distributed computing implementations

[Robin Becker]

In article <m37k9y2l08.fsf at mira.informatik.hu-berlin.de>, Martin v.
Löwis <martin at v.loewis.de> writes
.....
>In CORBA, you need to keep open all connections from which you expect
>a response. So if your allocated socket descriptor pool is exhausted,
>you first close those connections that have no outstanding requests.
>If that is still insufficient, you also close the socket on which you
>have been waiting for a response longest, and tell the application
>that this connection has timed out.
>
>Regards,
>Martin
so how do master slave implementations handle thousands of slaves? If
the master is really a 'master' and not a SETI type server it would seem
that these resource limits might play a part. How do GRID systems work
this?
-- 
Robin Becker