def expire(sec)
      RRRSpec.redis.expire(key, sec)
      RRRSpec.redis.expire(RRRSpec.make_key(key, 'trial'), sec)
      RRRSpec.redis.expire(RRRSpec.make_key(key, 'log'), sec)
      RRRSpec.redis.expire(RRRSpec.make_key(key, 'heartbeat'), sec)
    end
def expire(sec)
      RRRSpec.redis.expire(key, sec)
      RRRSpec.redis.expire(RRRSpec.make_key(key, 'trial'), sec)
      RRRSpec.redis.expire(RRRSpec.make_key(key, 'log'), sec)
      RRRSpec.redis.expire(RRRSpec.make_key(key, 'heartbeat'), sec)
    end
==========================================================================
 Persistence