Share memory areas between celery workers on one machine

Question

I want to share small pieces of informations between my worker nodes (for example cached authorization tokens, statistics, ...) in celery.

If I create a global inside my tasks-file it's unique per worker (My workers are processes and have a life-time of 1 task/execution).

What is the best practice? Should I save the state externally (DB), create an old-fashioned shared memory (could be difficult because of the different pool implementations in celery)?

Thanks in advance!

Answer 1

I finally found a decent solution - core python multiprocessing-Manager:

from multiprocessing import Manager
manag = Manager()
serviceLock = manag.Lock()
serviceStatusDict = manag.dict()

This dict can be accessed from every process, it's synchronized, but you have to use a lock when accessing it concurrently (like in every other shared memory implementation).