Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754544AbZDFBOy (ORCPT ); Sun, 5 Apr 2009 21:14:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752869AbZDFBOp (ORCPT ); Sun, 5 Apr 2009 21:14:45 -0400 Received: from yw-out-2324.google.com ([74.125.46.31]:48859 "EHLO yw-out-2324.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751549AbZDFBOo (ORCPT ); Sun, 5 Apr 2009 21:14:44 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=pLvMzTIruCZHQUtuksrE48luJ/dT0bXB/A6dnGR9cBNQzUld8LjOm6WQEXXCsPcyQF wgvsoxOKvn1J3WYUOt6fqutSRyyboEr4VuWBJuxvPFmObxArqcTA4TuQ8G5el0p+IKvw fZSpNk8OlntkLXQuzW+J9eWC6I99wfIEtwglI= MIME-Version: 1.0 In-Reply-To: <49D89C06.1060700@gmail.com> References: <20090324150517.GX27476@kernel.dk> <20090326084205.GG27476@kernel.dk> <20090331104933.GJ5178@kernel.dk> <20090403081131.GP5178@kernel.dk> <49D77AC3.3020207@redhat.com> <20090405012839.GF7553@mit.edu> <49D89C06.1060700@gmail.com> Date: Sun, 5 Apr 2009 21:14:42 -0400 X-Google-Sender-Auth: b059344bfa9e8f8d Message-ID: <75b66ecd0904051814n353bb69bp76a38e36cac4d3fe@mail.gmail.com> Subject: Re: [dm-devel] Barriers still not passing on simple dm devices... From: Lee Revell To: Ric Wheeler Cc: Theodore Tso , Ric Wheeler , Jens Axboe , Mikulas Patocka , device-mapper development , Linux Kernel Mailing List , ak@linux.intel.com, "MASON, CHRISTOPHER" Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 858 Lines: 17 On Sun, Apr 5, 2009 at 7:54 AM, Ric Wheeler wrote: > One thing to point out here is that there are a lot of "servers" in high end > data centers that do not have UPS backup. Those racks full of 1U and 2U > boxes that are used to make "grids", "clouds" and so on often are built with > as much gear as you can stuff in a rack - no batteries or UPS to be seen, so > they are really quite similar to the normal desktop or home systems that we > normally run at home :-) These days even bargain basement data centers provide UPS functionality for you, via generator backup and A/B power. Lee -- 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/