Question
You have a Fabric workspace that contains a Real-Time Intelligence solution and an eventhouse.
Users report that from OneLake file explorer, they cannot see the data from the eventhouse.
You enable OneLake availability for the eventhouse.
What will be copied to OneLake?
- A. only data added to new databases that are added to the eventhouse
- B. only the existing data in the eventhouse
- C. no data
- D. both new data and existing data in the eventhouse Correct
- E. only new data added to the eventhouse
Explanation
Turning on OneLake availability creates a logical Delta Lake copy of the KQL database data. When you enable it, you can select the Apply to existing tables option to include a historic backfill, and newly ingested data keeps flowing to OneLake after that. The documentation says that once availability is on, you can access all the data at the OneLake path, and that turning it back on makes all data available, including the historic backfill. Answers that say only new data or only existing data is copied describe just part of this behavior. Saying no data is copied ignores what the feature does.
