Device mapper storage in practice (Engine)

Docker and the Device Mapper storage driver

Device Mapper is a kernel-based framework that underpins many advanced volume management technologies on Linux. Docker’s devicemapper storage driver leverages the thin provisioning and snapshotting capabilities of this framework for image and container management. This article refers to the Device Mapper storage driver as devicemapper, and the kernel framework as Device Mapper.

Note: The Commercially Supported Docker Engine (CS-Engine) running on RHEL and CentOS Linux requires that you use the devicemapper storage driver.

An alternative to AUFS

Docker originally ran on Ubuntu and Debian Linux and used AUFS for its storage backend. As Do