docs: function reload(req, res) {
    var log = this.log;
    if(Persistence.loading) {
      return res.send(new Error('database load in progress'));
    }
    Persistence.load(this.state.store, this.state.conf,
      function onLoad(err, time, diff, version) {
        if(err) return log.warning('db reload error: %s', err.message);
        log.notice(
          'db reloaded by DEBUG RELOAD: %s seconds (v%s)', time, version);
      }
    );
    res.send(null, Constants.OK);
  }