As shown, the diagram is vertically arranged into four layers, which represent the control hierarchy of processing information in the present moment. It is also horizontally arranged into three ...

This article discusses how to better understand databases by organizing them into three schema layers. What is a 3-level DBMS architecture? The three-level database management system (DBMS) ...

But Dropbox saw an opportunity to store these files in a separate layer. “When one is talking about cold storage, we are thinking of files that are accessed less often.