How GoodJob's Cron does distributed locks

26-Jan-2023 934
GoodJob is a multithreaded, Postgres-based, ActiveJob backend for Ruby on Rails. GoodJob has many features that take it beyond ActiveJob. One such feature is cron-like functionality that allows scheduling repeated jobs on a fixed schedule.This post is a brief technical story of how GoodJob prevents duplicated cron jobs from running in a multi-process, distributed environment.
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