From owner-freebsd-questions Thu Nov 13 09:32:32 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id JAA29526 for questions-outgoing; Thu, 13 Nov 1997 09:32:32 -0800 (PST) (envelope-from owner-freebsd-questions) Received: from gdi.uoregon.edu (gdi.uoregon.edu [128.223.170.30]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id JAA29511 for ; Thu, 13 Nov 1997 09:32:28 -0800 (PST) (envelope-from dwhite@gdi.uoregon.edu) Received: from localhost (dwhite@localhost) by gdi.uoregon.edu (8.8.7/8.8.7) with SMTP id JAA02007; Thu, 13 Nov 1997 09:32:26 -0800 (PST) (envelope-from dwhite@gdi.uoregon.edu) Date: Thu, 13 Nov 1997 09:32:25 -0800 (PST) From: Doug White Reply-To: Doug White To: Chris Peltier cc: "'FreeBSD-questions@FreeBSD.org'" Subject: Re: CCD and Squid In-Reply-To: <97Nov12.181417est.6207@netgate.iectech.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Wed, 12 Nov 1997, Chris Peltier wrote: > I was wondering what CCD disk > strategy is best with Squid. Is it better to > just concatenate the drives or to stripe > across all drives. With Squids directory > cache structure can you take advantage > of reducing overall disk access time by > using multiple spindles concatenated? > I would think that disk transfer rate is > not as important in this application and > reducing access time by keeping logical > I/Os on a single spindle (instead of involving > them all) is. Actually, you want to spread the I/O's around. In SCSI systems that suport detach/atttach, you can send separate commands to separate devices and have them do the seek concurently. The speed limit is going to be your disk speed in any case, by striping them you can hope to get page accesses on separate disks. > Does anybody have any thoughts or experience > with this? You might check with teh squid people, I'm sure others have fought this on other platforms. > FreeBSD 2.2.2 is the OS. You should upgrade to 2.2.5, you will be much happier. Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major