From owner-freebsd-hackers Sat Mar 8 22:55:26 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id WAA02141 for hackers-outgoing; Sat, 8 Mar 1997 22:55:26 -0800 (PST) Received: from alpha.risc.org (taob@trt-on8-10.netcom.ca [207.181.82.202]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id WAA02127; Sat, 8 Mar 1997 22:55:18 -0800 (PST) Received: from localhost (taob@localhost) by alpha.risc.org (8.8.4/8.8.4) with SMTP id BAA22890; Sun, 9 Mar 1997 01:55:09 -0500 (EST) Date: Sun, 9 Mar 1997 01:55:08 -0500 (EST) From: Brian Tao To: "matthew c. mead" cc: isp@freebsd.org, hackers@freebsd.org Subject: Re: freebsd as a news server? In-Reply-To: <199703090439.XAA12069@goof.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk On Sat, 8 Mar 1997, matthew c. mead wrote: > > I've got the striping factor set to 255 blocks (per a suggestion in > the docs for ccd). For a news server, a stripe size of 65536 blocks (32 megabytes) will give you optimal results, due to the mechanics of UFS's file and directory layout in a cylinder group (which by default is 32MB). That ccd configuration will tend to localize all disk access related to reading a random file to a single drive in your array, thus allowing maximum concurrency across the RAID. This is why having many smaller disks is better than having a few larger disks. -- Brian Tao (BT300, taob@risc.org) "Though this be madness, yet there is method in't"