public function writeMany($data)
    {
        $cacheData = [];
        foreach ($data as $key => $value) {
            $cacheData[$this->_key($key)] = $value;
        }

        $success = $this->_Memcached->setMulti($cacheData);

        $return = [];
        foreach (array_keys($data) as $key) {
            $return[$key] = $success;
        }

        return $return;
    }