From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750773AbVHGCvp (ORCPT ); Sat, 6 Aug 2005 22:51:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750776AbVHGCvo (ORCPT ); Sat, 6 Aug 2005 22:51:44 -0400 Received: from omx2-ext.sgi.com ([192.48.171.19]:3007 "EHLO omx2.sgi.com") by vger.kernel.org with ESMTP id S1750773AbVHGCvo (ORCPT ); Sat, 6 Aug 2005 22:51:44 -0400 Date: Sun, 7 Aug 2005 12:51:22 +1000 From: Greg Banks To: Justin Piszcz Cc: linux-kernel@vger.kernel.org Subject: Re: Kernel 2.6.xx - NFSv3 vs. Samba Data Transfer Semantics Message-ID: <20050807025121.GA26391@sgi.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.5.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Aug 06, 2005 at 10:34:55AM -0400, Justin Piszcz wrote: > UDP/NFSv3: Don't use UDP. It won't help you with this problem, but use TCP. > UDP/Samba, Win2K->Linux box: ^^^ That would be a surprise. > When NFS transfers are taking > place, watching gkrellm, I see 64MB/s for a few seconds then it goes to 0 > as the disk (hda) continues to write for 3-4 seconds, this continues on > and off. It's instructive to watch the server's disk traffic on a graph with the same timescale as the network traffic. > I am using XFS filesystems on both Linux machines. The drives are 7200RPM > Seagate HDDs with either 2MB or 8MB of cache. With a single drive, your transfer rate is going to be disk limited to probably 40-50 MB/s anyway. > Are there any 'tweaks' or 'hacks' to make NFS behave more like Samba or The 'async' export option. RTFM before you use it. Greg. -- Greg Banks, R&D Software Engineer, SGI Australian Software Group. I don't speak for SGI.