From owner-freebsd-geom@FreeBSD.ORG Thu Mar 5 11:31:56 2009 Return-Path: Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EAF821065670 for ; Thu, 5 Mar 2009 11:31:56 +0000 (UTC) (envelope-from jespasac@minibofh.org) Received: from smtp02.cdmon.com (smtp02.cdmon.com [212.36.74.229]) by mx1.freebsd.org (Postfix) with ESMTP id AF8D98FC31 for ; Thu, 5 Mar 2009 11:31:56 +0000 (UTC) (envelope-from jespasac@minibofh.org) Received: from jespasac.cdmon.com (62.Red-217-126-43.staticIP.rima-tde.net [217.126.43.62]) by smtp02.cdmon.com (Postfix) with ESMTP id 91D33496B2 for ; Thu, 5 Mar 2009 12:31:55 +0100 (CET) Message-ID: <49AFB7C4.4030202@minibofh.org> Date: Thu, 05 Mar 2009 12:30:12 +0100 From: Jordi Espasa Clofent User-Agent: Thunderbird 2.0.0.19 (X11/20090107) MIME-Version: 1.0 To: freebsd-geom@freebsd.org References: <49AF9B6C.8090908@minibofh.org> <49AFB41F.8030204@freebsd.org> In-Reply-To: <49AFB41F.8030204@freebsd.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: gmirror(8): round-robin vs. load algorithm X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Mar 2009 11:31:57 -0000 Ivan Voras escribió: > There are some performance-improving patches for gmirror out there, for > example here: > > http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/113885 Yes, I know it (indeed I've read it previously to write my post). But according my own benchmark (using postmark tool) the performance of 'load' it's the same as 'round-robin'. So, I tend to view 'load' algorithm (even in this current implementation) as a kind of 'secure round-robin' for a servers with high I/O. > Maybe you should contact pjd. He's so busy. I hope he could read this message in list. -- Thanks, Jordi Espasa Clofent