In software engineering, a monolithic application is a single-tiered software application. It consists of 3 layers:
Using monolithic architecture has several advantages:
Monolithic applications require just one directory, and everything is usually in one place, making it easier and straightforward to develop. The deployment is also quite simple because there's usually one file/directory instead of multiple deployments.
It's challenging to test and debug multiple components. A monolithic application allows us to implement end-to-end testing, making it easier to fix the bugs.
Note: End-to-end (E2E) testing is a type of testing that allows us to test our workflow from the beginning to the end.
Looking at the various advantages of monolithic architecture, why do people still prefer Microservices. Let’s take a quick look at what Microservices architecture is?
In monolithic, we build a single unit application whereas, in microservices, we build our application by splitting it into interconnected services, each of which has separate databases. The main issue with monolithic applications is scalability and maintenance, which increases with bigger and more complex projects.
Microservices tackle this problem in a way that it performs more frequent deployments, which also saves time and resources. Moreover, microservices make it more manageable as each microservice is small and understandable to developers.
However, the complexity of the level is much higher in microservices compared to monolithic. If it’s not done correctly, it can lead to a loss of resources and time.
Here is a comparison between monolithic and microservices:
Built as a single unit application
Built as a combination of multiple interconnected services that are run independently
Re-usability is difficult
Re-usability is simple
Multiple code files
Useful for smaller projects
Useful for complex projects
Difficult testing and debugging
Choosing the right architecture is vital for every project. This article covers what a monolithic application is and when we should opt for it. A similar architecture, Microservices, was discussed to provide us with a broader picture when we're choosing between the two.
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