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 X-Spam-Level: X-Spam-Status: No, score=-0.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1FCE2C31E48 for ; Wed, 12 Jun 2019 07:55:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E1AE82080A for ; Wed, 12 Jun 2019 07:55:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="TvulknlB" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2436646AbfFLHzL (ORCPT ); Wed, 12 Jun 2019 03:55:11 -0400 Received: from mail-pl1-f178.google.com ([209.85.214.178]:33522 "EHLO mail-pl1-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2407657AbfFLHzK (ORCPT ); Wed, 12 Jun 2019 03:55:10 -0400 Received: by mail-pl1-f178.google.com with SMTP id c14so14982plo.0 for ; Wed, 12 Jun 2019 00:55:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=to:from:subject:message-id:date:user-agent:mime-version :content-language:content-transfer-encoding; bh=4pkbh9VHHra7RLHot+OJBI/nZ7dvpr9A9udrrVHGQNA=; b=TvulknlB6D7LpUYU1L4+vjs7GoVtltEXKx0VK6DDUu8H0g4HwLFxr18kaxj3Gn2mrn 1gU93ghvGvtrVlCZOVskTRYjOtgKSnXqRbNcfohRT/TxeTdHmX17UisW+otUaYgZrAtw CVqJT+5se2zmsiOsfN3cdoI7ElT5FUXht4YGxaaLrkGIrQPSKzqT1lVgiQ3zHDRuZ9v3 OI1tSscolhzLIYbWI2GamMUjOv8gGKUO+q161B8NG8plQ/oLcc40JKYLqDbGsWDvHgGA KCkZ0TMMMNZgKS01AkPr3KmQFPXM8KaafCt1Q7F+k1ZtGbvk2DzhXhhEns2J9m25ZSmK pZuA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:to:from:subject:message-id:date:user-agent :mime-version:content-language:content-transfer-encoding; bh=4pkbh9VHHra7RLHot+OJBI/nZ7dvpr9A9udrrVHGQNA=; b=f13oNCGnr4qZpIgP2cB+YAeIIoVK3ukXBcBEbc81WdXF7vJ0a4rfXzAlqYYpFDvMyr bBHYPLu12yZafFaoHrqUM0xGZY1BUl+f0ZoO9QIzWEd+xgQ8G2dSVrI3tt+5TfcXbfuc Y+nW/AoSzFvlthiBKdEHPhmEfQRMFj3rki/qRNu/kfx0umxNqxNva0dERVfOVI8hxkfC KXFiAre2VHveB05X8C66WCNrnTwOhdnEbLHL0RCyLh7uBso82jxH5RgU3R1cSXiKTjjX kl9iG8kLxZkQKjRhmMNmJ2TtmcfBBZUUqbnZH64UPvWWcR0sN9Ouj6kQvL7FKJv6Rz3e hVAw== X-Gm-Message-State: APjAAAWWaxUAxF+NHu4jLLhFBrMLL+4O+cTMGAdIWFqrFXY8FgEnF3+h yBEn8jTRg7yb/5Z1p56OL5CWQiWU X-Google-Smtp-Source: APXvYqzvX/MWJeq+AM+ciU8BGwy5I3jia7qyT26zCVEW6Y7hOvUjIsc5m2yeg5R1iU/ZHSLHZe7Ypw== X-Received: by 2002:a17:902:2f:: with SMTP id 44mr18474112pla.5.1560326109585; Wed, 12 Jun 2019 00:55:09 -0700 (PDT) Received: from [0.0.0.0] ([47.244.216.228]) by smtp.gmail.com with ESMTPSA id b26sm14014367pfo.129.2019.06.12.00.55.08 for (version=TLS1_3 cipher=AEAD-AES128-GCM-SHA256 bits=128/128); Wed, 12 Jun 2019 00:55:09 -0700 (PDT) To: linux-nfs@vger.kernel.org From: Jianchao Wang Subject: Can we setup pNFS with multiple DSs ? Message-ID: <71d00ed4-78b8-cefb-4245-99f3e53e5d2a@gmail.com> Date: Wed, 12 Jun 2019 15:55:07 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:67.0) Gecko/20100101 Thunderbird/67.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Hi I'm trying to setup a pNFS experiment environment. And this is what I have got, VM-0 (DS) running a iscsi target VM-1 (MS) initiator, mount a XFS on the device, and export it by NFS with pnfs option VM-2 (Client) initiator, but not mount, running a blkmapd mount the shared directory of VM-1 by NFS And it semes to work well as the mountstatus LAYOUTGET: 14 14 0 3472 2744 1 1381 1384 GETDEVICEINFO: 1 1 0 196 148 0 5 5 LAYOUTCOMMIT: 8 8 0 2352 1368 0 1256 1257 The kernel version I use is 4.18.19. And would anyone please help to clarify following questions ? 1. Can I involve multiple DSs here ? 2. Is this stable enough to use in production ? How about earlier version, for example 4.14 ? Many thanks in advance Jianchao