_store example

        $lifetime = $this->getLifetime($specificLifetime);
        $metadatas = array(
            'mtime' => time(),
            'expire' => $this->_expireTime($lifetime),
        );

        if (count($tags) > 0) {
            $this->_log('Zend_Cache_Backend_ZendServer::save() : tags are unsupported by the ZendServer backends');
        }

        return  $this->_store($data, $id, $lifetime) &&
                $this->_store($metadatas, 'internal-metadatas---' . $id, $lifetime);
    }

    /** * Remove a cache record * * @param string $id cache id * @return boolean true if no problem */
    public function remove($id)
    {