一个nandflash管理的模块，根据nandflash的特性实现了物理block到虚拟块的映射，没有实现磨损均衡算法。
A nandflash management module, according to the characteristics of nandflash
implements the mapping of physical block to the virtual block, no wear
equalization algorithm
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002645s ]
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:0.097291s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001681s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003197s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001775s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005734s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001179s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.009749s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.020202s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001327s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 256703 [ RunTime:0.017455s ]
