From owner-freebsd-net@FreeBSD.ORG Mon Jul 7 16:41:52 2008 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 55A6A1065674 for ; Mon, 7 Jul 2008 16:41:52 +0000 (UTC) (envelope-from nettwork@gmx.de) Received: from mail.gmx.net (mail.gmx.net [213.165.64.20]) by mx1.freebsd.org (Postfix) with SMTP id 971278FC13 for ; Mon, 7 Jul 2008 16:41:51 +0000 (UTC) (envelope-from nettwork@gmx.de) Received: (qmail invoked by alias); 07 Jul 2008 16:15:09 -0000 Received: from e178233171.adsl.alicedsl.de (HELO [10.0.0.100]) [85.178.233.171] by mail.gmx.net (mp007) with SMTP; 07 Jul 2008 18:15:10 +0200 X-Authenticated: #46460896 X-Provags-ID: V01U2FsdGVkX19o38J0xW5oi/OZ6hvbzePwDoOmMriTkqf6I+gD1z 1X5cdcHwOyDMGF From: Achim To: freebsd-net@freebsd.org Date: Mon, 7 Jul 2008 16:15:40 +0000 User-Agent: KMail/1.9.7 MIME-Version: 1.0 Content-Disposition: inline Message-Id: <200807071615.40987.nettwork@gmx.de> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 X-FuHaFi: 0.64 Subject: smbmount / smbclient : strangely varying transfer speeds X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Jul 2008 16:41:52 -0000 Hello List, I've experienced the following with both a kubuntu and a FBSD7 client and FBSD7 as server: When i try to copy a file off a *mounted* CIFS/SMB-share I get transfer rates below 1 MByte/sec. If i start a second, concurrent transfer i am getting transfer rates around 8MB/s on *each* transfer (Gigabit link). As soon as one transfer stops, the other is dropping to the old rate below 1MB/s. Copying TO the server works fine, atleast from the kubuntu client, the fbsd client isnt here atm. It speeds up the initial transfer to about 3.5MB/s, about half of what a concurrent download does. A single transfer via smbclient yields ~8MB/s. In other Words: Performance with a single client is degraded when the client is smbmount and downloading. With a second transfer in any direction, performance becomes better, to about 3.5 resp. 8 MB/s depending on the second connection up- or downloading. Unlike smbmount, single smbclient transfers yield acceptable results. Anyone with an idea as what to try? My wireshark skills aren't too advanced and i could not find any notable difference between the captures of each transfer type (single mounted, multiple mounted and single smblient), anything i should watch out for? The machines are connected over a simple soho gigabit switch, no fancy network between them. thanks in advance, Achim