Date: Wed, 29 Jan 2014 18:08:31 -0500 (EST) From: Rick Macklem <rmacklem@uoguelph.ca> To: J David <j.david.lists@gmail.com> Cc: freebsd-net@freebsd.org, Garrett Wollman <wollman@freebsd.org> Subject: Re: Terrible NFS performance under 9.2-RELEASE? Message-ID: <2032299860.18637455.1391036911579.JavaMail.root@uoguelph.ca> In-Reply-To: <CABXB=RQj2evY7=Q0_7vbHrQrH3fPkW774gjNxWLwWbRXMzjdDA@mail.gmail.com>
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J David wrote: > On Tue, Jan 28, 2014 at 7:32 PM, Rick Macklem <rmacklem@uoguelph.ca> > wrote: > > Hopefully Garrett and/or you will be able to do some testing of it > > and report back w.r.t. performance gains, etc. > > OK, it has seen light testing. > > As predicted the vtnet drops are eliminated and CPU load is reduced. > > The performance is also improved: > > Test Before After > SeqWr 1506 7461 > SeqRd 566 192015 > RndRd 602 218730 > RndWr 44 13972 > > All numbers in kiB/sec. > Oops, ignore most of what I said about FHA. I now see that the default is 8 nfsd per FH, which should handle readaheads. However, it does remind me that it would be nice to try cranking up the readahead value for the client mount. "-o readahead=8" would be a good one to try (you can go as high as 16, if you'd like). Have fun with it, rick > There were initially still some problems with lousy hostcache values > on the client after the test, which is what causes the iperf > performance to tank after the NFS test, but after a reboot of both > sides and fresh retest, I haven't reproduced that again. If it comes > back, I'll try to figure out what's going on. > > But this definitely looks like a move in the right direction. > > Thanks! > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to > "freebsd-net-unsubscribe@freebsd.org" >
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