CQRS and event sourcing
CQRS is a software design pattern used in distributed systems (often microservices) to separate read and write operations. This separation offers several advantages, particularly when dealing with applications with high read/write disparities or complex data models.
When you apply for jobs that use distributed architecture in their applications, you often hear about CQRS and, most probably, will be asked about its usage. First things first – we need to understand that CQRS is not an architecture style; it is neither an architecture nor architectural principle. It is just a design pattern that has no wide usage. So, what is CQRS? Before answering this question, let’s understand the problem that CQRS seeks to resolve.
Traditional monolithic applications typically use a single database to both read and write data. This approach can lead to the following challenges as an application grows:
- Scaling bottlenecks: When read traffic spikes...
