Date: Wed, 23 Aug 1995 11:01:42 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> To: cmsedore@mailbox.syr.edu (Christopher Sedore) Cc: hasty@rah.star-gate.com, freebsd-hackers@freebsd.org Subject: Re: Making a FreeBSD NFS server Message-ID: <199508231801.LAA09795@gndrsh.aac.dev.com> In-Reply-To: <Pine.SUN.3.91.950823091036.2184B-100000@rodan.syr.edu> from "Christopher Sedore" at Aug 23, 95 10:49:07 am
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> > > > The Network Computing article test were done over FDDI. I got ~3MB/sec > write and ~2MB/sec read while doing the tests. > > Note that the ~2MB/sec read was from a disk which only yielded ~2MB/sec > when using IOZone locally, so a 7200 rpm drive may make the number go up. Even a reasonable 5400RPM drive will do 4MB/s, and I have seen some in the 5.7MB/s class. > As I understand some of the NFS protocol issues, you probably won't see > more than ~2MB/sec read from a single process anyway, so you'd have to use > multiple IOZones or whatever other benchmark you use to break that barrier. I have seen in excess of 3.5MB/s over 100baseTX using a single copy of iozone to a single disk. ... > On Tue, 22 Aug 1995, Amancio Hasty Jr. wrote: > > > >>> Brian Tao said: > > > On Sun, 20 Aug 1995, Amancio Hasty Jr. wrote: > > > > > > > > Curious then, where is the time being spend in the NFS code? > > > > > > > > Given that we can drive the ethernet at near capacity and that the > > > > disks are very fast . It pretty much leads me to believe that > > > > the NFS code or protocol is the bottle neck. > > > > > > Are you talking about the case of synchronous writes to a FreeBSD > > > NFS server? I don't expect the bandwidth in the other cases to climb > > > any higher (already in the 800K/sec to 900K/sec range over 10Mbps > > > Ethernet). > > > > > > Should be interesting to find out the NFS performance numbers with > > your configuration using fast ethernet. Mine are in the 2 to 3.5MB/s range using 4MB/s disk drives and 100BaseTx. I suspect this would go up if I was using 6 or 7MB/s drives. Also routing performance on 100BaseTx is not what I had though it was, it is much better and I have measured 5 to 6MB/s using ttcp through a 100Mhz async cache Pentium, suspect it would be much better with sync burst cache as the machine was quite memory bandwidth bound when running the tests. > > If they are very high, I suggest sending the performance figures to > > Networking Computing 8) :-). > > Amancio -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Reliable computers for FreeBSD
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