/**
  * getConn 
  * 
  * @Access public
  * @Return void
  */
 private static function getConn()
 {
     global $memServers;
     if (empty($memServers)) {
         return FALSE;
     }
     if (!extension_loaded('memcache')) {
         MyException::Exception('请先安装PHP中Memcache模块');
     }
     if (empty(self::$m)) {
         $m = new Memcache();
         //系统默认对象
         foreach ($memServers as $key => $value) {
             $m->addServer($key, $value);
         }
         self::$m = $m;
     }
     if (empty(self::$prefix)) {
         self::$prefix = $_SERVER['SINASRV_MEMCACHED_KEY_PREFIX'] ? $_SERVER['SINASRV_MEMCACHED_KEY_PREFIX'] : 'Reluc-';
     }
     return self::$m;
 }