Join 150K+ monthly readers. In-depth articles on Node.js, Microservices, Kubernetes and DevOps. With this article, we are launching a series of posts targeting developers who want to learn or refresh their knowledge about writing concurrent applications in general. The series will focus on well-known and widely adopted concurrency patterns in different programming languages, platforms, and runtime
![Concurrency and Parallelism: Understanding I/O - RisingStack Engineering](https://cdn-ak-scissors.b.st-hatena.com/image/square/6796bcf0e04dc5d30a6e8b755a794acf08dedc1a/height=288;version=1;width=512/https%3A%2F%2Fblog.risingstack.com%2Fwp-content%2Fuploads%2F2021%2F07%2Fconcurrency-and-parallelism-understanding-io.png)