Return-Path: Received: from cirse-out.extra.cea.fr ([132.167.195.14]:40861 "EHLO cirse-out.extra.cea.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750870Ab0LMIPj (ORCPT ); Mon, 13 Dec 2010 03:15:39 -0500 Received: from pisaure.intra.cea.fr (pisaure.intra.cea.fr [132.166.88.21]) by cirse.extra.cea.fr (8.14.2/8.14.2/CEAnet-Internet-out-2.0) with ESMTP id oBD7kO9I030268 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Mon, 13 Dec 2010 08:46:25 +0100 Received: from muguet1.intra.cea.fr (muguet1.intra.cea.fr [132.166.192.6]) by pisaure.intra.cea.fr (8.14.4/8.14.4) with ESMTP id oBD7kOrf032103 for ; Mon, 13 Dec 2010 08:46:24 +0100 (envelope-from philippe.deniel@cea.fr) Received: from zia.bruyeres.cea.fr (esteban.dam.intra.cea.fr [132.165.76.10]) by muguet1.intra.cea.fr (8.13.8/8.13.8/CEAnet-Intranet-out-1.1) with SMTP id oBD7kOw3030293 for ; Mon, 13 Dec 2010 08:46:24 +0100 Message-ID: <4D05CF50.1010305@cea.fr> Date: Mon, 13 Dec 2010 08:46:24 +0100 From: DENIEL Philippe To: linux-nfs@vger.kernel.org Subject: Side effects of having NFSv4 mounted over udp Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-nfs-owner@vger.kernel.org List-ID: MIME-Version: 1.0 Hi, I know NFSv4 is definitely a connection oriented protocol, but noting prevent from using "mount -t nfs4 -o proto=udp <...>". Using TCP instead of UDP could be of great interest, especially in a HPC context where thousands of clients will operate at the same time. If a nfs mount point is made over udp, what would be the side effects ? I tried to run the connectathon on such a udp based mount point and I could find no errors. Is NFSv4/UDP a suitable solution ? Or does it make no sense to use udp ? Thanks in advance for your answer. Regards Philippe