Date: Mon, 09 Jun 2003 14:49:31 -0500 From: Eric Anderson <anderson@centtech.com> To: Sean Chittenden <sean@chittenden.org> Cc: freebsd-performance@freebsd.org Subject: Re: Slow disk write speeds over network Message-ID: <3EE4E4CB.4060108@centtech.com> References: <3EE4E156.6030603@centtech.com> <20030609194705.GJ65470@perrin.int.nxad.com>
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Sean Chittenden wrote: >>Ok, I have a file server (NFS) running FreeBSD 4.8-RC1, which is having >>incredibly slow disk write speeds. Locally, doing something like: >>dd if=/dev/zero of=/partition/testfile >>Shows 14MB/s - which is what I expect.. > > > Check your cabling... you may have a bad pair in your cable on your > send wires, or at least a crummy pair with high resistance. See if > netstat -i has any errors listed. A change in performance that > dramatic and only in one direction is disturbing and doesn't sound > like a kernel or software issue, though I could be quite wrong. Well, I don't believe that it is a problem - I have 4 gigabit network cards in the machine (connected to 4 different networks), and all act this same way - all use different types of cables too. I've also tried several different client machines. Eric -- ------------------------------------------------------------------ Eric Anderson Systems Administrator Centaur Technology Attitudes are contagious, is yours worth catching? ------------------------------------------------------------------
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