From owner-freebsd-isp@FreeBSD.ORG Mon Mar 31 09:43:23 2003 Return-Path: Delivered-To: freebsd-isp@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8465437B401 for ; Mon, 31 Mar 2003 09:43:23 -0800 (PST) Received: from misery.sdf.com (misery.sdf.com [207.200.153.226]) by mx1.FreeBSD.org (Postfix) with ESMTP id 32E1B43FB1 for ; Mon, 31 Mar 2003 09:43:21 -0800 (PST) (envelope-from tom@sdf.com) Received: from tom (helo=localhost) by misery.sdf.com with local-esmtp (Exim 2.12 #1) id 1901o4-0000cC-00; Mon, 31 Mar 2003 08:06:44 -0800 Date: Mon, 31 Mar 2003 08:06:31 -0800 (PST) From: Tom Samplonius To: Bill Vermillion In-Reply-To: <20030331172207.GA21589@wjv.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: freebsd-isp@freebsd.org Subject: Re: ntp / ntpdate X-BeenThere: freebsd-isp@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Internet Services Providers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 31 Mar 2003 17:43:24 -0000 On Mon, 31 Mar 2003, Bill Vermillion wrote: > Ashes to ashes, and DOS to DOS Arie J. Gerszt was heard to say > on or about Mon, Mar 31, 2003 at 19:06 : > > > Hi List > > > How do you update your servers with ntp? I have seen ntpd, > > ntpdate, xntpd and are a bit confused. Aside that, ntpdate > > never seems to work ( get the offset, but the time stays the > > same, securelevel -2, done as root). > > Read man 8 init . You will see that if secure level is set above > 1 that time changes are restricted to less than one second. > > You just may need to run your ntp programs more often to ensure you > stay within that time window. Or just use ntpd, which will do this continuously. ntpdate is deprecated so don't use that. xntpd and ntpd are basically the same thing. > I run my hourly and normally get only about .2 or .3 second offset. > iNTEL based HW clocks are not known for long time stability. Isn't it a software clock though? gettimeofday() is described as using a "virtual" clock. > Bill > -- > Bill Vermillion - bv @ wjv . com > _______________________________________________ > freebsd-isp@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-isp > To unsubscribe, send any mail to "freebsd-isp-unsubscribe@freebsd.org" > > Tom