Grokking Microservices for System Design Interviews
Vote

0% completed

​

Event Sourcing, Briefly

1. The Definition, and the Distinction That Matters

Event sourcing means the source of truth is an append-only log of events, not a table of current state. Append-only means you only add new records to the end. You never update or delete one that is already there.

Here is the contrast. A conventional account row stores balance: 70. An event-sourced account stores Opened(0), Deposited(100), Withdrew(30). The balance 70 is derived by replaying those events in order. State becomes a cache. History becomes the truth.

Now make the distinction that most descriptions miss, and make it

.....

.....

.....

Like the course? Get enrolled and start learning!

Reading Progress

0%

Vote for new content