def _get_job_keys(job_id):
    """
    Each job is comprised of several keys in Redis. Given a job ID, return
    all of the keys that form the job.

    :param str job_id: A job's UUID4 ID string.
    :rtype: dict
    :returns: A dict with the given job's key names in Redis.
    """

    return {
        'all_urls_key': '%s-all_urls_key' % job_id,
        'crawls_pending_key': '%s-crawls_pending' % job_id,
        'crawls_completed_key': '%s-crawls_completed' % job_id,
        'images_key': '%s-images' % job_id,
    }