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Device Mapper storage driver

MCR hosts that run the devicemapper storage driver use the loop-lvm configuration mode by default. This mode uses sparse files to build the thin pool used by image and container snapshots and is designed to work without any additional configuration.

Note

Mirantis recommends that you use direct-lvm mode in production environments in lieu of loop-lvm mode. direct-lvm mode is more efficient in its use of system resources than loop-lvm mode, and you can scale it as necessary.

For information on how to configure direct-lvm mode, refer to the Docker documentation, Use the Device Mapper storage driver.