Introduce yourself to the world of Microservices

To gain a deeper grasp of microservices, we must first understand the differences between microservice and monolithic architecture.

A monolithic application means a single, indivisible piece of software. A client-side user interface, a server-side program, and a database are typically included in such a system. It is integrated, all functions handled and served from a central place. Generally, monolithic applications have one large codebase and lack modularity. Developers use the same code base when they wish to update or replace something.

A monolithic application is a single unified unit, but a microservices architecture divides it into smaller autonomous units. Every application procedure is handled by these units as a separate service. As a result, each service has its own logic and database, as well as the ability to perform its own specialized operations.

The whole functionality of an application is broken up into independently deployable modules that communicate with one another via defined methods called APIs (Application Programming Interfaces) in the microservice architecture. Each service has its own scope and can be independently updated, deployed, and scaled.

The Scale Cube is a three-dimensional scalability paradigm described in the book The Art of Scalability.

Running numerous copies of an application behind a load balancer is known as X-axis scaling. Each copy handles 1/N of the load if there are N copies. This is a straightforward and widely used method of scaling a program.

An application should be able to scale up and down through x-axis. If one instance is insufficient, we should be able to spawn another instance and go on.

When using Z-axis scaling each server runs an identical copy of the code. but at the database level, data is partitioned into different shards. Therefore each server is responsible for only a subset of the data. Some component of the system is responsible for routing each request to the appropriate server. for Ex: European customers are directed to European servers, Asian customers are directed to Asian servers etc.

This approach of scaling can be achieved by decomposing an application into smaller, independently deployable units. Microservices are well-suited to such a scaling paradigm because microservices are independent smaller services with their own database.

As a result, if our application has a high-demand service, we can only clone that particular service, rather than cloning the entire application.

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