def add_slave(slave)
      RRRSpec.redis.rpush(RRRSpec.make_key(key, 'slave'),
                          slave.key)
    end
def add_slave(slave)
      RRRSpec.redis.rpush(RRRSpec.make_key(key, 'slave'),
                          slave.key)
    end
==========================================================================
 Slaves
 Public: Add a slave