mpj-express

问题 I'm new to parallel programming and I want to do it in java. I am wondering if it is possible to send and receive more complex ojects via MPI. I'm using MPJ express. However whenever I want to send a object I get a ClassCastException. MPI.Init(args); myrank = MPI.COMM_WORLD.Rank(); numprocs = MPI.COMM_WORLD.Size(); Vector<CustomClass> chr = new Vector<CustomClass>(); if (myrank == 0 ) { //am I the master? for (int i = 1; i < numprocs; i++) { MPI.COMM_WORLD.Send(chr, 0, chr.size(), MPI.OBJECT,

问题 i set MPJ_HOME in the environment variable and when i execute mpjboot machines i get this error Error: MPJ_HOME environment variable not set!!! java.lang.Exception: MPJ_HOME environment variable not set!!! at runtime.daemon.MPJDaemon.<init>(MPJDaemon.java:87) at runtime.daemon.MPJDaemon.main(MPJDaemon.java:252) [server] Unable to start MPJ Express daemon 回答1: MPJDaemon class is executed on compute nodes, it listens for the requests from mpirun module (running on head machine) Please make sure

问题 java and mpj express are installed in /opt in compute node. JAVA_HOME , MPJ_HOME and PATH are set already via bashrc. error when running mpjboot machines : bash: java: command not found java is working already in both machines mpjboot: #!/bin/sh if [ $# -ne 1 ]; then echo "Usage: mpjboot <machines_file>"; exit 127 fi java -jar $MPJ_HOME/lib/daemonmanager.jar -boot -m "$@" 回答1: which Linux Distribution are you using? Try placing MPJ_HOME and JAVA_HOME at top of .bashrc. It fixes this problem

问题 I am following these instructions to run MPJ Express on Eclipse. I defined the MPJ_HOME variable and added -jar ${MPJ_HOME}/lib/starter.jar -np 4 to the VM arguments. When I run the program, the following exception is raised: [MPJRun.java]:[MPJRun.java]:MPJ_HOME environment found.. java.lang.Exception: [MPJRun.java]:MPJ_HOME environment found.. at runtime.starter.MPJRun.<init>(MPJRun.java:155) at runtime.starter.MPJRun.main(MPJRun.java:1238) Why is this an exception? What can I do to fix it?

问题 I followed a tutorial from Utube on how to run parallel aplications using MPJ Express in an IDE. I downloaded the latest version of MPJ Express and used Eclipse Indigo. I did include in my project JAR file for MPI. When I tried to compile a simple "hello program," I got this error: Caused by: java.lang.Error: Unresolved compilation problems: The type mpi.MPIException cannot be resolved. It is indirectly referenced from required .class files My code is import mpi.*; public class