From: =?iso-8859-1?Q?Brasseur_Val=E9ry?= <Valery.Brasseur@atosorigin.com>
Subject: RE: nfs unlink perf !
Date: Tue, 13 Aug 2002 17:09:14 +0200
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To: "'Lever, Charles'" <Charles.Lever@netapp.com>,
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I check nfsstat, and see a bunch of retrans...
but now when then following your suggestion I 've try to put :
   tcp + rsize/wsize=3D32768 and :
 * take the same time
 * hang on D state under moderate load so I need to reboot very =
frequently.

my previous setup was :
 * nfs v3, rsize/wsize=3D8192, udp

my client (DL360) and server  (F880) are connected through a dedicated
switch each with 100FD network link to the switch.

any ideas ?

> -----Original Message-----
> From: Lever, Charles [mailto:Charles.Lever@netapp.com]
> Sent: Monday, August 12, 2002 5:48 PM
> To: 'Brasseur Val=E9ry'; nfs@lists.sourceforge.net
> Subject: RE: [NFS] nfs unlink perf !
>=20
>=20
> link RPCs can be very large (much larger than wsize, for instance).
> if you use UDP and your network drops lots of packets, large link
> requests will probably require several retransmissions to complete.
>=20
> enlarge your transport socket buffer size on the client (see FAQ)
> and/or try NFS over TCP.  also examine your network to see if it
> is clean, and is working optimally.  if your client is attached
> via a more slow link than your server, that can be the source of
> bursty packet loss.
>=20
> > -----Original Message-----
> > From: Brasseur Val=E9ry [mailto:Valery.Brasseur@atosorigin.com]
> > Sent: Monday, August 12, 2002 8:09 AM
> > To: nfs@lists.sourceforge.net
> > Subject: [NFS] nfs unlink perf !
> >=20
> >=20
> > I am testing an application which to a lot of link/unlink
> >=20
> > server is a NetApp filer, client is linux 2.4.19+nfs patches.
> >=20
> > under load it seems that the unlink call is very long when=20
> > all over calls
> > response time seems to be OK.
> > is there any problems with the unlink code ?
> >=20
> > thanks
> >=20
> >=20
> >=20
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> >=20
>=20


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