From owner-freebsd-fs@FreeBSD.ORG  Thu Dec  1 10:44:17 2011
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: freebsd-fs@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 721001065673
	for <freebsd-fs@freebsd.org>; Thu,  1 Dec 2011 10:44:17 +0000 (UTC)
	(envelope-from kraduk@gmail.com)
Received: from mail-yx0-f182.google.com (mail-yx0-f182.google.com
	[209.85.213.182])
	by mx1.freebsd.org (Postfix) with ESMTP id 199E18FC18
	for <freebsd-fs@freebsd.org>; Thu,  1 Dec 2011 10:44:16 +0000 (UTC)
Received: by yenq9 with SMTP id q9so2424129yen.13
	for <freebsd-fs@freebsd.org>; Thu, 01 Dec 2011 02:44:16 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=mime-version:in-reply-to:references:date:message-id:subject:from:to
	:cc:content-type;
	bh=2viTJKtsN3j+G/+Igln7Ptp8jLhTosc/Q6MGxE4Lu0c=;
	b=DdvKa6XY40PKUb5vtXYffDZo1zZ8T2FNycnIjOm43b/X08B4f/y0EUoy7tw5rp7Yq2
	SD9HzW7+1ocOlWb2Dddg4oVecdRJ7MXCcEiJ6qktj8VueK7MWJU23KQ0QyNgon1jLQnl
	iRWPN/qBFOcvZJrQ5ks5xtN5CYOtCx8ksiAwI=
MIME-Version: 1.0
Received: by 10.236.155.36 with SMTP id i24mr10361237yhk.43.1322734818286;
	Thu, 01 Dec 2011 02:20:18 -0800 (PST)
Received: by 10.236.95.41 with HTTP; Thu, 1 Dec 2011 02:20:18 -0800 (PST)
In-Reply-To: <CAEUA181wUZC-KjVwcm=tTY0DoBLzrNAuBF3aFimSbLB=xht0jw@mail.gmail.com>
References: <CAEUA181wUZC-KjVwcm=tTY0DoBLzrNAuBF3aFimSbLB=xht0jw@mail.gmail.com>
Date: Thu, 1 Dec 2011 10:20:18 +0000
Message-ID: <CALfReycy29VdegrmDrBJ7U3Mjt7+OxUvN7hxOKHOqSX4jD5_kg@mail.gmail.com>
From: krad <kraduk@gmail.com>
To: Techie <techchavez@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
X-Content-Filtered-By: Mailman/MimeDel 2.1.5
Cc: freebsd-fs@freebsd.org
Subject: Re: ZFS dedup and replication
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/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: Thu, 01 Dec 2011 10:44:17 -0000

On 28 November 2011 23:01, Techie <techchavez@gmail.com> wrote:

> Hi all,
>
> Is there any plans to implement sharing of the ZFS DDT Dedup table or
> to make ZFS aware of the destination duplicate blocks on a remote
> system?
>
> >From how I understand it, the zfs send/recv stream does not know about
> the duplicated blocks on the receiving side when using zfs send -D -i
> to sendonly incremental changes.
>
> So take for example I have an application that I backup each night to
> a ZFS file system. I want to replicate this every night to my remote
> site. Each night that I back up I create a tar file on the ZFS data
> file system. When I go to send an incremental stream it sends the
> entire tar file to the destination even though over 90% of those
> blocks already exist at the destination.. Is there any plans to make
> ZFS aware of what exists already at the destination site to eliminate
> the need to send duplicate blocks over the wire? zfs send -D I believe
> only eliminates the duplicate blocks within the stream.
>
> Perhaps I am wrong..
>
>
> Thanks
> Jimmy
> _______________________________________________
> freebsd-fs@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-fs
> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"
>


Why tar up the stuff? Just do a zfs snap and then you bypass the whole
issue?