<DIV> </DIV>
<DIV>Hi,</DIV>
<DIV> I'd like to know some details about mpich in a cluster:</DIV>
<DIV> </DIV>
<DIV>1.Is udp or tcp used to communicate when using mpi_send and mpi_recv?</DIV>
<DIV>2.I guess when a mpi programm is run by "mpirun -np process-number mpiprogramme",the mpiprogramme is sent to other computers to run.</DIV>
<DIV>Is this right?</DIV>
<DIV>3.What does mpi_init do?</DIV>
<DIV>4.When using mpi_comm_size,how to get the size?I guess there are two ways:</DIV>
<DIV>the first is getting from "mpirun -np process-numbler mpiprogramme";the second is after judging all the computers in the file "hostlist" is alive or not. Which is right?</DIV>
<DIV>4.And when using mpi_comm_rank,how to get the rank of every computer?</DIV>
<DIV> </DIV>
<DIV>Any help will be greatly appreciated!Many thanks!</DIV>
<DIV> </DIV>
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