def star_chunk(cluster, logdir, cmdline, *args):
    """View or set chunkiness of the cluster"""
    if args:
        cluster.chunk_size = int(args[0])
        if len(args) > 1:
            cluster.chunk_delay = float(args[1])
    print('Cluster chunk-factor is %s with a temporal warp of %s' % (
        cluster.chunk_size, cluster.chunk_delay))
