[MPICH] Intercommunicator limits

[Yoder, Jeffrey - SSD]

We have an architecture where we have a single process (A), with
multiple send threads, that is parsing a data file and parcelling it
out, using a load-balancing scheme, to n different processing nodes (B1
- Bn).  These B nodes each also have a dedicated receive thread
associated to the A node by means of an intercommunicator.  A similar
setup is used on the backend where the B nodes have dedicated send
threads all tied via intercommunicators to receive threads in node C
where the processed data is all collected and put into our output
format.

 

Our questions are:

1)    Is there a limit to the number of intercommunicators you can have
and, if so, are we going over that limit if we have 24 B nodes

2)       Would a single machine (our cluster is down at the moment) be
able to handle all the MPI communications for this system (for testing
purposes only, until our cluster is back up)?

 

 

 

 

Jeff Yoder
ITT Industries Space Systems LLC
Software Engineering
(260)451-6508

jeffrey.yoder at itt.com <mailto:jeffrey.yoder at itt.com> 

 

The most likely way for the world to be destroyed, most experts agree,

is by accident. That's where we come in; we're computer professionals.

We cause accidents. - Nathaniel Borenstein

 

 

 


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