From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([69.77.167.62] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1LYB5Q-0007fR-81 for garchives@archives.gentoo.org; Sat, 14 Feb 2009 03:21:00 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 2B21EE04B5; Sat, 14 Feb 2009 03:20:58 +0000 (UTC) Received: from rv-out-0708.google.com (rv-out-0708.google.com [209.85.198.244]) by pigeon.gentoo.org (Postfix) with ESMTP id E87C4E04B5 for ; Sat, 14 Feb 2009 03:20:57 +0000 (UTC) Received: by rv-out-0708.google.com with SMTP id f25so983815rvb.46 for ; Fri, 13 Feb 2009 19:20:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=Tq/q8SEKRAWSMrPqKX53ax/YIySRH+ItxQoDzQTJUUM=; b=LDRTgoRKQIVSSrm9MYCXGuVLcmAYuaTu4cPJaO7O8cKBw/7W+L0KqUvIH50q2sN0gR axxGCZe7gnkTpqMTJG/nHHB79pBv4YGIoaQvWQsndXivS8z/HtWJnNj+tG+nCy+1DLxv UbVLMCrz/dd1p4vlGQSCF5CL2dtTgyCajA7mU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=ZCWIwwZakkTKO9AazmOBLMeWwOI2f3HVwX76T83BBmxX1xUuJISvRv2fLwrODgU8XI XeyBzC3DhRrjvvAtEIaa5krj2gKPrctrzSQZ1R2AEoPanFJ3bGHnsLNtlp0wRvX4sIYg om+BJ825CXgsFC7FZs2yiu+kz7INJgXjNp6kI= Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-cluster@lists.gentoo.org Reply-to: gentoo-cluster@lists.gentoo.org MIME-Version: 1.0 Received: by 10.140.144.1 with SMTP id r1mr1446162rvd.271.1234581657546; Fri, 13 Feb 2009 19:20:57 -0800 (PST) In-Reply-To: <4989F287.4050201@Sun.COM> References: <4989F287.4050201@Sun.COM> Date: Sat, 14 Feb 2009 11:20:57 +0800 Message-ID: <7797aa370902131920t6010aa06i5f58afbbc3a740a2@mail.gmail.com> Subject: [gentoo-cluster] Re: Iozone on multiple nodes using ssh From: Chuanwen Wu To: Jairo.Cardozo@sun.com Cc: gentoo-cluster@lists.gentoo.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Archives-Salt: 551efcf7-25f3-4637-b7bf-c33f2ffe61ab X-Archives-Hash: 204f9e35a03b230e52611e372fb8836b Hi, Jairo, thanks! On Thu, Feb 5, 2009 at 3:54 AM, wrote: > Chuanwen, > > I was trying to run iozone in cluster mode, and faced the same issue you > are. > > I found the solution. My cluster has two network interfaces, one for admin, > one to connect to the NFS share. I wanted to use jumbo frames to have > better network performance, so I enabled jumbo frames, MTU size was changed > on both interfaces to 9000. iozone uses the admin network to connect the > master and the clients. > > After I changed the MTU size back to 1500 on the admin interface, voila, > iozone worked. For some reason, when the client is trying to get back to > the master, it does not like jumbo frames. I have checked the MTU of the net interface, and it's 1500. I didn't change the default value: # ifconfig | grep MTU UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 -- wcw