George Crump is founder of Storage Switzerland, an analyst firm focused on the virtualization and storage marketplaces. Crump: In the never-ending world of tiered storage, it really breaks down into two types of storage; transactional (active) and passive storage. In the next entry, we will begin to talk about how to decide what data to put on what tier and how to get it there, he says. The next tier, before we get to hard disk, we have three flavors of memory, with more to come.”]
Source: https://www.darkreading.com/database-security/tiered-storage-redefined