From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cantor2.suse.de ([195.135.220.15]:34699 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755308AbaAVMY5 (ORCPT ); Wed, 22 Jan 2014 07:24:57 -0500 Date: Wed, 22 Jan 2014 13:24:56 +0100 From: David Sterba To: dsterba@suse.cz, Hugo Mills , Austin S Hemmelgarn , Sandy McArthur , Toggenburger Lukas , "linux-btrfs@vger.kernel.org" Subject: Re: Working on Btrfs as topic for master thesis Message-ID: <20140122122456.GH6498@twin.jikos.cz> Reply-To: dsterba@suse.cz References: <8E968DF3B7EC0D40B67B5A9D25675A6A03FC70@MBXSRV03EDU.edu.local> <52DD148E.3060200@gmail.com> <52DE6747.4050404@gmail.com> <20140121165200.GF3314@carfax.org.uk> <20140122122010.GG6498@twin.jikos.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20140122122010.GG6498@twin.jikos.cz> Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Wed, Jan 22, 2014 at 01:20:10PM +0100, David Sterba wrote: > I haven't done any extensive testing, only streaming writes, and the > heuristic just batched writes by a given threshold before switching to > another mirror. Load balancing was done without any logic that would > look at actual IO load of the devices. For me, the result was that > there's room for improvement. http://www.spinics.net/lists/linux-btrfs/msg12745.html http://www.spinics.net/lists/linux-btrfs/msg17228.html