Date: Mon, 21 Aug 2000 06:55:56 -0400 From: "Francisco Reyes" <fran@reyes.somos.net> To: "Andrzej Bialecki" <abial@webgiro.com> Cc: "cluster@freebsd.org" <cluster@freebsd.org> Subject: Re: Sharing disks for failover clustering Message-ID: <200008211046.GAA21318@sanson.reyes.somos.net> In-Reply-To: <Pine.BSF.4.20.0008210956270.20508-100000@mx.webgiro.com>
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On Mon, 21 Aug 2000 10:00:08 +0200 (CEST), Andrzej Bialecki wrote: >Why, if I may ask? If you really want this, you quickly run into all sorts >of nasty locking problems - with NFS as well (most implementations of >lockd do quite poor job). Unless you want to build SSI (single system >image) cluster, you usually want 1 (one) instance of the application >running, and another on the second machine in a standby state (i.e. NOT >accessing the same data). Then, during failover, the first machine >unmounts the shared disk, and the second mounts it, and everybody is happy >Am I missing something? Crashes usually happen when nobody is around to do the necessary work to change the machines (i.e. vacation, weekend...). It is just the nature of the beast. As a far second best is to try to document things so "anyone" in the IT department can do the changes/reboot. francisco Moderator of the Corporate BSD list http://www.egroups.com/group/BSD_Corporate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-cluster" in the body of the message
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