Examples with Parameters org.apache.hadoop.examples.pi.DistSum.Parameters used on opensource projects

Example 1 with Parameters

use of org.apache.hadoop.examples.pi.DistSum.Parameters in project hadoop by apache.

the class DistBbp method run.

/** {@inheritDoc} */
public int run(String[] args) throws Exception {
    //parse arguments
    if (args.length != DistSum.Parameters.COUNT + 1)
        return Util.printUsage(args, getClass().getName() + " <b> " + Parameters.LIST + "\n  <b> The number of bits to skip, i.e. compute the (b+1)th position." + Parameters.DESCRIPTION);
    int i = 0;
    final long b = Util.string2long(args[i++]);
    final DistSum.Parameters parameters = DistSum.Parameters.parse(args, i);
    if (b < 0)
        throw new IllegalArgumentException("b = " + b + " < 0");
    Util.printBitSkipped(b);
    Util.out.println(parameters);
    Util.out.println();
    //initialize sums
    final DistSum distsum = new DistSum();
    distsum.setConf(getConf());
    distsum.setParameters(parameters);
    final boolean isVerbose = getConf().getBoolean(Parser.VERBOSE_PROPERTY, false);
    final Map<Parameter, List<TaskResult>> existings = new Parser(isVerbose).parse(parameters.localDir.getPath(), null);
    Parser.combine(existings);
    for (List<TaskResult> tr : existings.values()) Collections.sort(tr);
    Util.out.println();
    final Map<Bellard.Parameter, Bellard.Sum> sums = Bellard.getSums(b, parameters.nJobs, existings);
    Util.out.println();
    //execute the computations
    execute(distsum, sums);
    //compute Pi from the sums 
    final double pi = Bellard.computePi(b, sums);
    Util.printBitSkipped(b);
    Util.out.println(Util.pi2string(pi, Bellard.bit2terms(b)));
    return 0;
}