Date: Thu, 25 Apr 2013 11:46:09 -0700 From: Marc Fournier <mfournier@sd63.bc.ca> To: Marc G. Fournier <scrappy@hub.org> Cc: freebsd-fs@freebsd.org Subject: Re: NFS Performance issue against NetApp Message-ID: <27856D25-CE4F-45C3-A18D-ACB0793D70B6@sd63.bc.ca> In-Reply-To: <2F5E9262-E465-4837-9B35-6220970C185E@hub.org> References: <972106612.1125159.1366850215231.JavaMail.root@erie.cs.uoguelph.ca> <2F5E9262-E465-4837-9B35-6220970C185E@hub.org>
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On 2013-04-25, at 11:43 , Marc G. Fournier <scrappy@hub.org> wrote: > > On 2013-04-24, at 17:36 , Rick Macklem <rmacklem@uoguelph.ca> wrote: > >> If you explicitly set rsize=N,wsize=N on a mount, those sizes will be >> used unless they are greater than min(MAXBSIZE, server-max). MAXBSIZE is >> the limit for the client side buffer cache and server-max is whatever >> the server says is its max, so the client never uses a value greater than >> that. > > Just got my new Intel card in, so starting to play with it … one thing I didn't notice yesterday when I ran nfsstat -m: > > nfsv3,tcp,resvport,soft,intr,cto,lockd,sec=sys,acdirmin=3,acdirmax=60,acregmin=5,acregmax=60,nametimeo=60,negnametimeo=60,rsize=65536,wsize=65536,readdirsize=32768,readahead=1,wcommitsize=5175966,timeout=120,retrans=2 > > Earlier in this thread, it was recommended to change to 32k … and Jeremy Chadwick thought it defaulted to 8k … > > My fstab entry right now is simply: > > 192.168.1.1:/vol/vm /vm nfs rw,intr,soft 0 0 > > so I'm not changing rsize/wsize anywhere … did those defaults get raised recently and nobody noticed? or does it make sense to reduce from 64k -> 32k to get better performance? > > Again, this is using a FreeBSD client to mount from a NetApp file server … Just checked on the Linux box (old, being phased out) and when I do an hfs mount, it too is set to 64k rsize/wsize: Flags: rw,relatime,vers=3,rsize=65536,wsize=65536,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=10.5.253.130,mountvers=3,mountproto=tcp
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