def METHOD_NAME():
    global avail_nodes, dumps_root_dir, investigation_name
    if len(sys.argv) < 3:
        print('USAGE: python3 {} '.format(sys.argv[0]) +
                '<dumps-root-dir> [<investigation-name>]')
        sys.exit(1)
    dumps_root_dir = sys.argv[1]
    investigation_name = sys.argv[2] or investigation_name
    avail_nodes = [n for n in next(os.walk(dumps_root_dir))[1]]
    if not os.path.exists(os.path.join('.', investigation_name)):
        os.mkdir(investigation_name)
    for node in avail_nodes:
        if not os.path.exists(
                os.path.join('.', investigation_name, node)):
            os.mkdir(os.path.join(investigation_name, node))