Date: Sat, 26 Oct 1996 13:27:58 -0400 From: Craig Shrimpton <craigs@os.com> To: Joe Greco <jgreco@brasil.moneng.mei.com> Cc: freebsd-isp@FreeBSD.org Subject: Re: Anyone using ccd (FreeBSD disk striper) for news Message-ID: <1.5.4.32.19961026172758.006efe7c@solar>
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At 04:50 PM 8/22/96 -0500, you wrote: >> On Thu, 22 Aug 1996, Craig Shrimpton wrote: > >Use a large stripe size. I use 1 cylinder group. You are not striping for >bandwidth. You are striping for CONCURRENCY. You _want_ one mechanism to >be able to handle an _entire_ file access on its own. > I have just implemented ccd and it seems to be working fine. I do have a question about the stripe size. This is what I have in /etc/ccd.conf: ccd0 65536 none /dev/sd0h /dev/sd1h I'm wondering if this is the correct stripe size for news. I think that's 1 cylinder group. Also, can the ccd driver use the automounter? I have ccdconfig -C in /etc/rc but I'm mounting the ccd0c drive manually. I'm wondering if a reboot will properly flush that disk. Any ideas on the proper way to start and stop these things? One last theory question. If I have 65536 as the stripe size and I write a 1K file to the ccd disk does it reside on one disk or both? Everyone suggests a full cylinder group for news but it seems like a huge value for an interleave. Thanks, Craig =================================================================== Orbit Systems Email: craigs@os.com 400 Grove Street Phone: (508) 753-8776 Worcester, MA 01605 http://www.os.com/
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