Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail.aixigo.de ([80.149.209.52]:52943 "EHLO mail.aixigo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752740Ab1JQIKe (ORCPT ); Mon, 17 Oct 2011 04:10:34 -0400 Received: from srvvm01.ac.aixigo.de. (mail.ac.aixigo.de [172.19.96.11]) by mail.aixigo.com (8.14.3/8.14.3) with ESMTP id p9H7rcwm003269 for ; Mon, 17 Oct 2011 09:53:38 +0200 (CEST) Received: from dpcl082.ac.aixigo.de (dpcl082.ac.aixigo.de [172.19.97.128]) by srvvm01.ac.aixigo.de. (8.14.3/8.14.3/Debian-9.4) with ESMTP id p9H7rblB032368 for ; Mon, 17 Oct 2011 09:53:38 +0200 Message-ID: <4E9BDF01.6090106@aixigo.de> Date: Mon, 17 Oct 2011 09:53:37 +0200 From: Harald Dunkel MIME-Version: 1.0 To: linux-nfs@vger.kernel.org Subject: nfs3 30% faster than nfs4? Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-nfs-owner@vger.kernel.org List-ID: Hi folks, I did a brief test on a local nfs server: Extracting the linux kernel sources on a nfs partition it seems that nfs3 is 30% faster than nfs4. For nfs3 I got 5.2MB/sec. Nfs4 gave me just 3.8MB/sec. The server was idle except for this test. Client and server were running 2.6.39 from the Debian backports repository. I just changed the mount option on the client to select nfs3 or nfs4. I don't want to complain, but I did not expect this huge loss in performance for moving to nfs4. Any helpful comment would be highly appreciated. Harri