[BProc] Re: [bproc]Process IP masking

[Erik A. H. <er...@he...>]

On Thu, Oct 18, 2001 at 10:41:23AM -0700, Shane Walton wrote:
> Can bproc do any magic as to mask the IP of a process
> running on a given node to the IP of the front end
> node?  I guess I am asking, when a process is excuted
> on a remote node, which was originally executed on the
> front-end, will it inherit the IP of the front-end. 
> If it doesn't, does anyone know a way to make a
> cluster look like it has only one IP?

There's no such magic in BProc and deliberately so.  That particular
flavor of magic is pretty difficult to do and would almost certainly
be expensive.  I've avoided doing anything that would cause any kind
of performance hit on your average MPI application.  That basically
means no added over head on any file or socket IO which means handling
it all locally on the node.

If you're worried about what things look like to the outside world,
you can make it look like outgoing connections are coming from the
same place by using the front end as a router and setting up NAT.
Linux virtual server might be useful for the reverse.

- Erik
-- 
Erik Arjan Hendriks          Printed On 100 Percent Recycled Electrons
er...@he...                   Contents may settle during shipment