This is an example of why analogies should never be used (except perhaps if trying to explain a concept, not something tangible). ATM software has nothing to d

This is an example of why analogies should never be used (except perhaps if trying to explain a concept, not something tangible). ATM software has nothing to do with the backend storage of the data. My point is that I bet when the data is actually written to durable storage in the backend, the set of data being written will be wrapped in an ACID transaction.