :)
- Paul Davis on ardour-dev

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