Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933049AbZDHPQa (ORCPT ); Wed, 8 Apr 2009 11:16:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752113AbZDHPQR (ORCPT ); Wed, 8 Apr 2009 11:16:17 -0400 Received: from out2.smtp.messagingengine.com ([66.111.4.26]:36637 "EHLO out2.smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751087AbZDHPQQ (ORCPT ); Wed, 8 Apr 2009 11:16:16 -0400 X-Sasl-enc: Hrcb1aKGTOeqOWj3Sj6wQfXC2HbB7hUjlau0dQvZn6y3 1239203774 Date: Wed, 8 Apr 2009 12:16:12 -0300 From: Henrique de Moraes Holschuh To: Mikulas Patocka Cc: Lee Revell , Ric Wheeler , Theodore Tso , Ric Wheeler , Jens Axboe , device-mapper development , Linux Kernel Mailing List , ak@linux.intel.com, "MASON, CHRISTOPHER" Subject: Re: [dm-devel] Barriers still not passing on simple dm devices... Message-ID: <20090408151612.GF7802@khazad-dum.debian.net> References: <20090326084205.GG27476@kernel.dk> <20090331104933.GJ5178@kernel.dk> <20090403081131.GP5178@kernel.dk> <49D77AC3.3020207@redhat.com> <20090405012839.GF7553@mit.edu> <49D89C06.1060700@gmail.com> <75b66ecd0904051814n353bb69bp76a38e36cac4d3fe@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-GPG-Fingerprint: 1024D/1CDB0FE3 5422 5C61 F6B7 06FB 7E04 3738 EE25 DE3F 1CDB 0FE3 User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 990 Lines: 22 On Wed, 08 Apr 2009, Mikulas Patocka wrote: > I have seen an installation having generator backup, but with another > serious flaw --- if someone plugged a computer causing short-circuit, it > turned off the circuit breaker for the whole rack :) You will be hard-pressed to find datacenters where the above is NOT true :-) Although, usually one has TWO independent power feeds per rack, so a short is likely to bring down just half of it, and any equipment properly set up with dual independent power feeds should survive... -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/