From owner-freebsd-geom@FreeBSD.ORG Mon Feb 27 21:11:50 2006 Return-Path: X-Original-To: freebsd-geom@freebsd.org Delivered-To: freebsd-geom@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 35B4D16A420 for ; Mon, 27 Feb 2006 21:11:50 +0000 (GMT) (envelope-from oxy@field.hu) Received: from green.field.hu (green.field.hu [217.20.130.28]) by mx1.FreeBSD.org (Postfix) with ESMTP id CA2DA43D5A for ; Mon, 27 Feb 2006 21:11:45 +0000 (GMT) (envelope-from oxy@field.hu) Received: from localhost (green.field.hu [217.20.130.28]) by green.field.hu (Postfix) with ESMTP id 827DE11A1FC; Mon, 27 Feb 2006 22:09:44 +0100 (CET) Received: from green.field.hu ([217.20.130.28]) by localhost (green.field.hu [217.20.130.28]) (amavisd-new, port 10024) with ESMTP id 72086-03; Mon, 27 Feb 2006 22:09:44 +0100 (CET) Received: from oxy (dsl85-238-76-25.pool.tvnet.hu [85.238.76.25]) by green.field.hu (Postfix) with ESMTP id 2B1C6119CD5; Mon, 27 Feb 2006 22:09:44 +0100 (CET) Message-ID: <000601c63be2$6ac23d00$0201a8c0@oxy> From: "OxY" To: "Terje Elde" References: <000b01c63b0f$c0779b10$0201a8c0@oxy> <44023791.2090008@elde.net> Date: Mon, 27 Feb 2006 22:11:46 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-2"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2670 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 X-Virus-Scanned: by Amavisd-new (Spamassassin+Razor2+Pyzor+DCC+Bayes db, Clamd Antivirus) at field.hu Cc: freebsd-geom@freebsd.org Subject: Re: which mirror balance algorithm to use? 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: Mon, 27 Feb 2006 21:11:50 -0000 thanks a lot, i choosed load balance, one of my disks is slow. performance is great, load is low :) thxx! best wishes! ----- Original Message ----- From: "Terje Elde" To: "OxY" Cc: Sent: Monday, February 27, 2006 12:19 AM Subject: Re: which mirror balance algorithm to use? > OxY wrote: >> my box is a file server, it has about ~100-150 simultaneous connection >> all the time, so the disks are very busy.. >> i'd like to use the best performance balance algorithm to reduce disk >> load, which is about 80-90% now.. >> which one should i use? 'load' and 'round-robin'? >> why? >> > > There are many factors here. If you're using both slow and fast disks, > using the load algorithm might have some advantages for example. > > I know this isn't the answer you want, but the best way to go about this > might actually be to test the different algorithms. It's easy enough to > change, and then you can run up some numbers on how well it seem to be > performing with the different ones in your setup. Best thing would be > if you could run with a simulated load after hours, so you can get the > exact same test patterns run for the different algorithms. Combine with > trying them out with real world load, and things should get interesting. > > Terje > >