protected function createMemcachedStore()
    {
        $serverArray    = $this->config['servers'];
        $persistent     = boolval($this->config['persistent']);
        $name           = trim($this->config['server_name']);
        $prefix         = trim($this->config['prefix']);

        if ($persistent && (strlen($name) > 0)) {
            $memcached  = new Memcached($name);
        } else {
            $memcached  = new Memcached();
        }

        if (!sizeof($memcached->getServerList())) {
            $memcached->addServers($serverArray);
        }

        return new MemcachedStore($memcached, $prefix);
    }