From owner-freebsd-stable Fri May 15 14:56:42 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id OAA12027 for freebsd-stable-outgoing; Fri, 15 May 1998 14:56:42 -0700 (PDT) (envelope-from owner-freebsd-stable@FreeBSD.ORG) Received: from pluto.plutotech.com (mail.plutotech.com [206.168.67.137]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id OAA11913 for ; Fri, 15 May 1998 14:55:34 -0700 (PDT) (envelope-from gibbs@plutotech.com) Received: from narnia.plutotech.com (narnia.plutotech.com [206.168.67.130]) by pluto.plutotech.com (8.8.7/8.8.5) with ESMTP id PAA26379; Fri, 15 May 1998 15:55:35 -0600 (MDT) Message-Id: <199805152155.PAA26379@pluto.plutotech.com> X-Mailer: exmh version 2.0.1 12/23/97 To: Studded cc: "Justin T. Gibbs" , freebsd-stable@FreeBSD.ORG Subject: Re: 980513 CAM snapshot available. In-reply-to: Your message of "Fri, 15 May 1998 11:05:30 PDT." <355C83EA.9D74BD47@dal.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 15 May 1998 15:51:22 -0600 From: "Justin T. Gibbs" Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk >Justin T. Gibbs wrote: > >> The device statistics portion of the 2.2-stable snapshot has not been >> thoroughly tested yet, so I would appreciate feedback on iostat/systat/ >> vmstat functionality under 2.2. > > I am always eager to help test new stuff for -Stable, however I have >some questions if you don't mind. Sure. >1. How stable is the cam stuff? IOW, given that I don't really have >time in my life right now to re-install my stuff (yes, I have backups, >just no time :) should I be doing this? CAM has been running on wcarchive for some time now. The HotMail folks are currently doing their regression tests on CAM for deployment. Satoshi has been using it for a long time for his "art server" project at Cal. Pluto uses it for a video server... >From what I can tell, it is more robust than the old code. >2. What are some *specific* things that I can test before installing cam >and after which will show performance improvements, reliability, etc? CAM really shines for non-sequential I/O performance. For instance, if you fire off an iozone on your /usr partition, and then start launching some apps, they should launch significantly faster under CAM than the old code assuming your drives support tagged queuing. >3. I have an Adaptec 2940 UW, an IBM DCAS 34300 UW drive and a zip >drive. I'm running a very recent -Stable. Does this sound like a good >platform for the cam stuff? The patches should just drop in. >Congrats on your achievements thus far, Thanks! >Doug -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message