From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <542AC2B2.1070801@kernel.dk> Date: Tue, 30 Sep 2014 08:48:18 -0600 From: Jens Axboe MIME-Version: 1.0 Subject: Re: Limit LBA Range References: <5429B424.7080903@kernel.dk> <5429C839.7090408@kernel.dk> <542A1A21.4070406@kernel.dk> In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit To: Andrey Kuzmin , Jon Tango Cc: Sitsofe Wheeler , fio@vger.kernel.org List-ID: On 2014-09-30 03:17, Andrey Kuzmin wrote: > On Tue, Sep 30, 2014 at 1:14 PM, Jon Tango wrote: >> >> The same thing could be done by partitioning the SSD in the operating system with the desired partition size, and then running a time-based fio job against the partition. >> >> Basically, fio options offset/size should yield the same net result, but I'm always unsure on what is the actual effect of mixing size and time_based in a single job, and whether fio will wrap around the specified size to the specified offset if the job is time-based. HOWTO could have used some clarification on size/time_based interaction. >> >> Regards, >> Andrey >> >> On Sep 30, 2014 11:41 AM, "Sitsofe Wheeler" wrote: >>> >>> On 30 September 2014 07:34, Jon Tango wrote: >>>> >>>> The taskfile is this: >>> >>> I should have been more specific - you need to show both the _vdbench_ >>> parameter file that you are comparing to in addition to showing your >>> fio job file. >>> >>> -- >>> Sitsofe |http://sucs.org/~sits/ >>> -- >>> To unsubscribe from this list: send the line "unsubscribe fio" in the >>> body of a message tomajordomo@vger.kernel.org More majordomo info at >>> http://vger.kernel.org/majordomo-info.html >> -- >> 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 >> >> I'm really wanting to avoid the filesystem, they create so much interference. I am focusing on just testing the raw device :) > > I'm not sure why a filesystem should be involved in partitioning, that > happens at the raw device level. I think there's some limitation in Windows that doesn't allow partition raw IO. I may be mistaken. But I agree, partition would work. But just limiting the LBA range with size= will do the same job. -- Jens Axboe