def main():
global numReplicate
ns = NameServer(numReplicate)
ds1 = DataServer("node1")
ds2 = DataServer("node2")
ds3 = DataServer("node3")
ds4 = DataServer("node4")
ns.add(ds1)
ns.add(ds2)
ns.add(ds3)
ns.add(ds4)
ds1.start()
ds2.start()
ds3.start()
ds4.start()
# print("===")
ns.operator()
'''
print("?????")
ds1.join()
ds2.join()
ds3.join()
ds4.join()
'''
return 0
