Storing data in the right place is essential for achieving this kind of over-the-top performance. Colossus internal users can dictate if their files need to go to an HDD or an SSD, but most developers employ an automated solution known as L4 distributed SSD caching. This technology uses machine learning algorithms to decide what policy to apply to specific data blocks. However, the system eventually writes any new data to the HDDs.

This is a good use of ML technologies.