How does Sidekiq work? | Mike Perham

Sidekiq is one of the most ubiquitous1 Ruby background job processors out there. To anybody who has worked with Ruby on and off Rails, it needs no introduction. Sidekiq has a 10 year track record of being an efficient, battle-tested and simple-to-use solution for offloading the execution of application logic into the background.It utilizes a threaded model for job processing, uses Redis as a backend and claims to have an ‘at least once’ semantic when it comes to processing jobs (with a caveat) in a free open-source version. Sidekiq also offers 2 additional paid versions - Pro and Enterprise, each of them introducing additional features and extensions. For obvious reasons, I will not go into the details of these versions.