Date: Wed, 20 Oct 2004 17:29:35 -0400 (EDT) From: Charles Sprickman <spork@inch.com> To: Kristofer Pettijohn <krishopper@cybernetik.net> Cc: freebsd-isp@freebsd.org Subject: Re: Disk I/O Performance with CCD Message-ID: <20041020172819.A2588@shell.inch.com> In-Reply-To: <20041019192252.GB78974@cybernetik.net> References: <20041019192252.GB78974@cybernetik.net>
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On Tue, 19 Oct 2004, Kristofer Pettijohn wrote: > I've used tunefs to set the average file size to 20 MB and enabled > soft-updates, as these are generally larger binary files that just > get appended to, and then seeked later on to send the article out, > I've played with setting the stripe size from anywhere between 8MB > and 64MB, and did not see much change on performance between those. It's been awhile since I played with ccd and news, but isn't there a stripe size setting when you configure ccd? Fiddling with that might be interesting. If the stripe is small and your files are big, I imagine performance would suffer. Charles > Maybe I'm just missing something small, but on these SCSI drives > which have 160 MB/s transfer rates, I'm expecting a bit more than > I'm getting with CCD. > > Can someone give me any pointers to look at or suggestions of things > to try? > > Thanks! > > Kristofer > _______________________________________________ > freebsd-isp@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-isp > To unsubscribe, send any mail to "freebsd-isp-unsubscribe@freebsd.org" >
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