linux 增量升级服务器，主要负责不定时处理手机终端进行某个插件升级，处理多tcp连接，同时加入简单客户端链接demo-linux upgrade server, mainly manipulating time to time plugin upgrade applications by mobiles, handling multiple tcp links, and also a demo client.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001029s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.071537s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001222s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001232s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000991s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003290s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000779s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003517s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014167s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001303s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 157662 [ RunTime:0.017781s ]
