From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from 87-104-106-3-dynamic-customer.profibernet.dk ([87.104.106.3]:35826 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932096Ab1IIIhg (ORCPT ); Fri, 9 Sep 2011 04:37:36 -0400 Message-ID: <4E69D04E.3090705@kernel.dk> Date: Fri, 09 Sep 2011 10:37:34 +0200 From: Jens Axboe MIME-Version: 1.0 Subject: Re: [PATCH 1/2] Added replay_rebase option to run multi-threaded log replay on different disk sectors. References: <4E69A048.6050509@rakugaki.org> In-Reply-To: <4E69A048.6050509@rakugaki.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: fio-owner@vger.kernel.org List-Id: fio@vger.kernel.org To: Taisuke Yamada Cc: fio@vger.kernel.org On 2011-09-09 07:12, Taisuke Yamada wrote: > Hi. > > I'm now trying to run multi-threaded log replay, and noticed > all threads are accessing same sector on a disk. Of course, > this is an expected behavior of "replay". > > But since I also wanted to have each thread accessing different > parts of the disk to increase a load, but still following the > access pattern of the original, I added "replay_rebase" option to > shift offset of IO request for each thread. > > Althrough there's "1/2" in the subject, this patch is complete > by itself. Next one (2/2) is related, but handles different issue. Thanks, I can see this being handy. I can apply this, but I would much prefer if you resend it with the proper updates to HOWTO and fio.1 adding the new option. Otherwise nobody is going to learn about it. -- Jens Axboe