From owner-freebsd-current Wed Dec 30 16:35:15 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id QAA24169 for freebsd-current-outgoing; Wed, 30 Dec 1998 16:35:15 -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 QAA24161 for ; Wed, 30 Dec 1998 16:35:13 -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 TAA28981; Wed, 30 Dec 1998 19:34:36 -0500 (EST) (envelope-from gjp@gjp.erols.com) X-Mailer: exmh version 2.0.1 12/23/97 To: "Steven P. Donegan" cc: 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 15:41:24 PST." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 30 Dec 1998 19:34:36 -0500 Message-ID: <28977.915064476@gjp.erols.com> Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG "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. You have to have either single-master or multi-master distribution. To my knowledge, no shipping product today (save perhaps one from M$, I can't remember offhand) supports multi-master replication. Which means that all writes to *any* LDAP replica in the network get a `pointer' back to the `master' LDAP server (sort of like a HTTP redirect) which is where the write is comitted, then replicated out to the other servers. > If you are going to use this for a password database (I think that was > your use) then why do you think writes will be so significant? (just > curious). There are sometimes requirements in ISPs to support rapid updates of large numbers of users in a short period of time. So commit time, and also distribution time, become critical. > Our use is for username/location,phone number,email address lookups - > which I beleive is probably the most frequent use of LDAP in a commercial > environment. That environment is extremely stable - very little change > occurs. I agree. MIS shops should love LDAP. I think there should be an alternative for ISPs, which is more tailored for their needs. 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