From owner-freebsd-fs@freebsd.org Thu Apr 5 17:16:03 2018 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id AA969F94086 for ; Thu, 5 Apr 2018 17:16:03 +0000 (UTC) (envelope-from mike@sentex.net) Received: from smarthost2.sentex.ca (smarthost2.sentex.ca [IPv6:2607:f3e0:80:80::2]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client CN "smarthost.sentex.ca", Issuer "smarthost.sentex.ca" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 515D586CDD for ; Thu, 5 Apr 2018 17:16:03 +0000 (UTC) (envelope-from mike@sentex.net) Received: from lava.sentex.ca (lava.sentex.ca [IPv6:2607:f3e0:0:5::11]) by smarthost2.sentex.ca (8.15.2/8.15.2) with ESMTPS id w35HG2JR098766 (version=TLSv1 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO) for ; Thu, 5 Apr 2018 13:16:02 -0400 (EDT) (envelope-from mike@sentex.net) Received: from [192.168.43.26] (saphire3.sentex.net [192.168.43.26]) by lava.sentex.ca (8.15.2/8.15.2) with ESMTP id w35HG0ca021420; Thu, 5 Apr 2018 13:16:01 -0400 (EDT) (envelope-from mike@sentex.net) Subject: Re: Linux NFS client and FreeBSD server strangeness To: Ben RUBSON , "freebsd-fs@freebsd.org" References: <369fab06-6213-ba87-cc66-c9829e8a76a0@sentex.net> From: Mike Tancsa Organization: Sentex Communications Message-ID: <938022c7-efe0-7ba2-3c71-9036f65ce06e@sentex.net> Date: Thu, 5 Apr 2018 13:16:01 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.78 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Apr 2018 17:16:03 -0000 On 4/5/2018 12:29 PM, Ben RUBSON wrote: > On 04 Apr 2018 20:27, Mike Tancsa wrote: > >> Note, doing something like >> >> dd if=/dev/zero of=/backup/test.bin bs=4096 count=5000000 > > Note that this test may not be really relevant if you have ZFS > compression enabled. hehe, the first time I did this I thought gstat was broken since the disk was doing next to nothing :) However, I did the same sort of tests creating a number of large files from /dev/urandom > >> I too am using 9000 for the MTU. > > Did you try to use smaller MTU ? Yes, I noticed the same behaviour on igb nics at a gig and normal 1500 MTU ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 x203 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada