def resetDatanode(cls,action):
datanodes = cls.getDatanodes()
Machine.resetNode("datanode", datanodes, action)
def resetJobtracker(cls,action):
jobtracker = MAPRED.getJobTracker().split()
Machine.resetNode("jobtracker", jobtracker, action)
def resetTasktracker(cls,action):
tasktrackers = cls.getTasktrackers()
Machine.resetNode("tasktracker", tasktrackers, action)
def resetNamenode(cls,action):
namenode = HDFS.getNamenode().split()
Machine.resetNode("namenode", namenode, action)
