From: Dan Stromberg Subject: Re: default nfs mount options from linux to linux Date: Thu, 21 Apr 2005 18:42:51 -0700 Message-ID: <1114134171.27207.194.camel@seki.nac.uci.edu> References: <1114131719.12180.8.camel@localhost> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-MSNSmD6L+yvWSyXQU1vB" Cc: strombrg@dcs.nac.uci.edu, nfs@lists.sourceforge.net Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.11] helo=sc8-sf-mx1.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1DOnC3-0001xK-E2 for nfs@lists.sourceforge.net; Thu, 21 Apr 2005 18:42:55 -0700 Received: from dcs.nac.uci.edu ([128.200.34.32] ident=root) by sc8-sf-mx1.sourceforge.net with esmtp (TLSv1:AES256-SHA:256) (Exim 4.41) id 1DOnC2-0008Us-Jd for nfs@lists.sourceforge.net; Thu, 21 Apr 2005 18:42:55 -0700 To: Bradford Arrington In-Reply-To: <1114131719.12180.8.camel@localhost> Sender: nfs-admin@lists.sourceforge.net Errors-To: nfs-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Post: List-Help: List-Subscribe: , List-Archive: --=-MSNSmD6L+yvWSyXQU1vB Content-Type: multipart/alternative; boundary="=-bF1TVrkWhXt18cAUW2fG" --=-bF1TVrkWhXt18cAUW2fG Content-Type: text/plain Content-Transfer-Encoding: quoted-printable If you want to empirically determine a good wsize, for example, you might try the script below. I still haven't had a chance to use it, but I'd like to think it'll work fine. :) Also, if you're on a gigabit network, you may be able to improve NFS performance a lot by turning on jumbo frames. #!/usr/local/bin/bash # with these options: # bg,hard,intr,rsize=3D8192,wsize=3D8192 # we got 50Mbps over NFS to ext3 from esmf04d to esmft2 # I suspect UDP may be faster; we're using tcp here. Not sure why AIX # isn't reporting that. #mount -o vers=3D3,proto=3Dtcp,rsize=3D8192,wsize=3D8192 esmft2:/foo /mnt/f= oo for proto in tcp udp do for vers in 3 2 do for size in $(seq 1024 16 65536) do echo echo $vers $proto $size cd / umount /mnt/foo mount -o insecure,vers=3D"$vers",proto=3D"$proto",rsize=3D $size,wsize=3D$size \ esmft2:/foo /mnt/foo cd /mnt/foo rm -f testfile # write 10 gigabytes echo writing 10 gigabytes: $proto $vers $size /bin/time dd if=3D/dev/zero of=3Dtestfile bs=3D1024k count=3D10240= 2>&1 done done done On Thu, 2005-04-21 at 18:01 -0700, Bradford Arrington wrote: > Does anyone know what or how to find the default mount option are when > mounting an nfs volume? > example > mount linuxnfs:/export /mnt=20 >=20 > How do I find the rsize/wsize and any other options? (that are default) >=20 > I am lead to believe that the nfs man page information is false for > r/wsize 1k (no way) (udp default is correct though). If I set the > r/wsize to 1k performance is very slow. In a "vanilla" default as above > it has the fastest iozone benchmarks. >=20 > Thanks, > -Brad >=20 >=20 >=20 > ------------------------------------------------------- > SF email is sponsored by - The IT Product Guide > Read honest & candid reviews on hundreds of IT Products from real users. > Discover which products truly live up to the hype. Start reading now. > http://ads.osdn.com/?ad_id=3D6595&alloc_id=3D14396&op=3Dclick > _______________________________________________ > NFS maillist - NFS@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/nfs --=-bF1TVrkWhXt18cAUW2fG Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
If you want to empirically determine a good wsize, for example, you might t= ry the script below.  I still haven't had a chance to use it, but I'd = like to think it'll work fine.  :)

Also, if you're on a gigabit network, you may be able to improve NFS perfor= mance a lot by turning on jumbo frames.

#!/usr/local/bin/bash
# with these options:
# bg,hard,intr,rsize=3D8192,wsize=3D8192
# we got 50Mbps over NFS to ext3 from esmf04d to esmft2
# I suspect UDP may be faster; we're using tcp here.  Not sure why AIX=
# isn't reporting that.

#mount -o vers=3D3,proto=3Dtcp,rsize=3D8192,wsize=3D8192 esmft2:/foo /mnt/f= oo
for proto in tcp udp
do
   for vers in 3 2
   do
      for size in $(seq 1024 16 65536)
      do
         echo
         echo $vers $proto $size          cd /
         umount /mnt/foo
         mount -o insecure,vers=3D&= quot;$vers",proto=3D"$proto",rsize=3D$size,wsize=3D$size \             esmft2:/= foo /mnt/foo
         cd /mnt/foo
         rm -f testfile
         # write 10 gigabytes
         echo writing 10 gigabytes:= $proto $vers $size
         /bin/time dd if=3D/dev/zer= o of=3Dtestfile bs=3D1024k count=3D10240 2>&1
      done
   done
done


On Thu, 2005-04-21 at 18:01 -0700, Bradford Arrington wrote: 
Does anyone know what or how to find the default mo=
unt option are when
mounting an nfs volume?
example
mount linuxnfs:/export /mnt 

How do I find the rsize/wsize and any other options=
? (that are default)

I am lead to believe that the nfs man page informat=
ion is false for
r/wsize 1k (no way) (udp default is correct though)=
. If I set the
r/wsize to 1k performance is very slow. In a "=
vanilla" default as above
it has the fastest iozone benchmarks.

Thanks,
-Brad



---------------------------------------------------=
----
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT =
Products from real users.
Discover which products truly live up to the hype. =
Start reading now.
http://ads.osdn.com/?ad_id=3D6595&alloc_id=3D143=
96&op=3Dclick
_______________________________________________
NFS maillist  -  NFS@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nfs
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