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))))));
}
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);
}
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]);
}
}