From owner-freebsd-questions@FreeBSD.ORG Wed Dec 31 09:35:50 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D6133106564A for ; Wed, 31 Dec 2008 09:35:50 +0000 (UTC) (envelope-from bernard@dugas-family.org) Received: from smtp11.ispronet.com (smtp11.ispronet.com [81.28.196.233]) by mx1.freebsd.org (Postfix) with ESMTP id 89D6D8FC12 for ; Wed, 31 Dec 2008 09:35:50 +0000 (UTC) (envelope-from bernard@dugas-family.org) Received: from localhost (unknown [127.0.0.1]) by smtp11.ispronet.com (Postfix) with ESMTP id B4405B82F; Wed, 31 Dec 2008 10:35:49 +0100 (CET) Received: from smtp11.ispronet.com ([127.0.0.1]) by localhost (smtp11.ispronet.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 57017-06; Wed, 31 Dec 2008 10:35:40 +0100 (CET) Received: from [192.168.1.50] (unknown [81.28.194.61]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp11.ispronet.com (Postfix) with ESMTP; Wed, 31 Dec 2008 10:35:40 +0100 (CET) Message-ID: <495B3D63.2030005@dugas-family.org> Date: Wed, 31 Dec 2008 10:37:39 +0100 From: Bernard Dugas User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; fr-FR; rv:1.7) Gecko/20040616 X-Accept-Language: fr,en MIME-Version: 1.0 To: Peter Boosten References: <20081216094719.EDCEE1065675@hub.freebsd.org> <495930E4.1030501@dugas-family.org> <20081229230115.F68805@wojtek.tensor.gdynia.pl> <4959DFEF.5090407@dugas-family.org> <20081230150507.U87347@wojtek.tensor.gdynia.pl> <495A3957.9050002@dugas-family.org> <495A3C72.5070802@unsane.co.uk> <20081230201351.L12391@wojtek.tensor.gdynia.pl> <495A9595.6080201@dugas-family.org> <20081231002557.D45571@wojtek.tensor.gdynia.pl> <495B2516.4020904@dugas-family.org> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: amavisd-new at ispronet.com Cc: "freebsd-questions@freebsd.org" Subject: Re: Optimising NFS for system files X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 31 Dec 2008 09:35:51 -0000 Peter Boosten wrote: >> On server, it means : 1440MB / 84s = 17MB/s >> On client, that becomes : 1440MB / 266s = 5.4MB/s >> >> I know the disk is not very fast, but i would like the NFS layer not >> to add too much... >> >> I don't want my users to wait between 3 or 4 times more because >> computer is using NFS. > > In my opinion there are more considerations than only nfs: the data is > pulled twice over the network, and the tar process might initiate > paging which is done over the network as well. The tar comparison is > not a good one. I would welcome any way to check that idea on the system. But : - tar is directed to /dev/null so that should avoid any physical writing ; - there is still memory FREE on both server and client while taring ; - the effect of tar is the same on server and client, so the "induced error" should be the same time on both. Thanks a lot, Best regards, -- Bernard DUGAS Mobile +33 615 333 770