Node.js Asynchronous and Concurrency Model. we are going to look at how Node.js handles the operations on the server-side with its very popular asynchronous and concurrency model. Async, concurrency, and parallelism explained. Node.js
In this article, we are going to look at how Node.js handles the operations on the server-side with its very popular asynchronous and concurrency model.
I/O operation means communication between a single process in a computer CPU with anything outside of that CPU. It can be a memory, disk, network, or even a process. The signals are shared in this communication. Most of the operations performed by a computer are I/O operations. In the server-side environment, I/O operations reference the disk and network resources access, which are comparatively slow to other operations.
There are many ways to handle these I/O operations. We can perform synchronously, but this is inefficient as one operation depends on the execution of another operation. We can fork a new process from the OS to handle each request, but during the scenario of lots of requests, it is difficult to carry out. There is another way, that is *Thread *which is considered a good way but it becomes a headache when threads access shared resources.
This means that a program can make a request for a network resource while doing something else, and then, when the network operation has finished, a callback will run that handles the result. Node uses a library called libuv to provide access to non-blocking network calls.
Even though Node application is single-threaded, it contributes to nonblocking I/O with the help of event loops and asynchronous API.
The main goal of this blog is to explain the “Architecture of Nodejs” and to know how the Nodejs works behind the scenes. Generally, most of the server-side languages, like PHP, ASP.NET, Ruby, and including Nodejs follows multi-threaded architecture. That means for each client-side request initiates a new thread or even a new process.
Looking to build dynamic, extensively featured, and full-fledged web applications? **[Hire NodeJs Developer](https://hourlydeveloper.io/hire-dedicated-node-js-developer/ "Hire NodeJs Developer")** to create a real-time, faster, and scalable...