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Building a CQRS/ES web application in Elixir using Phoenix - Binary Consulting The event stream is the canonical source of truth. t is a perfect audit log A projection is an event handler that receives every persisted event from the event store. It executes queries against the database to add, update, and delete data. Event handlers run concurrently and are eventually consistent. CQRS An example of this is using different database access techniques for read and update. Daem...