Date: Wed, 2 Nov 2011 18:55:06 -0500 From: Gary Gatten <Ggatten@waddell.com> To: 'Vincent Hoffman' <vince@unsane.co.uk>, "FreeBSD-Questions@freebsd.org" <FreeBSD-Questions@freebsd.org> Subject: RE: nfs client speed lower than expected. Message-ID: <6727_1320278107_4EB1D85B_6727_448_1_D9B37353831173459FDAA836D3B43499CB3E6CF5@WADPMBXV0.waddell.com> In-Reply-To: <4EB1D792.8070103@unsane.co.uk> References: <4EB1D792.8070103@unsane.co.uk>
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Is the interface really at 1Gb? Have you tested with iperf, ftp, or anythi=
ng other than nfs?
-----Original Message-----
From: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd-questions@f=
reebsd.org] On Behalf Of Vincent Hoffman
Sent: Wednesday, November 02, 2011 6:52 PM
To: FreeBSD-Questions@freebsd.org
Subject: nfs client speed lower than expected.
Hi all,
What kind of speed should I be expecting over an NFS mount from
a linux box using a gig interface (igb)? I'm seeing linux clients
getting approx 2 or 3 times the throughput rsyncing files from a linux
nfs server that i get from a 8-stable FreeBSD client.
representative results
7.26MB/s - Freebsd client
21.10MB/s liunx client
I've tried a variety of files to try and take caching out of the
equation, I've tweaked a few sysctls after much googling
kern.ipc.maxsockbuf=3D4000000
net.inet.tcp.sendbuf_max=3D16777216
net.inet.tcp.recvbuf_max=3D16777216
net.inet.tcp.sendbuf_inc=3D16384
net.inet.tcp.recvbuf_inc=3D524288
net.inet.udp.recvspace=3D65535
net.local.stream.recvspace=3D65535
net.local.stream.sendspace=3D65535
with no obvious improvement.
freebsd mount options
ro,noatime,noexec,nosuid,udp,nfsv3,rsize=3D1024,wsize=3D1024,bg,hard,intr,t=
imeout=3D4,retrans=3D4
linux mount options
_netdev,ro,noatime,nodev,noexec,nosuid,proto=3Dudp,vers=3D3,rsize=3D1k,wsiz=
e=3D1k,bg,hard,intr,timeo=3D4,retrans=3D4
I have seen that using the linux server as an nfs client to write to the
NFS server on the freebsd box gives similar performance to a linux
client pulling from the linux server so I'm guessing its something to do
with the freebsd nfs client?
Any suggestions/clues welcome.
Thanks,
Vince
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