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Re: NFS performance - more info

To: linux-xfs@xxxxxxxxxxx
Subject: Re: NFS performance - more info
From: Thomas Graichen <news-innominate.list.sgi.xfs@xxxxxxxxxxxxx>
Date: 4 Mar 2001 12:50:36 GMT
Distribution: local
Organization: innominate AG, Berlin, Germany
References: <news2mail-97t0uh$5qj$1@mate.bln.innominate.de> <200103041103.LAA23941@groucho.maths.monash.edu.au> <97tctp$pm3$1@mate.bln.innominate.de>
Reply-to: Thomas Graichen <thomas.graichen@xxxxxxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
User-agent: tin/1.4.4-20000803 ("Vet for the Insane") (UNIX) (Linux/2.4.2-XFS (i686))
Thomas Graichen <thomas.graichen@xxxxxxxxxxxxxx> wrote:

>> Your bonnie setup (in the other email) is possibly a bit flawed in
>> that it writes only 128M files and the server has 128M of memory, so
>> in theory the server doesn't have to write to disk at all. Could you
>> maybe try it again with a file size that's more than twice the server
>> memory size? That's what bonnie++ tells you to do anyway, I don't
>> know about bonnie.
>> Are you using NFSv3 on the server/client? nfsstat will let you know.

> oh yes - you are right - i took 128 because the client had 64 - but
> you are right the server has 128 and that counts here ... it'S v3
> btw.

> one other idea: does the size of the files matter - so do you get
> different results for say 25, 250 and 2500mb (always first run to
> ignore caching)?

ok - again with 256mb

              -------Sequential Output-------- ---Sequential Input-- --Random--
              -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU  /sec %CPU
          256  5179 35.9  5276 16.5  3501 17.8  4724 30.8  5672 15.5  77.4  5.1

but i just noticed it was nfsv2 (the typical redhat no3 in the nfs script)

will try 3 tomorrow - have to go now

t

-- 
thomas.graichen@xxxxxxxxxxxxxx
                                                         innominate AG
                                                  the linux architects
tel: +49-30-308806-13   fax: -77             http://www.innominate.com

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