外网服务器 
                                           *  
                                      *  
                                      *    
                                      *       1、外网服务器与内网服务器之间是自动通过 
                                        内  内  内   p2p方式同步数据
                                        网  网  网  2、内网服务器自动侦测硬盘容量,自动删除点播率低的歌曲
                                        服  服  服  3、服务器使用Linux系统   
                                        务  务  务   
                                        器  器  器 
                                        1   2  3 
                                   * 
                                  *  *  * 
                                *    *  * 
                                内    内  内 
                                    网     网  网 
                                    用     用  用 
                                    户     户  户 
                                    1     2   3