Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sources.redhat.com/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Date:	Thu, 13 Mar 2003 21:41:55 -0500
From:	"Pierre A. Humblet" <pierre DOT humblet AT ieee DOT org>
To:	cygwin AT cygwin DOT com
Subject:	Re: cygwin-1.3.21-1, problem with sparse file creation as default
Message-ID:	<20030314024154.GA33739617@hpn5170x>
Mail-Followup-To:	"Pierre A. Humblet" <pierre DOT humblet AT ieee DOT org>,
	cygwin AT cygwin DOT com
References:	<3E70AD52 DOT 744 DOT D4BC055 AT localhost> <000801c2e974$0a0541b0$78d96f83 AT pomello>
Mime-Version:	1.0
In-Reply-To:	<000801c2e974$0a0541b0$78d96f83@pomello>
User-Agent:	Mutt/1.4i

On Thu, Mar 13, 2003 at 03:20:10PM -0000, Max Bowsher wrote:
> 
> We've had no proof of advantages (except in one very restricted corner
> case), and no disproof of disadvantages (i.e. speed penalties).
>
Max,

Running a speed test would be interesting of course, but I point to an 
advantage for most of us: with 32 bit uids the /var/log/lastlog file can 
become enormous. Fortunately (for systems that support sparse files), it 
is sparse. The example below also demonstrates that cp preserves sparseness
by default.

/var/log: cp lastlog lastlog2
/var/log: cat lastlog > lastlog3
/var/log: ls -l lastlog*
-rw-rw-rw-    1 p-humble sw        3055044 Mar 13 11:23 lastlog
-rw-rw-rw-    1 p-humble sw        3055044 Mar 13 12:06 lastlog2
-rw-rw-rw-    1 p-humble sw        3055044 Mar 13 12:07 lastlog3
/var/log: du lastlog*
64      lastlog
64      lastlog2
2880    lastlog3

Pierre


--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/

- Raw text -