From: Elly Molendijk <webmaster@hoise.com>
Newsgroups: comp.parallel.pvm
Subject: Re: Scheduler
Date: Wed, 17 Mar 1999 09:55:33 -0800
Organization: UUNET-NL (http://www.nl.uu.net)
Message-Id: <36EFEC94.251D4A19@hoise.com>
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Xref: ukc comp.parallel.pvm:8133


Anders Jorgensen wrote:

> Dear  PVMers,
>         I am in need of a PVM resource manager that can do fault-tolerant
> scheduling. The scheduler will receive a PVM packet from the main
> program, and will be responsible for the processing of the data and
> return of results to the main program.
>
> 1) The scheduler keeps a list of all packets that have not yet been
> processed. Or perhaps optionally a "receipt" so that it can go and
> re-request the packet from the main program should it need it.
>
> 2) When a host goes down, packets that were being processed on that host
> must be resubmitted to other hosts.
>
> 3) When the main program sends a certain message (a block) to the
> scheduler, the scheduler must get all packets processed as quickly as
> possible, by resubmitting not-yet-completed packets to hosts as they
> free up.
>
> 4) Scheduler must also on its own try to re-attach hosts that drop off
> the network, so that during a long computation the network doesn't keep
> shrinking.
>
> 5) It would be nice if the scheduler could add and delete hosts based on
> time of day (to remove certain peoples machines from the VM during
> working hours).
>
> I am thinking of writing this piece of code for a project I'm working
> on, but I thought I would check first whether anyone else has written
> something that does some or most of the functions I mentioned.
>                            ----anders

  Dear Anders,

This looks like the software we are developing within the Dynamite project.

Dynamite delivers automatic work-load balancing of PVM  tasks in workstation
cluster environments with dynamically  changing load to applications.
Dynamite monitors the load on  the workstation cluster and, when necessary,
dynamically  redistributes tasks again to more efficiently use the hardware
available.

We expect to have a working version very soon.

Please check-out the web site for more info:

http://www.genias.nl/dynamite


Best regards,

Ad Emmen

emmen@genias.nl