From owner-freebsd-questions Wed Jul 30 12:07:12 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id MAA25633 for questions-outgoing; Wed, 30 Jul 1997 12:07:12 -0700 (PDT) Received: from gdi.uoregon.edu (cisco-ts6-line2.uoregon.edu [128.223.150.32]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id MAA25625 for ; Wed, 30 Jul 1997 12:07:06 -0700 (PDT) Received: from localhost (dwhite@localhost) by gdi.uoregon.edu (8.8.5/8.8.5) with SMTP id MAA09772; Wed, 30 Jul 1997 12:06:40 -0700 (PDT) Date: Wed, 30 Jul 1997 12:06:40 -0700 (PDT) From: Doug White X-Sender: dwhite@localhost Reply-To: Doug White To: Steve Lalonde cc: questions@FreeBSD.ORG Subject: Re: ccd interleave for news spool In-Reply-To: <199707300756.IAA14532@entity.enta.net> 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, 30 Jul 1997, Steve Lalonde wrote: > the man page for ccd says news spool should be a large interleave BUT im > being told to use as small as i can by > another news admin. > > current settings are > name interleave flags devices > ccd1 2048 none /dev/sd2e /dev/sd3e > > so whats the best interleave? The ccd(4) man page suggests using as big a interleave as you can: For random-access oriented workloads, such as news servers, a larger in- terleave factor (e.g., 65,536) is more desirable. Note that there isn't much ccd can do to speed up applications that are seek-time limited. Larger interleave factors will at least reduce the chance of having to seek two disk-heads to read one directory or a file. This has been tested in practice by a couple of FreeBSD developers. The name doesn't come to me at the moment, but if you poke through the -hackers list archives at http://www.freebsd.org you can find more info. If you haven't read ccd(4) yet I highly suggest it. It has lots of good information for using ccd. Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major Spam routed to /dev/null by Procmail | Death to Cyberpromo