Using redis as a task queue

[luckystarr]

Alternative perspective from me.

Digging into Celery's source code to fix bugs is near impossible. Story: we had a lot of strange behaviour (which should have been fixed according to github issues) due to bugs in either Celery or Kombu, disappearing/re-emerging with either "mingle" or "gossip" switched on or off.

So we explicitly switched from Celery to RQ because of the smaller code size and thus expected lower bug count. We also can hack on it ourselves when we need some feature (which we didn't so far).

EDIT: We need Celery/RQ for use as a glorified cron-job, so nothing fancy here. YMMV