How to write denormalized data in Firebase

Question

I\'ve read the Firebase docs on Stucturing Data. Data storage is cheap, but the user\'s time is not. We should optimize for get operations, and write in multiple places.

Answer 1

To add to Franks great reply, I implemented the eventual consistency approach with a set of Firebase Cloud Functions. The functions get triggered whenever a primary value (eg. users name) gets changed, and then propagate the changes to the denormalized fields.

It is not as fast as a transaction, but for many cases it does not need to be.