What is the difference between SOA and Microservices

Question

Ok, as far as I've understood both in SOA and in Microservices modules should be independant and reusable. But what really differs SOA and Microservices ?

Answer 1

Both rely on the services as the main component but a lot of differences there. Few are below

SOA:

• Follows “share-as-much-as-possible” architecture approach
• Supports multiple message protocols
• Multi-threaded with more overheads to handle I/O
• Maximizes application service reusability
• Not focussed fully into DevOps / Continuous Delivery

MicroService:

• Follows “share-as-little-as-possible” architecture approach

• Uses lightweight protocols such as HTTP/REST & AMQP

• Single-threaded usually with use of Event Loop features for non-locking I/O handling

• More focused on decoupling

• Strong focus on DevOps / Continuous Delivery

Answer 2

Microservices Architecture is not an invention. Enterprises such as Amazon, Netflix, and eBay used the divide and conquer strategy to functionally partition their monolithic applications into smaller units, and resolved many issues. Following the success of these companies, many other companies started adopting this as a common pattern to refactor their applications. Eventually the pattern was termed as Microservices Architecture. Nothing radically new has been introduced in MSA. MSA is the logical evolution of SOA and supports modern business use cases.

Microservices vs SOA: How Are They Different?