From owner-freebsd-hackers@FreeBSD.ORG  Mon Oct  8 06:38:44 2012
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 5099E106566B
	for <freebsd-hackers@freebsd.org>; Mon,  8 Oct 2012 06:38:44 +0000 (UTC)
	(envelope-from wojtek@wojtek.tensor.gdynia.pl)
Received: from wojtek.tensor.gdynia.pl (wojtek.tensor.gdynia.pl [89.206.35.99])
	by mx1.freebsd.org (Postfix) with ESMTP id A56528FC0A
	for <freebsd-hackers@freebsd.org>; Mon,  8 Oct 2012 06:38:43 +0000 (UTC)
Received: from wojtek.tensor.gdynia.pl (localhost [127.0.0.1])
	by wojtek.tensor.gdynia.pl (8.14.5/8.14.5) with ESMTP id q986cY0E003668;
	Mon, 8 Oct 2012 08:38:34 +0200 (CEST)
	(envelope-from wojtek@wojtek.tensor.gdynia.pl)
Received: from localhost (wojtek@localhost)
	by wojtek.tensor.gdynia.pl (8.14.5/8.14.5/Submit) with ESMTP id
	q986cYpm003665; Mon, 8 Oct 2012 08:38:34 +0200 (CEST)
	(envelope-from wojtek@wojtek.tensor.gdynia.pl)
Date: Mon, 8 Oct 2012 08:38:33 +0200 (CEST)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Tim Kientzle <tim@kientzle.com>
In-Reply-To: <324B736D-8961-4E44-A212-2ECF3E60F2A0@kientzle.com>
Message-ID: <alpine.BSF.2.00.1210080838170.3664@wojtek.tensor.gdynia.pl>
References: <5069C9FC.6020400@brandonfa.lk>
	<alpine.BSF.2.00.1210071859430.15957@wojtek.tensor.gdynia.pl>
	<324B736D-8961-4E44-A212-2ECF3E60F2A0@kientzle.com>
User-Agent: Alpine 2.00 (BSF 1167 2008-08-23)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.2.7
	(wojtek.tensor.gdynia.pl [127.0.0.1]);
	Mon, 08 Oct 2012 08:38:34 +0200 (CEST)
Cc: freebsd-hackers@freebsd.org, Brandon Falk <bfalk_bsd@brandonfa.lk>
Subject: Re: SMP Version of tar
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 08 Oct 2012 06:38:44 -0000

>> gzip cannot - it is single stream.
>
> gunzip commutes with cat, so gzip
> compression can be multi-threaded
> by compressing separate blocks and
> concatenating the result.

right. but resulting file format must be different.