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Why Microservices Over Monolithic?

Monolithic architecture is a traditional architectural pattern where all the modules are composed as one single application. All the components of the application are interdependent on each other and so the deployment of the whole application is necessary even if there is a single point of failure. It requires big teams working on one single application and also every member of the team has to know about whole of the application. This might be time-consuming for newcomers to overcome the learning curve and waste of time for the existing team members in knowledge transfer. Microservice architecture, on the other hand, overcomes all of these drawbacks by modularising the whole application into small independent and inter deployable units.

Why not Monolithic?

  • Inflexible:The technologies used in Monolithic applications are hard to be changed once the application is in form as that requires changing of the whole application. This is expensive in terms of time and cost.
  • Unreliable: Any single point of failure will affect the entire application as all the modules are linked to each other.
  • Unscalable: Monolithic applications are also challenging to scale as different modules have different resource requirements.
  • Tightly Coupled: As the whole application is like a single ball of mud, any change in the application may affect its dependable resources too.
  • Deployment:Monolithic applications deployment will surely bring down the whole application even if there is a single line of code change or an entire new feature is added. And so, it might not be a good fit for building complex applications.

Why go for Microservices?

Microservice architecture breaks down the whole application into individual, independent and mutually exclusive entities. This way, we can have smaller teams working on different applications and so the productivity increases. Each microservice will have its own Database schema. Any change in any microservice would result in deployment of that respective unit and the remaining microservices would be running independently. Microservice architecture is analogous to hexagonal architecture, as it has a business domain and multiple adapters running on different ports that connect to Mobile UIs, Database etc.

  • Better Organization:Each microservice is defined with a single job of its own and does not matter with what other microservices are performing. For example, billing microservice would have all the business logic related to Payments and Payment Gateways and their related adapters etc.
  • Developer Independence:As each microservice is to be built independently, it calls for multiple small teams working in parallel and if any new functionality is to be built, a new team can be formed and made to work separately without depending on other microservices’ extent of how much is completed. Complex team issues can thus be resolved.
  • Scalable: As microservices are built as a smaller chunk, fewer resources are enough for building them and therefore it is easily scalable to meet increasing demand of that specific component alone.
  • Develop & Deploy Independently:If there is any issue in any of the microservice, only that single microservice can be modified and deployed individually, which would not result in any unthinkable anomalies to the remaining microservices.
  • Business Relativity:Microservice architectures are split along business domain boundaries, organized around capabilities such as logistics, billing, etc. This increases independence and understanding across the organization as different teams are able to use a specific product, own and maintain it for its lifetime.

Successful migration of companies to microservices:

Source: N-iX (https://www.n-ix.com/successful-migration-microservices-why-when-how/)

Few Companies that utilize Microservice Architecture:

After identifying the amazing benefits provided by Microservice Architecture, we at MOURI Tech have also successfully joined the above league.

Contact for further details

Shakiya Khatun Ahmed
Technology Specialist
shakiyaa.in@mouritech.com
MOURI Tech

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