[文件存储](shu-ju-ku/wen-jian-cun-chu.md) [缓存](shu-ju-ku/huan-cun.md) [关系数据库](shu-ju-ku/guan-xi-shu-ju-ku.md) [非关系数据库](shu-ju-ku/fei-guan-xi-shu-ju-ku.md) [orm模型](shu-ju-ku-mo-xing.md)