From owner-freebsd-stable@FreeBSD.ORG  Sat Oct  2 02:58:47 2010
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 08634106564A
	for <freebsd-stable@freebsd.org>; Sat,  2 Oct 2010 02:58:46 +0000 (UTC)
	(envelope-from jamesbrandongooch@gmail.com)
Received: from mail-ww0-f50.google.com (mail-ww0-f50.google.com [74.125.82.50])
	by mx1.freebsd.org (Postfix) with ESMTP id 569AF8FC12
	for <freebsd-stable@freebsd.org>; Sat,  2 Oct 2010 02:58:45 +0000 (UTC)
Received: by wwb17 with SMTP id 17so4846335wwb.31
	for <freebsd-stable@freebsd.org>; Fri, 01 Oct 2010 19:58:45 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:mime-version:received:received:in-reply-to
	:references:date:message-id:subject:from:to:cc:content-type
	:content-transfer-encoding;
	bh=BppFsgJFemV+PdKx6XgHtVK2PQVePkDmXWzKd6ySCYg=;
	b=oNQf4sYR6JrK6OxCwBjV+sNm+OCMMeI+0Uk/wH96ct0us34wQEdVDC6lfh1ZhyC/2R
	SFV1agR1X4QkUNBU2B0qqHw4YuzdJ1AnpRWMj9LXiOL14l9kU0we8xXYwKNBfCucAArd
	hiUBcVI8ofdHt/SJYTJYJPHkWCWP2moZYl4Bk=
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=LRBy0pMJL6cep05z5B4d309gqDa/mjXZQsSMrqvQCJ0LLJ5cWUL9mLMJxCmTUOCZj4
	fHDxbHJ3sKn7KjHkaZV0uUamgmz8JO3BqaVvvB6FBQihs6RZ76dsH0iAel1u4FXbivEH
	2PAhNoR8aLkLF3W66tGCxbNPUPJarKecHuzvA=
MIME-Version: 1.0
Received: by 10.216.23.206 with SMTP id v56mr2798831wev.67.1285986684347; Fri,
	01 Oct 2010 19:31:24 -0700 (PDT)
Received: by 10.216.133.133 with HTTP; Fri, 1 Oct 2010 19:31:24 -0700 (PDT)
In-Reply-To: <AANLkTi=xnOmRXYgr8csy-tTa-GK+3V4Ty2ze0fruPQb4@mail.gmail.com>
References: <a263c3beaeb0fa3acd82650775e31ee3.squirrel@nyi.unixathome.org>
	<45cfd27021fb93f9b0877a1596089776.squirrel@nyi.unixathome.org>
	<AANLkTik0aTDDSNRUBvfX5sMfhW+-nfSV9Q89v+eJo0ov@mail.gmail.com>
	<4C511EF8-591C-4BB9-B7AA-30D5C3DDC0FF@langille.org>
	<AANLkTinyHZ1r39AYrV_Wwc2H3B=xMv3vbeDLY2Gc+kez@mail.gmail.com>
	<4CA68BBD.6060601@langille.org>
	<AANLkTi=xnOmRXYgr8csy-tTa-GK+3V4Ty2ze0fruPQb4@mail.gmail.com>
Date: Fri, 1 Oct 2010 21:31:24 -0500
Message-ID: <AANLkTimtpVcXsd2SyhQDcedrk_PAkxjiJwtT+fbuEMO3@mail.gmail.com>
From: Brandon Gooch <jamesbrandongooch@gmail.com>
To: Artem Belevich <fbsdlist@src.cx>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Cc: freebsd-stable <freebsd-stable@freebsd.org>,
	Dan Langille <dan@langille.org>
Subject: Re: zfs send/receive: is this slow?
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 02 Oct 2010 02:58:47 -0000

On Fri, Oct 1, 2010 at 8:43 PM, Artem Belevich <fbsdlist@src.cx> wrote:
>> As soon as I opened this email I knew what it would say.
>>
>>
>> # time zfs send storage/bacula@transfer | mbuffer | zfs receive
>> storage/compressed/bacula-mbuffer
>> in @ =A0197 MB/s, out @ =A0205 MB/s, 1749 MB total, buffer =A0 0% full
> ...
>> Big difference. =A0:)
>
> I'm glad it helped.
>
> Does anyone know why sending/receiving stuff via loopback is so much
> slower compared to pipe?

This may shed some light on that topic:

http://lists.freebsd.org/pipermail/freebsd-current/2010-September/019877.ht=
ml