From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lulu.zabbo.net ([69.168.54.52]:52798 "EHLO lulu.zabbo.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932111Ab2FNQbu (ORCPT ); Thu, 14 Jun 2012 12:31:50 -0400 Received: from [192.168.242.10] (50-193-208-193-static.hfc.comcastbusiness.net [50.193.208.193]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by lulu.zabbo.net (Postfix) with ESMTPSA id EC2932216CB for ; Thu, 14 Jun 2012 09:31:49 -0700 (PDT) Message-ID: <4FDA11F5.6050703@zabbo.net> Date: Thu, 14 Jun 2012 09:31:49 -0700 From: Zach Brown MIME-Version: 1.0 To: linux-btrfs@vger.kernel.org Subject: Re: Question, Does BTRFS provide a read speed increase with RAID1 References: <4FD9AAA0.2040802@gmx.net> <20120614095232.GL32402@twin.jikos.cz> In-Reply-To: <20120614095232.GL32402@twin.jikos.cz> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: > I'd like to find a better mirror selection hint that would work well on > avearage and will get back to it someday, unless somebody else wants to > continue experimenting here. Well, for some context you can see what the existing kernel raid implementations do: drivers/md/raid1.c:read_balance() drivers/md/dm-raid1.c:do_reads() - z