def schedule_couchbase (self):

        self.node_list= []
        self.trace_node_list = []

        #update node list from controller
        controller.update_node_list()

        nodes = nodelist.get_node_list()
        #Server hanging after a few days could be a possible shelve problem??

        for name in nodes:
            self.node_list.append(couchbasecollect(name, port = util.RD_PORT, ip= name)) # docid is the same as ip, type = node (default)
            self.trace_node_list.append(couchbasecollect(str(name+'-trace'), port = '8000', ip=name, type='trace-route' )) # docid wouldbe "ip-trace-timestamp", type = trace-route

        self.log.info("Number of Nodes: %d" %len(nodes) )
	
        for i in range(3):
            t1= parallelcollect.Parallel_collect(self.q)
            t1.daemon=True
            t1.start()
            t2= parallelcollect.Parallel_collect_synthesized(self.node_ip6q)
            t2.daemon= True
            t2.start()
            #Add thread to collect network trace info
            t3 = parallelcollect.Parallel_collect_trace(self.trace_node)
            t3.daemon = True
            t3.start()


        while(1):

            try:
                for node in self.node_list:
                    self.q.put(node)

                for nodeip6 in nodes:
                    self.node_ip6q.put(nodeip6)

                for node in self.trace_node_list:
                    self.trace_node.put(node)

                self.log.info("Waiting for Collect Queue!!!")
                self.q.join()
                self.log.info("Waiting for synthesized queue!!!")
                self.node_ip6q.join()
                self.log.info("Waiting for trace queue!!!")
                self.trace_node.join()
                self.log.info("Done!! Sleeping until next schedule!!")

            except KeyboardInterrupt:
                sys.exit(1)

            time.sleep(self.time_period)
            self.log.info("---------------------------------------------")
            self.log.info("Scheduling next run")
            self.log.info("---------------------------------------------")
def cache_nodes_list():
    constants.nodes = nodelist.get_node_list()