コード例 #1
0
  public static double calAlpha(double theta, double dec) {
    if (Math.abs(dec) + theta > 89.9) return 180;

    return (double)
        Math.toDegrees(
            Math.abs(
                Math.atan(
                    Math.sin(Math.toRadians(theta))
                        / Math.sqrt(
                            Math.cos(Math.toRadians(dec - theta))
                                * Math.cos(Math.toRadians(dec + theta))))));
  }
コード例 #2
0
ファイル: Sqrt2.java プロジェクト: Totemika/repoHadoop
 public void map(
     LongWritable key,
     Text value,
     OutputCollector<DoubleWritable, DoubleWritable> output,
     Reporter reporter)
     throws IOException {
   String line = value.toString();
   DoubleWritable clave = new DoubleWritable();
   DoubleWritable valor = new DoubleWritable();
   clave.set(Double.parseDouble(line));
   valor.set(Math.sqrt(Double.parseDouble(line)));
   output.collect(clave, valor);
 }
コード例 #3
0
ファイル: DFSCIOTest.java プロジェクト: RiseOfApes/hadoop
  private static void analyzeResult(FileSystem fs, int testType, long execTime, String resFileName)
      throws IOException {
    Path reduceFile;
    if (testType == TEST_TYPE_WRITE) reduceFile = new Path(WRITE_DIR, "part-00000");
    else reduceFile = new Path(READ_DIR, "part-00000");
    DataInputStream in;
    in = new DataInputStream(fs.open(reduceFile));

    BufferedReader lines;
    lines = new BufferedReader(new InputStreamReader(in));
    long tasks = 0;
    long size = 0;
    long time = 0;
    float rate = 0;
    float sqrate = 0;
    String line;
    while ((line = lines.readLine()) != null) {
      StringTokenizer tokens = new StringTokenizer(line, " \t\n\r\f%");
      String attr = tokens.nextToken();
      if (attr.endsWith(":tasks")) tasks = Long.parseLong(tokens.nextToken());
      else if (attr.endsWith(":size")) size = Long.parseLong(tokens.nextToken());
      else if (attr.endsWith(":time")) time = Long.parseLong(tokens.nextToken());
      else if (attr.endsWith(":rate")) rate = Float.parseFloat(tokens.nextToken());
      else if (attr.endsWith(":sqrate")) sqrate = Float.parseFloat(tokens.nextToken());
    }

    double med = rate / 1000 / tasks;
    double stdDev = Math.sqrt(Math.abs(sqrate / 1000 / tasks - med * med));
    String resultLines[] = {
      "----- DFSCIOTest ----- : "
          + ((testType == TEST_TYPE_WRITE)
              ? "write"
              : (testType == TEST_TYPE_READ) ? "read" : "unknown"),
      "           Date & time: " + new Date(System.currentTimeMillis()),
      "       Number of files: " + tasks,
      "Total MBytes processed: " + size / MEGA,
      "     Throughput mb/sec: " + size * 1000.0 / (time * MEGA),
      "Average IO rate mb/sec: " + med,
      " Std IO rate deviation: " + stdDev,
      "    Test exec time sec: " + (float) execTime / 1000,
      ""
    };

    PrintStream res = new PrintStream(new FileOutputStream(new File(resFileName), true));
    for (int i = 0; i < resultLines.length; i++) {
      LOG.info(resultLines[i]);
      res.println(resultLines[i]);
    }
  }