门户网站首页怎么样取数据！

如果操作系统是UNIX的话可以把生成的页面放入单独的文件夹里，生成完毕后改一下符号链接指向新的文件夹，切换只用相当短的时间。

门户的首页是分块的，也并不是自动生成，而是人工编辑的

1. Optimize database for optimized queries
- Export data from the transactional database to a denormalized read-only database that has indexes designed for queries
- Decentralize database

2. Cache data in the memory (before there was DB, all data was stored in memory)
- This only works for small amount of data
- Write a thread to periodically load data from DB to memory; have Web page use the in memory variables without running SQL;
- or have other code update in-memory variables, then write a thread to write data into DB to persist; need to deal with failover scenarios
- Not good for CGI or clustered systems

3. Use Web page cache products, with the cached copy periodically updated from the backend
- One variation of this is to pre-generate the static pages as discussed above

4. Mix use all of the above if you want the best of all; consider use different programming lauguages, different application servers and different databases for different parts of a page or a site

5. Read http://developer.yahoo.com/performance/rules.html to further optimize the Web site

6. ?