From owner-freebsd-current Wed Dec 30 16:40:32 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id QAA24846 for freebsd-current-outgoing; Wed, 30 Dec 1998 16:40:32 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from gjp.erols.com (alex-va-n008c079.moon.jic.com [206.156.18.89]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id QAA24828 for ; Wed, 30 Dec 1998 16:40:27 -0800 (PST) (envelope-from gjp@gjp.erols.com) Received: from gjp.erols.com (localhost.erols.com [127.0.0.1]) by gjp.erols.com (8.9.1/8.8.7) with ESMTP id TAA29077; Wed, 30 Dec 1998 19:39:56 -0500 (EST) (envelope-from gjp@gjp.erols.com) X-Mailer: exmh version 2.0.1 12/23/97 cc: "Steven P. Donegan" , Christian Kuhtz , Mike Smith , Josh Tiefenbach , The Hermit Hacker , freebsd-current@FreeBSD.ORG From: "Gary Palmer" Subject: Re: NOW/MOSIX/Beowulf In-reply-to: Your message of "Wed, 30 Dec 1998 19:34:36 EST." <28977.915064476@gjp.erols.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 30 Dec 1998 19:39:56 -0500 Message-ID: <29073.915064796@gjp.erols.com> Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG "Gary Palmer" wrote in message ID <28977.915064476@gjp.erols.com>: > "Steven P. Donegan" wrote in message ID > : > > The farm of FreeBSD front ends would talk to an NFS backend (like a > > Network Appliance) so 'where' you commit your writes would be a moot point. > > Sharing LDAP caches like that doesn't work. Whoops. Guess I should say a bit more about *why* shouldn't I? If you think about it, each LDAP `replica' (even if they share the same DBM backend over NFS, and you could find an LDAP server which supported read-only operation like that), you still could run into troubles. Since each replica has in-core state about the file, have differet replicas write different updates to different parts of the file could lead to some interesting results ... even with good file/record locking, I think that is a path full of risk. Gary -- Gary Palmer FreeBSD Core Team Member FreeBSD: Turning PC's into workstations. See http://www.FreeBSD.ORG/ for info To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message