Date: Fri, 18 May 2001 10:27:12 -0700 From: "Kevin Oberman" <oberman@es.net> To: Douglas Egan <degan@calcon.net> Cc: "Jon O." <jono@microshaft.org>, freebsd-questions@FreeBSD.ORG Subject: Re: FreeBSD benchmark question Message-ID: <200105181727.f4IHRCc02845@ptavv.es.net> In-Reply-To: Your message of "Thu, 17 May 2001 16:27:50 CDT." <3B044256.8709AEE4@calcon.net>
next in thread | previous in thread | raw e-mail | index | archive | help
> Date: Thu, 17 May 2001 16:27:50 -0500 > From: Douglas Egan <degan@calcon.net> > Sender: owner-freebsd-questions@FreeBSD.ORG > > Make sure the filesystems on both machines are mounted the same way. > Linux defaults to async, whereas BSD default is metadata sync, data async > > Not sure if this would affect performance on your specific test, but you > should at least compare apples to apples. Mount both as either sync or async > explicitly before running the test. Another significant issue if you are using IDE disk is write cache. It is currently turned off by default to prevent possible data loss. You might want to test with it on (or turn it off in Linux, if you can). "man ata" for details. R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200105181727.f4IHRCc02845>