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In the world of DevOps and software development, there are a lot of buzzwords floating around. “Event sourcing” is one of them. But what is event sourcing? And how can it be used with microservices? If you’re wondering about event sourcing and how it can benefit your next project, read on for a crash course.

What Is Event Sourcing?

In short, event sourcing is a method of storing data that captures all changes to that data as a sequence of events. An event is simply an action that has occurred, such as a user creating an account or updating their profile information. This event-based approach has a number of benefits, including making it easier to track down bugs and recover from data corruption.

Event Sourcing with micro services

Event sourcing has been gaining popularity in recent years as more and more companies are moving to microservices. Event sourcing is a great fit for microservices because it allows each service to maintain its own event log, which can be used for replay, debugging, auditing, and so on.

Some of the biggest names in tech are using event sourcing with microservices, including Amazon, Netflix, LinkedIn, Twitter, Airbnb, and Uber. Event sourcing can be a bit complex to set up and manage, but the benefits are well worth it for companies that need the flexibility and scalability that microservices provide.

How Can Event Sourcing Be Used with Microservices?

Event Sourcing with microservices

Event sourcing is often used in conjunction with microservices—i.e., a software architecture that breaks down a monolithic application into smaller, more manageable services. When used together, event sourcing and microservices can provide a number of benefits, including improved scalability and easier debugging.

Event sourcing is a great way to keep your microservices in sync. By storing all of your service’s events in a central place, you can easily replay them whenever a new service needs to be brought up-to-date. This approach also makes it easy to rollback changes if something goes wrong.

There are a few things to keep in mind when using event sourcing with microservices.

  • You’ll need to make sure that each service has its own unique ID. This will ensure that each service can be identified independently when replaying events.
  • You’ll need to ensure that your events are idempotent. That is, they can be applied multiple times without changing the state of the system. This is important because it allows you to replay events even if some of them have already been processed by other services.
  • You’ll need to make sure that your event store is highly available. This ensures that your microservices can always access the events they need, even if one or more services are down.

Tips for event sourcing with microservices

1. Keep your events small and atomic

2. Make sure your events are well-formed

3. Use event sourcing to build a history of state changes

4. Be careful when using idempotent operations

5. Don’t forget about security

6. Consider using an event bus

7. Use event sourcing to power real-time applications

8. Make use of event sourcing tools and frameworks

9. Know when not to use event sourcing

Event sourcing is a powerful tool for building microservices. By keeping events small and atomic, you can ensure that your data is well-formed and your history of state changes is accurate. Additionally, using event sourcing to power real-time applications can give you a significant performance boost. And finally, by making use of event sourcing tools and frameworks, you can streamline the development process and make your life much easier.


Event sourcing is a powerful tool that can be used to improve the efficiency and maintainability of your software projects—especially when used in conjunction with microservices. If you’re looking for ways to optimize your development process, event sourcing is definitely worth considering.