Cron jobs and schedulers with BullMQ

<p>Your API endpoint sends an email, generates a PDF, and resizes an image. Response time: 8 seconds. Users rage-quit. Move heavy work to a background queue.</p> <h2> Basic Queue

<p>When a customer-support system retries outbound webhooks, the cleanup job is easy to underestimate. A nightly delete of old delivery records may fit in one request today and

<p>Every team ends up here. One cron job at 02:00 charges the orders. Another at 02:15 ships them, set<br /> fifteen minutes later because that's <em>usually</em> long enough for

<h2> Stop Installing Redis Just to Run Background Jobs </h2> <p>Most Node.js apps reach for Redis the moment they need background jobs. But before you add that dependency, it's

<h1> MERN Cheat Sheet — Part 2 </h1> <p><code>(verify)</code> = not in my repos and I'm not 100% sure of the API. Versions: see Part 1 (backend: bullmq ^6.3.11, ioredis ^6.0.0,

<p>Short answer: for a scheduled daily report email backend, use cron to start one coordinator, then put one durable, idempotent delivery job per subscriber behind it; direct

<p>You want to run a job every night at 2am. Easy, cron does that. Now you want to run a million jobs, each on its own schedule, across a fleet of machines where any node can die

<p>Short answer: keep the weekly schedule, report data, and HTML-to-PDF rendering behind three separate contracts, then let one idempotent job compose them.</p> <p>The deciding