[thaJeztah]

> because the command is "docker run", with additional settings

The `-m` flag was already present in docker run. Swarm makes use of that flag to decide on which host to put a container. The `constraint:` setting is indeed new, but (afaik) the values behind it are not pre-defined, so if someone develops an alternative clustering-backend they should be able to make use of that for their needs.

In any case, Swarm will be pluggable, so other back ends are possible and can be developed by other parties.

[jacques_chester]

Thanks.