rename master to tracker, to emphasie rabit is p2p in computing

src/rabit_tracker.py

@@ -112,7 +112,7 @@ class SlaveEntry:
             self.wait_accept = len(badset) - len(conset)
             return rmset
     
-class Master:
+class Tracker:
     def __init__(self, port = 9000, port_end = 9999):
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         for port in range(port, port_end):
@@ -172,7 +172,7 @@ def mpi_submit(nslave, args):
     return subprocess.check_call(cmd, shell = True)
     
 def submit(nslave, args, fun_submit = mpi_submit):
-    master = Master()
+    master = Tracker()
     submit_thread = Thread(target = fun_submit, args = (nslave, args + master.slave_args()))
     submit_thread.start()
     master.accept_slaves(nslave)

submit_hadoop.py

@@ -8,7 +8,7 @@ import os
 import time
 import subprocess
 sys.path.append('./src/')
-import rabit_master as master
+import rabit_tracker as tracker
 
 parser = argparse.ArgumentParser(description='Hadoop Streaming submission script')
 parser.add_argument('-s', '--nslaves', required=True, type=int)
@@ -28,5 +28,5 @@ def hadoop_streaming(nslaves, slave_args):
   subprocess.check_call(cmd, shell = True)
 
 start = time.time()
-master.submit(args.nslaves, [], fun_submit= hadoop_streaming)
+tracker.submit(args.nslaves, [], fun_submit= hadoop_streaming)
 print 'All run took %s' % (time.time() - start)

submit_mpi.py

@@ -9,7 +9,7 @@ import subprocess
 # import the tcp_master.py
 # add path to sync
 sys.path.append(os.path.dirname(__file__)+'/src/')
-import rabit_master as master
+import rabit_tracker as tracker
 
 #
 #  Note: this submit script is only used for example purpose
@@ -33,4 +33,4 @@ if __name__ == '__main__':
         print 'Usage: <nslave> <cmd>'
         exit(0)        
     # call submit, with nslave, the commands to run each job and submit function
-    master.submit(int(sys.argv[1]), sys.argv[2:], fun_submit= mpi_submit)
+    tracker.submit(int(sys.argv[1]), sys.argv[2:], fun_submit= mpi_submit)