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Goals:
applications with varying number of tasks (task farm)
coupling of applications (client/server)
simple port of PVM applications
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Problems:
static communicator model of MPI-1
start of tasks strongly system dependent
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Solution:
high-level routines to start tasks
connection to new tasks via intercommunicator
additional system dependent infos with MPI_Info
MPI_UNIVERSE_SIZE: indication of number of available
cpus
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Basic mechanisms: