Xref: utzoo comp.dcom.lans:1068 comp.protocols.tcp-ip:2605
Path: utzoo!mnetor!uunet!oddjob!hao!ames!ll-xn!husc6!hscfvax!mohamed
From: mohamed@hscfvax.harvard.edu (Mohamed_el_Lozy)
Newsgroups: comp.dcom.lans,comp.protocols.tcp-ip
Subject: Re: Time synchronization in a Distributed Environment
Message-ID: <517@hscfvax.harvard.edu>
Date: 25 Feb 88 14:29:36 GMT
References: <2710@druhi.ATT.COM>
Reply-To: mohamed@hscfvax.harvard.edu (Mohamed_el_Lozy)
Followup-To: comp.protocols.tcp-ip
Distribution: comp
Organization: Health Sciences Computing Facility, Harvard University
Lines: 26
Keywords: time synchronization distributed systems
Summary: RFC 956, 957, 958 and ntp-request@trantor.umd.edu

In article <2710@druhi.ATT.COM> aws@druhi.ATT.COM (SteereA) writes:
>  I am looking for articles, references, implementations,
>etc. for solving the problem of keeping N machines within
>a specified time of one another.  I appreciate any and all pointers.

I am directing followup to comp.protocols.tcp-ip, where it would be
more appropriate.  I assume that the machines are networked.

A good start would be in three RFCs written by Dave Mills:
	956	Algorithms for synchronizing network clocks
	957	Experiments in network clock synchronization
	958	Network time protocol (NTP)
They all came out in 1985, and have reasonable references for that time.

A UNIX (BSD only, as I recall) implementation of NTP has been written
at trantor.umd.edu, which also maintains a mailing list.  To get on it
send mail to ntp-request@trantor.umd.edu.

There is also often quite a bit of network time discussion in
comp.protocols.tcp-ip, especially when interesting things like leap
seconds turn up.

BSD4.3 implementations have a timed program, discussed at some length
in the documentation (not available to me right now).

I would very much appreciate some post 1985 references.