请教各位大神，nginx＋php下，在已经使用varnish的基础上，再加个redis的话，是否有必要这样做么？加了redis的话，会带来什么好处？
谢谢！
光阴似箭催人老，日月如移越少年。
Varnish or nginx caches complete pages, while redis caches raw data taken from the database, which is finally processed and synthesized by the program and fed to varnish or nginx. They are both caches, but the meaning is different.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Varnish or nginx caches complete pages, while redis caches raw data taken from the database, which is finally processed and synthesized by the program and fed to varnish or nginx. They are both caches, but the meaning is different.