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From: scc@cl.cam.ac.uk (Stephen Crawley)
Newsgroups: comp.unix.wizards
Subject: Re: rlogin in background strangeness.
Message-ID: <1064@jenny.cl.cam.ac.uk>
Date: Wed, 23-Sep-87 20:05:07 EDT
Article-I.D.: jenny.1064
Posted: Wed Sep 23 20:05:07 1987
Date-Received: Tue, 6-Oct-87 06:42:53 EDT
References: <2850@phri.UUCP> <7997@mimsy.UUCP> <872@mcgill-vision.UUCP> <424@hqda-ai.UUCP>
Reply-To: scc@cl.cam.ac.uk (Stephen Crawley)
Organization: U of Cambridge Comp Lab, UK
Lines: 23

In article <424@hqda-ai.UUCP> merlin@hqda-ai.UUCP (David S. Hayes) writes:
...
>2.  There is a system with the file system in memory, sort of.  In
>the Xerox lisp machines, there is no regular file system.  There
>are only "objects", which are memory-resident.  The system saves
>"worlds" on the disk (in addition to VM paging space).  A world is
>merely a copy of the virtual memory space.

Sorry Dave, but you are only partly right.  A Xerox Lisp machine is
normally configured to have a conventional file system on the local
disc (your LispFiles volume ...).  In addition, files can be stored 
on a remote XNS fileserver.  

Though a "world" (actually a "sysout") may be saved to disc and used
like a file system, users generally use a real filesystem as well.  The
problem with using a sysout as your only filesystem is that when Lisp
falls over or someone trips over the power cord, you may be left with a
badly corrupted sysout, and no way to scavenge it.  This is not my
idea of what a file system ought to be like.

[What has this to do with rlogin?]

-- Steve