设备管理主要包括设备的分配和回收、同时实现设备独立性。假定模拟系统中有A（3台）、B（2台）、C三种设备，采用安全分配方式。-Device Manager includes equipment distribution and recovery, while achieving device independence. Simulation system assumes that there are A (3 units), B (2 units), C three kinds of equipment, the introduction of safety distribution.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001224s ]
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:0.066815s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001080s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001255s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001004s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003318s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000874s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003804s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014943s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001267s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 55679 [ RunTime:0.018839s ]
