Zero-Downtime Reloads With PM2 Cluster Mode: What Actually Has to Be True
PM2 can reload Node.js workers without dropping requests, but only if the app is stateless and handles shutdown signals. Here is the practical checklist.
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nodejsRun a Node.js Application in PM2 Cluster Mode for Better Performance and Fault Tolerance
Learn how to launch a Node.js app with PM2’s cluster mode to utilize all CPU cores, gain automatic restarts, and improve fault tolerance.
Filling Every Core with PM2 Cluster Mode and Ecosystem Files
PM2 cluster mode uses every CPU core and supports zero-downtime reloads, but only if your app is stateless and handles SIGINT. Here is how to configure it with an ecosystem file and verify it works.
PM2 Cluster Mode Architecture: Scaling Node.js Beyond a Single Thread
PM2 Cluster Mode lets Node.js use all CPU cores by forking workers that share a port. This architecture note covers the minimal design, data boundaries, operational checks, failure modes, and when to move beyond it.
Zero‑downtime reloads with PM2 cluster mode and graceful shutdown
Learn how to configure PM2’s cluster mode so a Node.js service can be reloaded without dropping active requests, and understand the trade‑offs involved.
PM2 Cluster Mode vs Fork Mode: Choosing the Right Execution Mode for Your Node.js App
Cluster mode scales a stateless Node.js app across CPU cores with zero-downtime reloads; fork mode keeps in-process state safe. A decision table, ecosystem.config.js for both, and validation steps.
PM2 Cluster Mode or Fork Mode? A Decision Guide for Node.js Deployments
When one pm2 process is enough, what cluster mode demands from your app's state handling, and how to configure and verify zero-downtime reloads.
Scaling Node.js Apps with PM2 Cluster Mode: When and How to Use It
Learn how PM2’s cluster mode spreads Node.js workloads across CPU cores, verifies load‑balancing, and handles zero‑downtime reloads—plus the memory and state limits you must watch.
Which shutdown strategy should a PM2 cluster-mode app use for WebSocket clients during zero-downtime reloads?
I am planning to migrate a small Node.js HTTP service from PM2 fork mode to cluster mode so deploys can use pm2 reload instead of stop/start, avoiding the brief listener gap a single forked process creates. The app will run as at least two cluster instances on Linux, with PM2 and Node versions pinned but not yet finalized. The plain HTTP path seems well unde