If you buy an enterprise storage frame there are a variety of mechanisms where as a storage consumer you just see a LUN, but in the backend individual extents/blocks/volumes are tiered in different performing areas.
These systems will transparently "promote" hot blocks to flash or faster spinning disk, etc and demote cold blocks based in usage patterns and policy, without the app being aware.
There are a lot of different ways to do it, ranging from tiering within the array to a storage virtualization solution that can tier data across different storage platforms. In one case I worked on a project where that virtualization tech was used to consolidate 10 data centers to 1, pretty much transparent to the end users and mostly transparent to the folks running apps. (Exceptions were ostly apps that built their own Storage HA)
These systems will transparently "promote" hot blocks to flash or faster spinning disk, etc and demote cold blocks based in usage patterns and policy, without the app being aware.
There are a lot of different ways to do it, ranging from tiering within the array to a storage virtualization solution that can tier data across different storage platforms. In one case I worked on a project where that virtualization tech was used to consolidate 10 data centers to 1, pretty much transparent to the end users and mostly transparent to the folks running apps. (Exceptions were ostly apps that built their own Storage HA)