python - flask 进程间通信

Question

我使用gunicorn开了4个worker， 在发生请求的时候我需要对count变量进行加1， 我怎么保证这个count的正确性而不是被多个进程所抢占。

Answer 1

It is recommended to use multiprocessing.managers
Introduction: http://www.cnblogs.com/Xjng/p/4902514.html

Answer 2

The easiest way is to add a global lock

Answer 3

If your count is stored in the database, the database will handle concurrency for you.

Answer 4

Can be solved in the database. For example, redis has the INCR command.