def _count_active_servers(self, assignment):
buckets = [True for _ in xrange(len(nodes.NODES))]
active_servers = 0
active_server_list = []
for service in assignment.keys():
inode = assignment[service]
if buckets[inode]:
buckets[inode] = False
active_servers += 1
active_server_list.append(nodes.get_node_name(inode))
return active_servers, active_server_list
