RQ (Redis Queue)

What RQ (Redis Queue) is

RQ (Redis Queue) is an open-source Python library for sending jobs to background worker processes. It runs Python function calls asynchronously and requires Redis 5 or later, or Valkey 7.2 or later. Job features include scheduled and repeating work, retries, bulk enqueueing, groups, dependencies, unique jobs, and concurrency rate limits; unique jobs cannot be combined with dependencies. Failed jobs are kept with exception details, and RQ supports retries and custom exception handlers. The `rq info` console command provides monitoring, while the separately distributed RQ Dashboard offers a web frontend. Documentation describes Django use, including through django-rq, plus patterns for Heroku, Sentry, Supervisor, and systemd. RQ is self-hosted and licensed under BSD. Its default pickle serializer is intended only for trusted Redis instances; JSON is an alternative. Workers need a system implementing `fork()`, so Windows use requires Windows Subsystem for Linux and a bash shell. The worker must be able to import job functions, and producers and workers must share source code.