From owner-freebsd-isp Sat Oct 26 10:30:05 1996 Return-Path: owner-isp Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id KAA12413 for isp-outgoing; Sat, 26 Oct 1996 10:30:05 -0700 (PDT) Received: from solar.os.com (root@solar.os.com [199.232.136.65]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id KAA12406 for ; Sat, 26 Oct 1996 10:30:03 -0700 (PDT) Received: from jupiter.os.com (jupiter.os.com [199.232.136.162]) by solar.os.com (8.7/8.7.0) with SMTP id NAA12943; Sat, 26 Oct 1996 13:32:19 -0400 Message-Id: <1.5.4.32.19961026172758.006efe7c@solar> X-Sender: craigs@solar (Unverified) X-Mailer: Windows Eudora Light Version 1.5.4 (32) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Sat, 26 Oct 1996 13:27:58 -0400 To: Joe Greco From: Craig Shrimpton Subject: Re: Anyone using ccd (FreeBSD disk striper) for news Cc: freebsd-isp@FreeBSD.org Sender: owner-isp@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk 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/