From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 2 May 2001 13:49:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 2 May 2001 13:49:09 -0400 Received: from nat-pool.corp.redhat.com ([199.183.24.200]:55125 "EHLO devserv.devel.redhat.com") by vger.kernel.org with ESMTP id ; Wed, 2 May 2001 13:49:05 -0400 Message-ID: <3AF048FA.1B5EA399@redhat.com> Date: Wed, 02 May 2001 13:50:50 -0400 From: Doug Ledford X-Mailer: Mozilla 4.76 [en] (X11; U; Linux 2.2.17-11 i686) X-Accept-Language: en MIME-Version: 1.0 To: Mike Anderson CC: Eric.Ayers@intec-telecom-systems.com, James Bottomley , "Roets, Chris" , linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org Subject: Re: Linux Cluster using shared scsi In-Reply-To: <200105011445.KAA01117@localhost.localdomain><3AEEDFFC.409D8271@redhat.com> <15086.60620.745722.345084@gargle.gargle.HOWL> <3AF025AE.511064F3@redhat.com> <20010502102037.A19349@us.ibm.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Mike Anderson wrote: > > Doug, > > A question on clarification. > > Is the configuration you are testing have both FC adapters going to the same > port of the storage device (mutli-path) or to different ports of the storage > device (mulit-port)? > > The reason I ask is that I thought if you are using SCSI-2 reserves that the > reserve was on a per initiator basis. How does one know which path has the > reserve? Reservations are global in nature in that a reservation with a device will block access to that device from all other initiators, including across different ports on multiport devices (or else they are broken and need a firmware update). > On a side note. I thought the GFS project had up leveled there locking / fencing > into a API called a locking harness to support different kinds of fencing > methods. Any thoughts if this capability could be plugged into this service so > that users could reduce recoding depending on which fencing support they > selected. I wouldn't know about that. -- Doug Ledford http://people.redhat.com/dledford Please check my web site for aic7xxx updates/answers before e-mailing me about problems