Date: Wed, 10 Jul 2013 11:57:44 +1200 From: Berend de Boer <berend@pobox.com> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: Terrible NFS4 performance: FreeBSD 9.1 + ZFS + AWS EC2 Message-ID: <87k3kzxp53.wl%berend@pobox.com> In-Reply-To: <818900293.3878290.1373413081112.JavaMail.root@uoguelph.ca> References: <877gh0yvhm.wl%berend@pobox.com> <818900293.3878290.1373413081112.JavaMail.root@uoguelph.ca>
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>>>>> "Rick" == Rick Macklem <rmacklem@uoguelph.ca> writes:
Rick> Hmm, this is interesting. ken@'s file handle affinity patch
Rick> works for NFSv3, but not NFSv4. If I understood his posts
Rick> correctly, the fh affinity patch was needed, so ZFS's
Rick> heuristic for recognizing sequential reading would function
Rick> correctly. (A file handle affinity patch for NFSv4 will take
Rick> some time, since all RPCs in NFSv4 are compounds, with
Rick> reads/writes imbedded in them, along with other ops.)
These are all very small files, not much large, so it's not some kind
of sequential reading/writing test. Just thousands of small files
being written, and a fair amount of reads.
Rick> Also, I can't remember if you've bumped up the # of nfsd
Rick> threads, but I'd go for 256. nfs_server_flags="-u -t -n
Rick> 256" - in your /etc/rc.conf
Didn't. But only one client was writing, so I figured that shouldn't matter.
--
All the best,
Berend de Boer
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