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Scaling Your Node.js App with PM2: Cluster Mode vs Fork Mode

If you’re building a production-grade Node.js application, you’ve probably heard of PM2 — a powerful process manager that helps you manage and keep your application alive forever. But did you know PM2 supports multi-threading using cluster mode? In this article, I’ll walk you through the difference between Cluster mode and Fork mode in PM2, and how to use them with a real example using ecosystem.config.js.

Apr 28, 2025 - 11:59
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Scaling Your Node.js App with PM2: Cluster Mode vs Fork Mode

If you’re building a production-grade Node.js application, you’ve probably heard of PM2 — a powerful process manager that helps you manage and keep your application alive forever.

But did you know PM2 supports multi-threading using cluster mode?

In this article, I’ll walk you through the difference between Cluster mode and Fork mode in PM2, and how to use them with a real example using ecosystem.config.js.

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