From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946060AbWGPBHP (ORCPT ); Sat, 15 Jul 2006 21:07:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1946062AbWGPBHP (ORCPT ); Sat, 15 Jul 2006 21:07:15 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:8128 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S1946060AbWGPBHO (ORCPT ); Sat, 15 Jul 2006 21:07:14 -0400 Subject: Re: raid io requests not parallel? From: Arjan van de Ven To: Jonathan Baccash Cc: linux-kernel@vger.kernel.org In-Reply-To: References: Content-Type: text/plain Date: Sun, 16 Jul 2006 03:07:12 +0200 Message-Id: <1153012032.3033.0.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > So.... why doesn't the raid issue the writes in parallel? because you use O_DIRECT, which means your application waits for the write to hit the disk before doing the next write ;)