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From: ag@elgar.UUCP (Keith Gabryelski)
Newsgroups: comp.unix.wizards
Subject: Re: Process restart.
Keywords: Fork, Process, migration, remote, a.out, core
Message-ID: <18@elgar.UUCP>
Date: 11 Nov 88 19:19:14 GMT
References: <16@elgar.UUCP> <8831@smoke.BRL.MIL> <17@elgar.UUCP> <8857@smoke.BRL.MIL>
Reply-To: ag@elgar.UUCP (Keith Gabryelski)
Organization: Elgar Corporation, San Diego, CA
Lines: 22

In article <8857@smoke.BRL.MIL> gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>) writes:
>Only rather simple-minded uses of processes can
>be properly restarted from snapshots.

Snapshots are not the only mean of process restart, but they are the
most likely for what I was thinking.

>To take a specific example, I defy you to restart a snapshot
>of the "layers" program using any general-purpose mechanism.

I doubt a shell is something some one would want to restart (although
migrate is a different matter).  You would probably want some of the
proceses that are running under the shell, though.

Long running procesess that don't have any means of shutdown/restart
built into them are what I am thinking of.

Let's say we have this process computing prime numbers (or some other
simple case) and the system needs to be shutdown because of some fatal
error.  Can a snapshot be done?
-- 
ag@elgar.CTS.COM         Keith Gabryelski          ...!{ucsd, jack}!elgar!ag