On Tuesday 04 June 2002 14:23, Trond Myklebust wrote:
> >>>>> " " == Matthias Welk <welk@fokus.gmd.de> writes:
> > Hi, since 2.5.4 I noticed a big slowdown in nfs. It seems that
> > this is related to the changes in the nfs-lookup code, because
> > now most traffic via nfs is for lookup- and getattr-calls as
> > you can see in the attached tcpdump log. I'v also attached a
> > log of nfsstat, which shows this problem too.
>
> Tough... Those extra checks are needed in order to ensure data cache
> correctness on file open().
>
> If you think you don't need them because the files that you are
> reading are known never to change on the server, you can try mounting
> with the 'nocto' mount option.
>
I tried again with the 'nocto' mount option, although I can't be sure that the
files will not change on the server, but the behaviour didn't change :-(
To get more info about this problem I compared the compile time and the nfs
traffic between 2.4.18-4 and 2.5.20 on a RedHat 7.3 system.
The sources (mosfet-liquid0.9.5.tar.gz - KDE style) were located on the local
disc and the libraries were linked over nfs.
The results attached to this mail show the big difference !
I hope you can do anything with it.
Greetings, Matthias.
--
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From: Matthias Welk office: +49-30-3463-7272
FHG Fokus mobile: +49-179- 1144752
Kaiserin-Augusta-Allee 31 fax : +49-30-3463-8672
10589 Berlin email : welk@fokus.fhg.de
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