Ravi Sir's Cards › AWS
Event sourcing log
This revision card explains Event sourcing log. It starts from the need that overwriting state erases the why behind every change. It describes store facts as an append-only event stream; rebuild state by folding. The how-to section notes append OrderPlaced , then replay to rebuild , then snapshot for speed. An example on the card is omar Hassan uses the event log as the audit source of truth.
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What this card says
Why do we need it?
Overwriting state erases the why behind every change.
What is it?
Store facts as an append-only event stream; rebuild state by folding.
event sourcing
How to do it
Append OrderPlaced → replay to rebuild → snapshot for speed.
Example
Omar Hassan uses the event log as the audit source of truth.