Date: Mon, 09 Jun 2003 17:16:35 -0500 From: Eric Anderson <anderson@centtech.com> To: freebsd-performance@freebsd.org Subject: Re: Slow disk write speeds over network Message-ID: <3EE50743.1090704@centtech.com> References: <3EE4E156.6030603@centtech.com> <3EE4FAAF.7060302@mac.com>
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Chuck Swiger wrote: > Eric Anderson 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.. >> >> However, ftping a file or cp'ing over NFS shows speeds less than 1MB/s >> - which is not what I would expect - it's got gigabit ethernet, and >> has very fast read times (via ftp or nfs) over the network. > > > If the slowdown was only with regard to NFS, I'd ask you about what your > NFS clients looked like. However, if you're seeing a slowdown for FTP > and other network protocols, it's more likely to be a physical problem > with cabling, a NIC getting flaky, or something along those lines. I see it in both NFS and ftp transfers, but like I said in one of my other notes, I have 4 network cards in this machine, all act the same way. > Do you have this connected to a managed switch so that you can take a > look at the interface statistics for problems? Maybe try cranking the > NIC down from gigabit to 100Mbs ethernet speed and see whether that > makes a difference? Yes - and I just tried that suggestion - same thing. No help. Interfaces look ok. Eric -- ------------------------------------------------------------------ Eric Anderson Systems Administrator Centaur Technology Attitudes are contagious, is yours worth catching? ------------------------------------------------------------------
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