Storage and Volumes

State which graph driver should be used on which OS

Demonstrate how to configure devicemapper

Compare object storage to block storage, and explain which one is preferable when available

Summarize how an application is composed of layers and where those layers reside on the filesystem

Describe how volumes are used with Docker for persistent storage

Identify the steps you would take to clean up unused images on a filesystem, also on DTR

Demonstrate how storage can be used across cluster nodes