From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dkim1.fusionio.com ([66.114.96.53]:40925 "EHLO dkim1.fusionio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756916Ab3DYVKW (ORCPT ); Thu, 25 Apr 2013 17:10:22 -0400 Received: from mx1.fusionio.com (unknown [10.101.1.160]) by dkim1.fusionio.com (Postfix) with ESMTP id C687A7C0425 for ; Thu, 25 Apr 2013 15:10:21 -0600 (MDT) Date: Thu, 25 Apr 2013 17:10:19 -0400 From: Josef Bacik To: Matt Pursley CC: Josef Bacik , "linux-btrfs@vger.kernel.org" Subject: Re: One random read streaming is fast (~1200MB/s), but two or more are slower (~750MB/s)? Message-ID: <20130425211019.GM2631@localhost.localdomain> References: <20130417065506.GA21083@panda> <20130418215856.GA2305@localhost.localdomain> <20130425203900.GL2631@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" In-Reply-To: Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Thu, Apr 25, 2013 at 03:01:18PM -0600, Matt Pursley wrote: > Ok, awesome, let me know how it goes.. I don't have the raid > formatted to btrfs right now, but I could probably do that in about 30 > minutes or so. > Huh so I'm getting the full bandwidth, 120 mb/s with one thread and 60 mb/s with two threads. These are just cheap sata drives tho, I'll try and dig up a box with 3 fusion cards for something a little closer to the speeds you are seeing and see if that makes a difference. Thanks, Josef