Date: Wed, 30 Dec 1998 19:34:36 -0500 From: "Gary Palmer" <gpalmer@FreeBSD.ORG> To: "Steven P. Donegan" <donegan@quick.net> Cc: Christian Kuhtz <ck@ns1.adsu.bellsouth.com>, Mike Smith <mike@smith.net.au>, Josh Tiefenbach <josh@ican.net>, The Hermit Hacker <scrappy@hub.org>, freebsd-current@FreeBSD.ORG Subject: Re: NOW/MOSIX/Beowulf Message-ID: <28977.915064476@gjp.erols.com> In-Reply-To: Your message of "Wed, 30 Dec 1998 15:41:24 PST." <Pine.BSI.3.91.981230153706.24396A-100000@oldnews.quick.net>
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"Steven P. Donegan" wrote in message ID <Pine.BSI.3.91.981230153706.24396A-100000@oldnews.quick.net>: > 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
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