Delta cache is an automatic hands-free solution that leverages high read speeds of modern SSDs to transparently create copies of remote files in nodes’ local storage to accelerate data reads . In comparison, you have choose what and when to cache with Spark cache.
Also
- Delta cache can be read and operated on faster than the data in the Spark cache.
- Eviction happens automatically on file changes
More details could be found at https://docs.databricks.com/delta/optimizations/delta-cache.html
