程序框架采用懒加载、分布式服务器的设计，每张表都可有自己的DB服务器群和CACHE服务器(群)，单表都能承受千万级数据，运行速度快。-The program fr a mework uses lazy loading, distributed server design, each table can have its own DB server group and CACHE server (group), single table can withstand tens of millions