From owner-freebsd-questions@FreeBSD.ORG  Fri Dec 21 17:15:12 2007
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 8325A16A420
	for <questions@freebsd.org>; Fri, 21 Dec 2007 17:15:12 +0000 (UTC)
	(envelope-from
	SRS0=04527191878c7d9dce7039eb1c1e2f91e0593f8b=556=es.net=webster@es.net)
Received: from postal1.es.net (postal1.es.net [IPv6:2001:400:14:3::6])
	by mx1.freebsd.org (Postfix) with ESMTP id 0059513C4CE
	for <questions@freebsd.org>; Fri, 21 Dec 2007 17:15:11 +0000 (UTC)
	(envelope-from
	SRS0=04527191878c7d9dce7039eb1c1e2f91e0593f8b=556=es.net=webster@es.net)
Received: from jw-laptop.dhcp.lbnl.us (jw-laptop.dhcp.lbnl.us [198.128.26.45])
	by postal1.es.net (Postal Node 1) with ASMTP (SSL) id ADK27511;
	Fri, 21 Dec 2007 09:15:11 -0800
Date: Fri, 21 Dec 2007 09:15:10 -0800
From: John Webster <jwebster@es.net>
To: Bill Moran <wmoran@potentialtech.com>
Message-ID: <7BEE288E7C218E96DB9E8AA0@jw-laptop.dhcp.lbnl.us>
In-Reply-To: <20071221112303.19619c39.wmoran@potentialtech.com>
References: <20071218165521.GA37529@bewilderbeast.blackhelicopters.org>	<343753.78466.qm@web44811.mail.sp1.yahoo.com>
	<20071221112303.19619c39.wmoran@potentialtech.com>
X-Mailer: Mulberry/4.0.7 (Mac OS X)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
X-Sender-IP: 198.128.26.45
X-Sender-Domain: es.net
X-Recipent: <wmoran@potentialtech.com>; <sh1nny_kn1ght@yahoo.com>;
	<questions@freebsd.org>; <mwlucas@blackhelicopters.org>; 
X-Sender: <webster@es.net>
X-To_Name: Bill Moran
X-To_Domain: potentialtech.com
X-To: Bill Moran <wmoran@potentialtech.com>
X-To_Email: wmoran@potentialtech.com
X-To_Alias: wmoran
Cc: questions@freebsd.org, "Michael W. Lucas" <mwlucas@blackhelicopters.org>,
	shinny knight <sh1nny_kn1ght@yahoo.com>
Subject: Re: timekeeping on jail servers
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: Fri, 21 Dec 2007 17:15:12 -0000



--On December 21, 2007 11:23:03 AM -0500 Bill Moran <wmoran@potentialtech.com> wrote:

> In response to shinny knight <sh1nny_kn1ght@yahoo.com>:
> 
> The reason that is not recommended is that it results in sudden steps
> of the clock.  Occasionally, these steps go backwards.  Software that
> is very sensitive to time changes (make processes, database servers,
> anything doing calculations WRT time) can break, crash, or work
> inaccurately.
> 


ntpdate -B should slew the time slowly.  (According to the manpage.)


Happy Holidays!