These two options are not mutually exclusive. When you want to limit the max CPU time available to a container use quotas (--cpus). When you want to set relati

These two options are not mutually exclusive. When you want to limit the max CPU time available to a container use quotas (--cpus). When you want to set relative priorities (compared to other containers/processes), use shares. These two options can be combined, it all depends on what you need.