Date: Wed, 26 Nov 2008 19:29:21 +0100 From: "Claus Guttesen" <kometen@gmail.com> To: "Lin Jui-Nan Eric" <ericlin@tamama.org> Cc: stable@freebsd.org Subject: Re: NFS Performance Issue Message-ID: <b41c75520811261029l14d0d8cbk891b4abdf12fb8ae@mail.gmail.com> In-Reply-To: <47713ee10811260821taf548aapceb210a3bc7314ea@mail.gmail.com> References: <47713ee10811260821taf548aapceb210a3bc7314ea@mail.gmail.com>
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> We recently found that the Performance of the NFS Client in FreeBSD is
> worse than that in Linux.
What OS is your nfs-server running?
> It's about 1/3 of NFS client in Linux. We have tuned TCP recv/send
> buffer, and got no gain. The mount parameters are: (We use amd)
> rw,nfsv3,lockd,grpid,intr,soft,cache,nodev,resvport,timeo=10,retrans=3,async,rsize=1024,wsize=1024,noatime
>
> Does anyone has any suggestion to get the performance better? Thank you all!
You can ommit read- and write-size using tcp-mounts. From 'man mount_nfs':
-w Set the write data size to the specified value. Ditto the com-
ments w.r.t. the -r option, but using the ``fragments dropped due
to timeout'' value on the server instead of the client. Note
that both the -r and -w options should only be used as a last
ditch effort at improving performance when mounting servers that
do not support TCP mounts.
I have a solaris 9 nfs-server with vxfs and I used to mount using udp
but then I ran into 'server not responding' and changed to
tcp-nfs-mount instead. I just copied a 200 MB file to the nfs-server
in 7.5 sec. which is 26.6 MB/s.
--
regards
Claus
When lenity and cruelty play for a kingdom,
the gentler gamester is the soonest winner.
Shakespeare
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