What is the use of cluster in node JS?

The Node. js Cluster module enables the creation of child processes (workers) that run simultaneously and share the same server port. Each spawned child has its own event loop, memory, and V8 instance. The child processes use IPC (Inter-process communication) to communicate with the parent Node.

When should one not use NodeJs?

When Should You Not Consider Using Node. js? 3 Unsuitable Use Cases

1. A CPU-Heavy Application: Using Node. js Is Simply a Bad Idea. Face it, deal with it and…
2. A Simple CRUD (or HTML) Application. No need to get your hopes high when using Node.
3. A Relational Database-Backed Server-Side App. Why isn’t Node.

How can you improve the scalability of a node js app?

The easiest thing to do to scale a big application is to clone it multiple times and have each cloned instance handle part of the workload (with a load balancer, for example). This does not cost a lot in term of development time and it’s highly effective. This strategy is the minimum you should do and Node.

What is PM2 in node JS?

PM2: A production process manager for Node. js applications that has a built-in load balancer. PM2 enables you to keep applications alive forever, reloads them without downtime, helps you to manage application logging, monitoring, and clustering.

What is the difference between FS readFile and FS readFileSync?

readFileSync() is synchronous and blocks execution until finished. These return their results as return values. readFile() are asynchronous and return immediately while they function in the background. You pass a callback function which gets called when they finish.

What is PM2 cluster?

The cluster mode allows networked Node. js applications (http(s)/tcp/udp server) to be scaled across all CPUs available, without any code modifications. This greatly increases the performance and reliability of your applications, depending on the number of CPUs available.

How good is Nodejs?

As you see, Node. js is a powerful tool showing excellent performance in many cases. The list of Node. js application examples is quite long, and your project may very well benefit from using this technology.

Why Nodejs is a bad choice?

However, there is a downside to Node. js being single-threaded. The single-threaded implementation makes Node a bad choice for CPU-intensive programs. Unlike in a multi-threaded program, where one thread can be doing the CPU-intensive task and others can handle arriving requests, a Node.

Does NodeJS scale well?

Where Node. js really shines is in building fast, scalable network applications, as it’s capable of handling a huge number of simultaneous connections with high throughput, which equates to high scalability.