I know a lot about Mesos and Mesosphere's DCOS, so can comment on those:
* There are users of these systems that get 90+% cluster utilization.
* Pre-emptable tasks (e.g., best effort scheduling vs guaranteed SLA scheduling) will be landing in Mesos.
* Mesosphere is building advanced scheduling plug-ins that will use the new scheduling models to do oversubscription of a cluster, helping to drive utilization to the 90%+ range without the need for any special tooling. You can get an idea of some of the algorithms being employed by checking out the Kozyrakis/Delimitrou Quasar paper[1].
* There are users of these systems that get 90+% cluster utilization.
* Pre-emptable tasks (e.g., best effort scheduling vs guaranteed SLA scheduling) will be landing in Mesos.
* Mesosphere is building advanced scheduling plug-ins that will use the new scheduling models to do oversubscription of a cluster, helping to drive utilization to the 90%+ range without the need for any special tooling. You can get an idea of some of the algorithms being employed by checking out the Kozyrakis/Delimitrou Quasar paper[1].
[1] http://csl.stanford.edu/~christos/publications/2014.quasar.a...