From owner-freebsd-hackers Tue Feb 3 18:35:36 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id SAA23768 for hackers-outgoing; Tue, 3 Feb 1998 18:35:36 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from Kitten.mcs.com (Kitten.mcs.com [192.160.127.90]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id SAA23757 for ; Tue, 3 Feb 1998 18:35:28 -0800 (PST) (envelope-from karl@Mars.mcs.net) Received: from Mars.mcs.net (karl@Mars.mcs.net [192.160.127.85]) by Kitten.mcs.com (8.8.7/8.8.2) with ESMTP id UAA28185; Tue, 3 Feb 1998 20:35:27 -0600 (CST) Received: (from karl@localhost) by Mars.mcs.net (8.8.7/8.8.2) id UAA03048; Tue, 3 Feb 1998 20:35:26 -0600 (CST) Message-ID: <19980203203526.20512@mcs.net> Date: Tue, 3 Feb 1998 20:35:26 -0600 From: Karl Denninger To: Julian Elischer Cc: hackers@FreeBSD.ORG Subject: Re: kirk's soft-update integration.. References: <34D7D0B0.500F9F30@whistle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.84 In-Reply-To: <34D7D0B0.500F9F30@whistle.com>; from Julian Elischer on Tue, Feb 03, 1998 at 06:21:37PM -0800 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG X-To-Unsubscribe: mail to majordomo@FreeBSD.org "unsubscribe hackers" How is this a "poison pill"? I don't see the problem - FreeBSD, which is what this would go into, is already available in source and object form at no cost or for the reasonable distribution cost (if you buy a CDROM). -- -- Karl Denninger (karl@MCS.Net)| MCSNet - Serving Chicagoland and Wisconsin http://www.mcs.net/ | T1's from $600 monthly to FULL DS-3 Service | NEW! K56Flex support on ALL modems Voice: [+1 312 803-MCS1 x219]| EXCLUSIVE NEW FEATURE ON ALL PERSONAL ACCOUNTS Fax: [+1 312 803-4929] | *SPAMBLOCK* Technology now included at no cost On Tue, Feb 03, 1998 at 06:21:37PM -0800, Julian Elischer wrote: > Kirk's soft update code has a poison pill license for > commercial use, (he gives the license on a case by case basis) but > it greatly speeds up FS access, and is freely usable for private > use. The patches, when added to FreeBSD actually do yield a slight > improvement even when used with the dummy stub module that can be > used to make the system still work for commercial uses. > The slight improvement is due to his replacement syncer. > > While the copyrighted file cannot be used in every situation, the > system as modified to use it seems to not have any bad side effects, > and as the file itself can be distributed freely with a source > available OS, there would be no problem with even distributing > the files to allow private users to make use of this. > > The effect is to make the speed of a filesystem approach that of > an async FS while maintaining the safety of a sync FS. > (It may even be faster than our async FS). > > What I want to get from the readership here, and more importantly, > CORE members, is whether the changes for this should be integrated > back into FreeBSD-current, and when. > > I'm not SURE yet whether I CAN put the changes back (OpenBSD did) > but I'd like some sort of a reading of the acceptance of it.. > > An indication of how useful this is is: > > multiple compiles, copies, rms etc. > > With soft updates: writes: 6 sync, 1,113,686 async; run time 19hr, 50min > Normal filesystem: writes: 1,459,147 sync, 487,031 async; run time 27hr, > 15min > > The upshot is 42% less I/O and 28% shorter running time. > ---------------------------- > > the license is: > > /* > * Copyright 1997 Marshall Kirk McKusick. All Rights Reserved. > * > * The soft updates code is derived from the appendix of a University > * of Michigan technical report (Gregory R. Ganger and Yale N. Patt, > * "Soft Updates: A Solution to the Metadata Update Problem in File > * Systems", CSE-TR-254-95, August 1995). > * > * The following are the copyrights and redistribution conditions that > * apply to this copy of the soft update software. For a license > * to use, redistribute or sell the soft update software under > * conditions other than those described here, please contact the > * author at one of the following addresses: > * > * Marshall Kirk McKusick mckusick@mckusick.com > * 1614 Oxford Street +1-510-843-9542 > * Berkeley, CA 94709-1608 > * USA > * > * Redistribution and use in source and binary forms, with or without > * modification, are permitted provided that the following conditions > * are met: > * > * 1. Redistributions of source code must retain the above copyright > * notice, this list of conditions and the following disclaimer. > * 2. Redistributions in binary form must reproduce the above copyright > * notice, this list of conditions and the following disclaimer in > the > * documentation and/or other materials provided with the > distribution. > * 3. None of the names of McKusick, Ganger, Patt, or the University of > * Michigan may be used to endorse or promote products derived from > * this software without specific prior written permission. > * 4. Redistributions in any form must be accompanied by information on > * how to obtain complete source code for any accompanying software > * that uses the this software. This source code must either be > included > * in the distribution or be available for no more than the cost of > * distribution plus a nominal fee, and must be freely > redistributable > * under reasonable conditions. For an executable file, complete > * source code means the source code for all modules it contains. > * It does not mean source code for modules or files that typically > * accompany the operating system on which the executable file runs, > * e.g., standard library modules or system header files. > * > * THIS SOFTWARE IS PROVIDED BY MARSHALL KIRK MCKUSICK ``AS IS'' AND ANY > * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE > IMPLIED > * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE > ARE > * DISCLAIMED. IN NO EVENT SHALL MARSHALL KIRK MCKUSICK BE LIABLE FOR > * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR > CONSEQUENTIAL > * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE > GOODS > * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) > * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, > STRICT > * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY > WAY > * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY > OF > * SUCH DAMAGE. > * > * @(#)ffs_softdep.c 9.12 (McKusick) 12/2/97 > */