From owner-freebsd-questions@FreeBSD.ORG  Thu Aug 16 13:10:58 2007
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id DD79216A41B
	for <freebsd-questions@freebsd.org>;
	Thu, 16 Aug 2007 13:10:58 +0000 (UTC)
	(envelope-from lists@jnielsen.net)
Received: from ns1.jnielsen.net (ns1.jnielsen.net [69.55.238.237])
	by mx1.freebsd.org (Postfix) with ESMTP id C56BC13C481
	for <freebsd-questions@freebsd.org>;
	Thu, 16 Aug 2007 13:10:58 +0000 (UTC)
	(envelope-from lists@jnielsen.net)
Received: from localhost (jn@ns1 [69.55.238.237]) (authenticated bits=0)
	by ns1.jnielsen.net (8.12.9p2/8.12.9) with ESMTP id l7GDAvc0035602;
	Thu, 16 Aug 2007 09:10:58 -0400 (EDT)
	(envelope-from lists@jnielsen.net)
From: John Nielsen <lists@jnielsen.net>
To: freebsd-questions@freebsd.org, Grant Peel <gpeel@thenetnow.com>
Date: Thu, 16 Aug 2007 09:10:12 -0400
User-Agent: KMail/1.9.7
References: <00b601c7e003$fb1e0200$6501a8c0@GRANT>
In-Reply-To: <00b601c7e003$fb1e0200$6501a8c0@GRANT>
X-Face: #X5#Y*q>F:]zT!DegL3z5Xo'^MN[$8k\[4^3rN~wm=s=Uw(sW}R?3b^*f1Wu*.<=?utf-8?q?of=5F4NrS=0A=09P*M/9CpxDo!D6?=)IY1w<9B1jB;
	tBQf[RU-R<,I)e"$q7N7
MIME-Version: 1.0
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-Id: <200708160910.14095.lists@jnielsen.net>
X-Virus-Scanned: ClamAV version 0.88.4,
	clamav-milter version 0.88.4 on ns1.jnielsen.net
X-Virus-Status: Clean
Cc: 
Subject: Re: Dump + GZIP
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 16 Aug 2007 13:10:58 -0000

On Thursday 16 August 2007, Grant Peel wrote:
> Can I safely pump a filesystem dump through gzip during the dumping
> process?, or di I need to create the dump first then gzip it after?

I do it all the time: dump -f - ... | gzip > date_filesystem.dump.gz
or with bzip2: dump -f - ... | bzip2 > date_filesystem.dump.bz2

> Does zipping the dumps cause any headaches at restore time?

Nope: bzcat date_filesystem.dump.bz2 | restore ... -f -

> (I currently dump 5 servers worth of data to a raid 5 array, and am about
> 20% away from running out of disk space).
>
> Does gzipping a file give a decent compression ratio?

Depends on what you're compressing, but generally yes. bzip2 generally 
compresses better but takes a lot more time, CPU and memory at compression 
time.

JN