From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe Subject: Re: RBD speed vs threads Date: Fri, 15 Jun 2012 22:29:25 +0200 Message-ID: <4FDB9B25.1080707@profihost.ag> References: <4FDACEAA.8080306@profihost.ag> <4FDB24A0.8000401@inktank.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.profihost.ag ([85.158.179.208]:50216 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757601Ab2FOU3Y (ORCPT ); Fri, 15 Jun 2012 16:29:24 -0400 In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Sage Weil Cc: Mark Nelson , "ceph-devel@vger.kernel.org" Am 15.06.2012 18:33, schrieb Sage Weil: > The one other thing worth mentioning here is that "thread" is really a > misnomer. Rados bench is actually dispatching it's IO asynchronously from > a single thread, and the -t option is really controlling the number of > IO's in flight. That is more or less what you get if you have N threads > doing a single synchronous IO each, which is why the option is called > that. THX Stefan