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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_PASS,UNPARSEABLE_RELAY 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 04ACBC10F05 for ; Mon, 1 Apr 2019 16:22:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C457921473 for ; Mon, 1 Apr 2019 16:22:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="drGr3G7c" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726854AbfDAQWD (ORCPT ); Mon, 1 Apr 2019 12:22:03 -0400 Received: from aserp2130.oracle.com ([141.146.126.79]:45966 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727032AbfDAQWD (ORCPT ); Mon, 1 Apr 2019 12:22:03 -0400 Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x31GIYUt089880 for ; Mon, 1 Apr 2019 16:22:01 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=to : from : subject : message-id : date : mime-version : content-type : content-transfer-encoding; s=corp-2018-07-02; bh=rRA8KFhCJ4e2PhHqpq73WVPHvMmHN+3ZebfKmrIn2ic=; b=drGr3G7cz1U54qZhYYtJdwQmTKxwa5ObTEkuO7mgx+IC8e0V+2LEiKJFOuWSb3qZlIKT ZiMBblzm7f1HshljeHyrGYsCeUvgBC9ORM6IrYgLOQyqUXLMdfRg9zKdF5zuyCg8xi/r /ebK0QxYuI6JnIYxXURcEkxt6xj9KAmO7/8UoXLPfpOoxbZ5nYrTA++tFQw3gM522gMl plRa62YYoFW2QEg59/aynGE1WeAFfcNaS5j1wqA6AncVsULJpah3jHYK7a2LzTv+WtFt 27vVgaJzyuj4Y3HTsN0a7t8CCgM1QWTRVYsCL8piJc/VzB7hpTeOUk+02X7jK1X0vpYY GA== Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by aserp2130.oracle.com with ESMTP id 2rhwyd08px-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Mon, 01 Apr 2019 16:22:01 +0000 Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id x31GLoXp020251 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Mon, 1 Apr 2019 16:21:50 GMT Received: from abhmp0001.oracle.com (abhmp0001.oracle.com [141.146.116.7]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x31GLo2S015990 for ; Mon, 1 Apr 2019 16:21:50 GMT Received: from bradley.us.oracle.com (/10.152.12.111) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 01 Apr 2019 09:21:50 -0700 To: linux-nfs@vger.kernel.org From: "Bradley C. Kuszmaul" Subject: directory delegations Message-ID: <2065755c-f888-9c62-f6e5-f143d42c51ee@oracle.com> Date: Mon, 1 Apr 2019 12:21:49 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9214 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=719 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904010108 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Hi, I'm the architect for Oracle's File Storage Service.   FSS is basically a big scalable NFS server that runs in Oracle's cloud. Our metadata operations have higher latency than a vanilla NFS server (e.g., a Linux NFS server serving a XFS stored on a block device), and we suspect that directory delegations would make a big performance improvement. I understand, however, that essentially no one implements directory delegations. Can anyone fill me in on the current thinking of the future of support for directory delegations in the Linux NFS client? -Bradley