In this episode, we will learn about Microservices and the advantages & disadvantages of using the Microservice architecture for your application.
The way that developers work to build applications started changing in the era of Web Applications.
In the past, the software was built as large monolithic applications, wherein a team of developers would take months to construct a large application.
Furthermore, when we want to add new functionalities into that project, we would need to add more code, and so the size of the code base for any given application kept on increasing over time.
So what starts as a small codebase might end up turning into a large complex codebase over time.
This will gradually make it very hard for developers to add new features, as they have to be very careful not to break the other parts of the code.
Now instead of building one huge application, developers break the application into small independent Chunks and assign different teams for building each of those modules.
These smaller code chunks are called microservices.
Basically, microservices are a way of breaking your application or service down into standalone, independent applications that can be run on different hardware.
Or server instances that can talk to each other over a REST API and work together to provide the functionality of your full application or product.
The microservice approach makes it easier to build applications, and more importantly, much easier to expand and scale.
It’s difficult to talk about microservices without talking about containers. Containers are the crux of what enables the implementation of Microservice architecture.
A container is a unit of software that packages code and its dependencies so the application can run quickly and reliably on different computing environments.
A container is the distribution method for each microservice. That is, it delivers the code where it needs to go.
Containers are plug-and-play, so if one microservice isn’t working for an application, developers can replace it with a different one without disrupting how the rest of the app functions.
Now let us look at the advantages of Microservices.
- Increased Business agility-According to a recent study, organizations using microservices get new software to market five times faster than those that don’t.
- Improved scalability. Microservices let you independently scale services up or down.
The setup time and cost of scaling is dramatically less than in a monolithic system.
- Fault Isolation. Even if one microservice fails, all the others will likely continue to work. This is a key part of the microservices architectural design.
4.Localized complexity. Each service is compartmentalized, meaning other teams working on the same project, need not be aware of the internal working of another team’s module.
This compartmentalization of knowledge and complexity makes it easier to create and large knowledge applications
Future-proofed applications. When innovations happen, and new or updated technology disrupts your software development process, microservice architectures makes it easier to respond by replacing or upgrading the individual services affected without impacting the whole application.
Now let us look at the disadvantages of Microservices.
- Microservice architectures can become complex. While Individual microservices are easier to understand and manage, the full application itself may end up with too many moving parts.
- Extensive Planning is needed for a successful microservice deployment. This is because all the microservices in an application must work together.
So, developers and software architects must carefully plan out how to break down all the functionality and dependencies.
- Proper sizing of microservices is critical and hard to calculate. If you make your microservices too big, you can end up with all the drawbacks of monolith codes.
If you make them too small, you will introduce too many dependencies.
- No control over 3rd party third-party microservices. Many microservices architectures include services from 3rd party, maintained by teams that you don’t have access to.
- Third-party services can change their APIs or dependencies at any time, which may break your application.
Building fault-tolerance into an application built using microservices can be more complex than doing so in a monolithic system.
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