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Possibility of multiple graph storages for docker daemon?

just wondering if it is possible to have more than one storage location specified by the --graph parameter for docker daemon.
For example, i would like to have a devicemapper+loopback storage for testing on a harddrive filesystem and additionally, a way faster storage using devicemapper+thinpool on a SSD.

My idea was to have some small (commandline) utilities inside docker containers which should start/stop very quickly (i am using the --rm param for ‘run’).
Then, i also appreciate having loopback storage for other, non-time critical testing of docker images.

Any help regarding

  • switching the storage without restarting the docker-daemon (e.g. by specifying with the ‘run’ command)
  • or providing multiple storages for simultaneous usage
    would be greatly appreciated :slight_smile: