def save_tracker_state(hash, state_ttl=@state_ttl)
      @redis.hmset(this_process_tracker_state_key, *hash.to_a.flatten)
      @redis.expireat(this_process_tracker_state_key, (hash[:state_as_of] + state_ttl).to_i)
    end
def save_tracker_state(hash, state_ttl=@state_ttl)
      @redis.hmset(this_process_tracker_state_key, *hash.to_a.flatten)
      @redis.expireat(this_process_tracker_state_key, (hash[:state_as_of] + state_ttl).to_i)
    end
Saved per hostname.pid with a TTL of :state_ttl option (default 15 minutes)