No. of topc&subscriptions limitations on Pub/Sub

[Type World]

I'm developing an app that requires a scalable Pub/Sub implementation. The project is currently sponsored by Google, so my server naturally runs on Google App Engine.

I'm confused by Pub/Sub’s limitations of 10K topics and 10K subscribers per topic. I need both to be truly scalable, and both publication as well as subscription libraries to be available in Python. On the other hand, I required few requests and not much throughput. Only the amount limitations worry me. They need to be truly scalable.

I've had a look at Firebase Cloud messaging, but couldn't find a Python implementation for the subscriptions, so that one seems to be a dead end for me.

Could the limits for Pub/Sub be lifted per project? Could my sponsor/team leader invoke such a lift?

Thank you

[Monica (Google Cloud Platform)]

The Pub/Sub limits apply at the project level. Several projects can be used if you need more than 10,000 topics or 10,000 subscriptions. You can also try to request slightly more quota by opening a case with GCP support.

Firebase Cloud messaging looks more appropriate for your use case as compared to the Pub/Sub system and you can reference these guides [1] [2] [3] for using the Python language.

[1] https://firebase.google.com/docs/admin/setup#python

[2] https://firebase.google.com/docs/reference/admin#python 

[3] https://github.com/firebase/firebase-admin-python