• What is event sourcing?
• How is it different from traditional storage?
• What are some of the benefits?
• What are some of the downsides?

Event sourcing is a method of storing data by saving events instead of doing updates to a model.

Every event that causes an update to the system is saved so that the state of the database can be recreated through the events.

With event sourcing we can drop our models and recreate them whenever we want, we can also replay the events until the model is in a state we want.

We can know what our state was at any point in time and recreate it whenever we want.

We can see every change to the system which is amazing for traceability.

We need to store more data.

If we want to change an existing field on a model it is a bit of a hazzle.

There is more code.