From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 49152C61DA4 for ; Fri, 3 Feb 2023 18:07:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232470AbjBCSH3 (ORCPT ); Fri, 3 Feb 2023 13:07:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41984 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232300AbjBCSH0 (ORCPT ); Fri, 3 Feb 2023 13:07:26 -0500 Received: from mail-yb1-xb2b.google.com (mail-yb1-xb2b.google.com [IPv6:2607:f8b0:4864:20::b2b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AF2CEAC21B for ; Fri, 3 Feb 2023 10:07:25 -0800 (PST) Received: by mail-yb1-xb2b.google.com with SMTP id i2so3978170ybt.2 for ; Fri, 03 Feb 2023 10:07:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=6VCuW4qqyhbK9ZAeU0nJrKAb3cF+AQhIuURZuWyOsUc=; b=lG/BM7fy0pRuo+WYconWg7P8C6C2fOD4T28LEUaTO3KoDcHwpaxGR1g4YzIqj8xaYM nHzIjIlsZCahJwp887gl0jt1G/ie409+aNtIKkI8dnOV9EL4LcaYw4ZQXOsx2v8ut9x4 +WLlxAhmPF/1LImhuDKCyqIblrWmjVfZGXESBrvrx3RFcAI61cXVCUXXlmt2FQY6xa2t IxtjP2Z8vVmeSgUpDqSLZJOhUAVyXHTFG0NdjKvw6AQMmICVoWy6zTb/Uj8GMFj4IG8E EkMMWwwtjVRcxA4KYcr4+wqdbqYP/u/BxPhRjy1f6s1og92urjnk3sSJNFZoUXCpreEk ogFQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=6VCuW4qqyhbK9ZAeU0nJrKAb3cF+AQhIuURZuWyOsUc=; b=N1NCgtRl3foj7DmPfGmUuwxjjWjRY5tjYbt5xTdDyM+jK7e0ytgHor4ljlog2/XJHP vVq5hyYjpjw9xw2ezeQQ1hT3CMxEoL3pOHz3SJSnw7pWIg/hnUlI2W4ZMeb9f5B281bH wY3G782GDzsMjaN/fIDouIRATK/VkgT7i1dHy4OcLIgcMjciwl7LCBx3Kv+rD6M24Gpf +eZ9J1j97IeeZgaeYt5M9a7J+p9Rc1vWQ+MrqEyQnbDy/ljDffZIlRwDzHWFj8EXZeQp 4fG9kXNO5EylMoVVeq/pFdbajZJLSpAiauMjgNFlCzC3BdyUkfnNO3XiLLKCZSODcabk Y10A== X-Gm-Message-State: AO0yUKUWQ0ihv/da41JX9CIULEEqKIKmw/i/TUInwaS8fcUil8v/7ayM bCRWIE7Fq5qXZY0KSlp0DyA5HY5q+/GyCJCG9pE= X-Google-Smtp-Source: AK7set9aTOe/et2098FA2NucGDx9IEZ+Co0Q3VfZEqCMbXsfptjji/nyQlApqcdaR9FW6XMSH3aAWhSJO71BIy+bmlo= X-Received: by 2002:a5b:610:0:b0:871:347:96b4 with SMTP id d16-20020a5b0610000000b00871034796b4mr231268ybq.262.1675447644691; Fri, 03 Feb 2023 10:07:24 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Ankit Kumar Date: Fri, 3 Feb 2023 23:36:40 +0530 Message-ID: Subject: Re: Reverse Sequential Read or Write To: Jay Han Cc: fio@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: fio@vger.kernel.org Hey Jan, Replying again as the first one didn't go to the mailing list because of that not being in plain text. Yes, you can read/write in reverse order and there is already an example fio configuration. Check out: https://github.com/axboe/fio/blob/master/examples/backwards-read.fio Regards Ankit On Fri, Feb 3, 2023 at 10:58 PM Jay Han wrote: > > Hello, > I am trying to configure a sequential read or write pattern that reads > or writes in reverse manner in terms of LBAs. Is this feasible with > the features that are in current build? If so, any guidance would be > greatly appreciated. > > Thank you, > Jay,