Deployment with Docker

Underlying storage driver

This section may be a bit too advanced for some readers and does not strictly require reading, but in the interest of fully understanding how Docker handles images and what issues you might encounter on large-scale deployments, I would encourage everyone to at least skim through it as the identification of backing-storage driver issues may be of use. Also, be aware that issues mentioned here may not age gracefully as the Docker code base evolves, so check out their website for up-to-date information.

Unlike what you might have expected from the Docker daemon, the handling of the image layers locally is actually done in a very modular way so that almost any layering filesystem driver can be plugged into the daemon. ...