From owner-freebsd-hackers Mon Aug 23 12:28:59 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from mail1.its.rpi.edu (mail1.its.rpi.edu [128.113.100.7]) by hub.freebsd.org (Postfix) with ESMTP id A047E14C49; Mon, 23 Aug 1999 12:28:46 -0700 (PDT) (envelope-from drosih@rpi.edu) Received: from [128.113.24.47] (gilead.acs.rpi.edu [128.113.24.47]) by mail1.its.rpi.edu (8.9.3/8.9.3) with ESMTP id PAA20796; Mon, 23 Aug 1999 15:27:33 -0400 Mime-Version: 1.0 X-Sender: drosih@mail.rpi.edu Message-Id: In-Reply-To: <19990823152849.H83273@freebie.lemis.com> References: <19990823122719.G83273@freebie.lemis.com> <7071.935386172@critter.freebsd.dk> <19990823095310.A83273@freebie.lemis.com> <199908230031.RAA00909@apollo.backplane.com> <19990823100654.B83273@freebie.lemis.com> <199908230504.WAA01860@apollo.backplane.com> <19990823152849.H83273@freebie.lemis.com> Date: Mon, 23 Aug 1999 15:28:01 -0400 To: Greg Lehey , Matthew Dillon , Poul-Henning Kamp From: Garance A Drosihn Subject: Re: Mandatory locking? Cc: FreeBSD Hackers , FreeBSD Committers , Garrett Wollman Content-Type: text/plain; charset="us-ascii" ; format="flowed" Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG At 3:28 PM +0930 8/23/99, Greg Lehey wrote: >I'm a little surprised that there's any objection to the concept >of mandatory locking. In transaction processing, locking is not >optional, and if any process at all can access a file or set of... For what it's worth, I also like the idea of mandatory locking. It's important to think through some of the implementation details, but I would also like to see some way to specify mandatory locking in at least some situations. I'm not particularly thrilled with the idea of keying it off chmod bits, though. That seems like a recipe for disaster. Anyway, I am also puzzled as to why there would be much objection to the option of mandatory locking. My initial systems-programming experience was on a mainframe OS where mandatory locking was the NORM, and you had to go out of your way to avoid locking. It seemed to work quite well in my experience. --- Garance Alistair Drosehn = gad@eclipse.acs.rpi.edu Senior Systems Programmer or drosih@rpi.edu Rensselaer Polytechnic Institute To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message