Interesting document a colleague of mine wrote:
<a href="https:&#x2F;&#x2F;specs.openstack.org&#x2F;openstack&#x2F;openstack-specs&#x2F;specs&#x2F;chronicles-of-a-dlm.html" rel="nofollow">https:&#x2F;&#x2F;specs.openstack.org&#x2F;openstack&#x2F;openstack-specs&#x2F;specs&#x2F;...</a>