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From: Brian Barrett (brbarret_at_[hidden])
Date: 2006-02-28 13:00:51


On Feb 28, 2006, at 12:17 PM, Emanuel Ziegler wrote:

> Just another question: Is is possible to use a 32 Bit machine as head
> node (without being involved into the computations)? When I try to
> run a
> program using mpirun from the 32 Bit machine I get
> [headnode:32560] [0,0,0] mca_oob_tcp_recv_handler: \
> invalid message type: 0
> and the debug output shows
> [node01:01330] [0,0,1]-[0,0,0] mca_oob_tcp_peer_recv_blocking: \
> recv() failed with errno=104
> which means "Connection reset by peer". In between the 64 Bit machines
> it works fine now.

This is not currently supported. It is something that we are working
to fix for the Open MPI 1.1 release. In the 1.0.x series, we require
that all processes have the same word size and the same endianness.

Brian

-- 
   Brian Barrett
   Open MPI developer
   http://www.open-mpi.org/