The NodeJS Cluster Module
The NodeJS Cluster Module
About the Book
NodeJS processes runs on a single process, which means it does not take advantage from multi-core systems by default. If you have an 8 core CPU and run a NodeJS program via $ node app.js it will run in a single process, wasting the rest of CPUs.
Hopefully for us NodeJS offers the cluster module that contains a set of functions and properties that help us to create programs that uses all the CPUs. Not a surprise the mechanism the cluster module uses to maximize the CPU usage was via forking processes, similar to the old fork() system call Unix systems.
About the Author
Table of Contents
-
Understanding the NodeJS cluster module
- Introducing the cluster module
- A basic example
- Comunicating master and worker processes
- Conclusion
-
Using cluster module with HTTP servers
- How cluster module works with network connections ?
- Other alternatives to cluster module load balancing
- Conclusions
-
Using PM2 to manage NodeJS cluster
- Introducing PM2
- Conclusions
- References
-
Graceful shutdown NodeJS HTTP server when using PM2
- Starting a HTTP server
- How to shutdown properly an HTTP server ?
- Graceful shutdown/restart with and without PM2
- Conclusions
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