From oracle-l-bounce@freelists.org Tue Sep 14 09:24:25 2004 Return-Path: Received: from air189.startdedicated.com (root@localhost) by orafaq.com (8.11.6/8.11.6) with ESMTP id i8EEOPM10960 for ; Tue, 14 Sep 2004 09:24:25 -0500 X-ClientAddr: 206.53.239.180 Received: from turing.freelists.org (freelists-180.iquest.net [206.53.239.180]) by air189.startdedicated.com (8.11.6/8.11.6) with ESMTP id i8EEOPI10955 for ; Tue, 14 Sep 2004 09:24:25 -0500 Received: from localhost (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id CA23772C514; Tue, 14 Sep 2004 09:30:23 -0500 (EST) Received: from turing.freelists.org ([127.0.0.1]) by localhost (turing [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 13986-11; Tue, 14 Sep 2004 09:30:23 -0500 (EST) Received: from turing (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 3308472C4F4; Tue, 14 Sep 2004 09:30:23 -0500 (EST) Cc: oracle-l@freelists.org Subject: Re: Is RAC really HA on Linux MIME-Version: 1.0 Message-ID: From: Stephen Evans Date: Tue, 14 Sep 2004 10:28:48 -0400 X-MIMETrack: Serialize by Router on notesgv.notes.duke.edu/DUMC_Services/mc/Duke(Release 6.0.4|June 01, 2004) at 09/14/2004 10:28:42 AM, Serialize complete at 09/14/2004 10:28:42 AM Content-type: text/plain X-Scanned-By: MIMEDefang 2.39 Content-Transfer-Encoding: 8bit X-archive-position: 9458 X-ecartis-version: Ecartis v1.0.0 Sender: oracle-l-bounce@freelists.org Errors-To: oracle-l-bounce@freelists.org X-original-sender: evans036@mc.duke.edu Precedence: normal Reply-To: evans036@mc.duke.edu X-list: oracle-l X-Virus-Scanned: by amavisd-new at freelists.org most of our unplanned outages are related to either network or SAN related (ie HBA's not correctly virtualizing the LUNS from the SAN). RAC would have helped with some of these. most of our planned outages are related to OS upgrades & patches, Planned network segment outages, SAN Switch maintenance etc. RAC would also help with most of these. We will often failover our critical oracle apps using standard physical standby. the other major planned outage cause is oracle upgrades/patches - RAC would NOT help with these (maybe in the future???) are many folks out there actually using RAC in a demanding prod environment? steve Niall Litchfield 09/13/2004 02:35 PM Please respond to Niall Litchfield To: Stephen Evans cc: oracle-l@freelists.org Subject: Re: Is RAC really HA on Linux Well I received a quote off-list suggesting that there was a point of view that "Instance Failures account for a huge majority of the outages" If you share this viewpoint, which I don't, then RAC/OPS might count as an HA solution. -- Niall Litchfield Oracle DBA http://www.niall.litchfield.dial.pipex.com -- http://www.freelists.org/webpage/oracle-l