Newsgroups: comp.parallel.pvm
From: papadopo@cs.utk.edu (Philip Papadopoulos)
Subject: Re: adding hosts to a virtual machine
Organization: CS Department, University of Tennessee, Knoxville
Date: 16 Jul 1996 14:58:56 -0400
Message-ID: <4sgopgINNp2a@duncan.cs.utk.edu>

In article <4sfusk$it7@whitbeck.ncl.ac.uk> "C.M. Angus" <C.M.Angus@ncl.ac.uk> writes:
>Hi,
>
>I have never actually used pvm and was wondering if it was possible to add a host
>to pvm to be included in an already running job. Or if a host fails for the job to
>continue. Given that the running job is sophisticated enough to deal with these
>eventualities.
>
Yes. You can do this in PVM (user effort required :-)). 
The function pvm_notify will notify you of "events" and send you a 
message. Current events that you can be told about are:
	Task exiting
	Host leaving the virtual machine
	Host entering the virtual machine

If you want to write a fault-tolerant program, it is possible but 
not trivial. If you want to reconfigure a running job to run on hosts as
they are added, you can do this too.  


Cheers,
Phil

