From owner-freebsd-fs@FreeBSD.ORG  Tue Jul  9 08:11:12 2013
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: freebsd-fs@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by hub.freebsd.org (Postfix) with ESMTP id 8AE76E03
 for <freebsd-fs@freebsd.org>; Tue,  9 Jul 2013 08:11:12 +0000 (UTC)
 (envelope-from daniel@digsys.bg)
Received: from smtp-sofia.digsys.bg (smtp-sofia.digsys.bg [193.68.21.123])
 by mx1.freebsd.org (Postfix) with ESMTP id 118301F27
 for <freebsd-fs@freebsd.org>; Tue,  9 Jul 2013 08:11:11 +0000 (UTC)
Received: from dcave.digsys.bg (dcave.digsys.bg [193.68.6.1])
 (authenticated bits=0)
 by smtp-sofia.digsys.bg (8.14.6/8.14.6) with ESMTP id r698B1sN074040
 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO)
 for <freebsd-fs@freebsd.org>; Tue, 9 Jul 2013 11:11:02 +0300 (EEST)
 (envelope-from daniel@digsys.bg)
Message-ID: <51DBC595.4020407@digsys.bg>
Date: Tue, 09 Jul 2013 11:11:01 +0300
From: Daniel Kalchev <daniel@digsys.bg>
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64;
 rv:17.0) Gecko/20130627 Thunderbird/17.0.7
MIME-Version: 1.0
To: freebsd-fs@freebsd.org
Subject: Re: Terrible NFS4 performance: FreeBSD 9.1 + ZFS + AWS EC2
References: <87y59i0yni.wl%berend@pobox.com>
 <580122426.2916694.1373242759482.JavaMail.root@uoguelph.ca>
 <87a9lwyy16.wl%berend@pobox.com>
In-Reply-To: <87a9lwyy16.wl%berend@pobox.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 09 Jul 2013 08:11:12 -0000


On 09.07.13 10:48, Berend de Boer wrote:
> OK, completely disregard my previous email. I actually was testing
> against a server in a different data centre, didn't think it would
> matter too much, but clearly it does (ping times 2-3 times higher).
>


Could you please actually post a diagram of your setup, with all the 
components, including the "low spec Linux server". Do not forget the RTT 
(ping) between these hosts. If you have made any network tuning too.

Networking protocols like NFS are heavily influenced by factors like 
RTT.  An "underpowered" box that is "nearby" (has lover RTT) usually 
performs much better than a "powerful box" with larger RTT and other 
network bottlenecks.

Unfortunately, AWS is far from perfect hardware emulation and there 
might be other layers that intervene with the NFS protocol.

Daniel