# docker storage drivers

## Docker supports the following storage drivers:

* **`overlay2`** is the preferred storage driver, for all currently supported Linux distributions, and requires no extra configuration.
* `aufs` is the preferred storage driver for Docker 18.06 and older, when running on Ubuntu 14.04 on kernel 3.13 which has no support for `overlay2`.
* `devicemapper` is supported, but requires `direct-lvm` for production environments, because `loopback-lvm`, while zero-configuration, has very poor performance. `devicemapper` was the recommended storage driver for CentOS and RHEL, as their kernel version did not support `overlay2`. However, current versions of CentOS and RHEL now have support for `overlay2`, which is now the recommended driver.
* The **`btrfs`** and `zfs` storage drivers are used if they are the backing filesystem (the filesystem of the host on which Docker is installed). These filesystems allow for advanced options, such as creating “snapshots”, but require more maintenance and setup. Each of these relies on the backing filesystem being configured correctly.
* The `vfs` storage driver is intended for testing purposes, and for situations where no copy-on-write filesystem can be used. Performance of this storage driver is poor, and is not generally recommended for production use.


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