pros and cons of micro services architecture

what are micro services?

Microservices, a revolutionary approach to software development, has gained tremendous popularity in recent years.This modern architectural style advocates breaking down monolithic application into multiple loosely-coupled services.Each service works independently and communicates with each other using lightweight protocols like http xmpp .The services can have their own database and they can also be deployed independent of each other.

1. Principles of Microservices

1.1. Service Decoupling: Microservices are built as independent units, enabling teams to work on different services simultaneously without affecting each other. This autonomy improves development agility and reduces bottlenecks.

1.2. Single Responsibility: Each microservice is designed to handle a specific business functionality. This makes the codebase more manageable and facilitates better understanding, maintenance, and debugging.

1.3. Interoperability: Microservices communicate through well-defined APIs, promoting seamless integration and the ability to use different technologies for each service.

1.4. Resilience: Microservices are designed to handle failures gracefully. If one service experiences an issue, it won't bring down the entire application, as other services can continue to function.

1.5. Scalability: With microservices, individual services can be scaled independently, allowing efficient resource utilization and cost optimization.

2. Advantages of Microservices

Improved Team Productivity: Microservices promote small, cross-functional teams, allowing developers to focus on their areas of expertise. This increases development speed and fosters innovation.

Scalable:- if we want to scale our application horizontally then we can use micro services as they are very good for this purpose. Also because of modularization they can be easily deployed as different services are made of small modules which can be deployed independently.

As the micro services are less dependent on each other this reduces the amount of coupling in the application,which is a desired quality.

3) Fault Isolation:- in a Monolithic application one error can bring down the whole application while in micro services architecture error in one service will bring down that service and other services will not be impacted.

4) Continuous Delivery:- Microservices support continuous integration and delivery (CI/CD) pipelines, enabling frequent and reliable deployments.

3. Challenges and Trade-offs

3.1. Operational Overhead: There are multiple services and each service can have thousands of instances,managing those instances can be challenging for the team.

3.2. Data Management: Different services can have their own independent Databases, hence ensuring data consistency and integrity across services can be demanding.

3.3. Service Discovery: As there are multiple services they need to locate each other in order to communicate with each other this is known as Service Discovery.

3.4. Testing and Debugging: Testing microservices involves handling various inter-service dependencies, making end-to-end testing more complex.

3.5. Security: Securing communication between services becomes crucial in a microservices architecture.

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