From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: tuhs-bounces@minnie.tuhs.org
X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on inbox.vuxu.org
X-Spam-Level: 
X-Spam-Status: No, score=-0.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,
	MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no
	version=3.4.1
Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53])
	by inbox.vuxu.org (OpenSMTPD) with ESMTP id 9ad6098c
	for <ml@inbox.vuxu.org>;
	Tue, 19 Jun 2018 11:51:02 +0000 (UTC)
Received: by minnie.tuhs.org (Postfix, from userid 112)
	id 0E9CFA19F8; Tue, 19 Jun 2018 21:51:01 +1000 (AEST)
Received: from minnie.tuhs.org (localhost [127.0.0.1])
	by minnie.tuhs.org (Postfix) with ESMTP id 33D16A19D5;
	Tue, 19 Jun 2018 21:50:32 +1000 (AEST)
Received: by minnie.tuhs.org (Postfix, from userid 112)
 id 99243A19D5; Tue, 19 Jun 2018 21:50:29 +1000 (AEST)
Received: from mail.cs.Dartmouth.EDU (mail.cs.dartmouth.edu [129.170.212.100])
 by minnie.tuhs.org (Postfix) with ESMTPS id 286E2A19D4
 for <tuhs@tuhs.org>; Tue, 19 Jun 2018 21:50:29 +1000 (AEST)
Received: from tahoe.cs.Dartmouth.EDU (tahoe.cs.dartmouth.edu [129.170.212.20])
 by mail.cs.Dartmouth.EDU (8.15.2/8.15.2) with ESMTPS id w5JBoRDt018571
 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO)
 for <tuhs@tuhs.org>; Tue, 19 Jun 2018 07:50:27 -0400
Received: from tahoe.cs.Dartmouth.EDU (localhost.localdomain [127.0.0.1])
 by tahoe.cs.Dartmouth.EDU (8.15.2/8.14.3) with ESMTP id w5JBoR2r045550
 for <tuhs@tuhs.org>; Tue, 19 Jun 2018 07:50:27 -0400
Received: (from doug@localhost)
 by tahoe.cs.Dartmouth.EDU (8.15.2/8.15.2/Submit) id w5JBoR34045549
 for tuhs@tuhs.org; Tue, 19 Jun 2018 07:50:27 -0400
From: Doug McIlroy <doug@cs.dartmouth.edu>
Message-Id: <201806191150.w5JBoR34045549@tahoe.cs.Dartmouth.EDU>
Date: Tue, 19 Jun 2018 07:50:27 -0400
To: tuhs@tuhs.org
User-Agent: Heirloom mailx 12.5 7/5/10
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Subject: Re: [TUHS] core
X-BeenThere: tuhs@minnie.tuhs.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: The Unix Heritage Society mailing list <tuhs.minnie.tuhs.org>
List-Unsubscribe: <https://minnie.tuhs.org/cgi-bin/mailman/options/tuhs>,
 <mailto:tuhs-request@minnie.tuhs.org?subject=unsubscribe>
List-Archive: <http://minnie.tuhs.org/pipermail/tuhs/>
List-Post: <mailto:tuhs@minnie.tuhs.org>
List-Help: <mailto:tuhs-request@minnie.tuhs.org?subject=help>
List-Subscribe: <https://minnie.tuhs.org/cgi-bin/mailman/listinfo/tuhs>,
 <mailto:tuhs-request@minnie.tuhs.org?subject=subscribe>
Errors-To: tuhs-bounces@minnie.tuhs.org
Sender: "TUHS" <tuhs-bounces@minnie.tuhs.org>

> As best I now recall, the concept was that instead of the namespace having a
root at the top, from which you had to allocate downward (and then recurse),
it built _upward_ - if two previously un-connected chunks of graph wanted to
unite in a single system, they allocated a new naming layer on top, in which
each existing system appeared as a constituent.

The Newcastle Connection (aka Unix United) implemented this idea.
Name spaces could be pasted together simply by making .. at the
roots point "up" to a new superdirectory. I do not remember whether
UIDS had to agree across the union (as in NFS) or were mapped (as
in RFS).

Doug