Memcache是支持TCP协议的端口型程序，命令模式是文本模式。
如果要删除数据，可以直接telnet过去，输入命令即可删除。
telnet 122.224.187.173 1114
Trying 122.224.187.173...
Connected to 122.224.187.173.
Escape character is '^]'.
delete MusicPlus_PlayerSkinHtml:1StyleCode:Default
DELETED <--这是返回的结果，表示删除成功
get SuperStar_Ver_1.1.0.3_GetUserTrackListSI:60PS15
delete SuperStar_Ver_1.1.0.2_GetUserTrackListSI:0PS15
参考：http://hi.baidu.com/meizhe/blog/item/e689f2de9ce6a65295ee3723.html