From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtprelay0187.hostedemail.com ([216.40.44.187]:37508 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754548Ab3JCUGA (ORCPT ); Thu, 3 Oct 2013 16:06:00 -0400 Message-ID: <524DCE29.3050808@nellans.org> Date: Thu, 03 Oct 2013 15:06:01 -0500 From: David Nellans MIME-Version: 1.0 Subject: Re: precondition ssd drives w/ fio References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: fio-owner@vger.kernel.org List-Id: fio@vger.kernel.org To: "Brian L." , "fio@vger.kernel.org" On 10/03/2013 02:31 PM, Brian L. wrote: > For benchmarking SSD drives, I was told that we should precondition > our drives to get more accurate real world reading. > > I was wondering if anyone is using fio itself to precondition ssd > drives or use a different script to populate random data on the > drives? > > Thanks in advance. > > Brian L. > -- > To unsubscribe from this list: send the line "unsubscribe fio" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > fio is flexible enough that it can precondition with just about any shape of traffic you're willing to craft a job for. but what traffic you believe is representative of your real world use case is entirely up to you and can have dramatic affect on the garbage collection efficiency of the drive. google "ssd preconditioning" and many of the flash manufacturers have whitepapers on how/why you might choose to precondition your drives before doing any benchmarking.