All comments appreciated. https://blueprints.launchpad.net/nova/+spec/spare-hosts In summary, when one sets up a nova install, they can set some of the machines to spare. Spare means disabled plus the guarantee that there are no customer vms running on there. It differs from maintenance mode in that setting a spare that has VMs on it, will just fail, rather than cause a migration. Spare machines can be used for quick chassis swaps or can be enabled to receive an emergency migration, or when an end user needs more space than was initially planned. Having 'spare' machines in your install a useful safety buffer to let you know when to start adding more. https://wiki.openstack.org/wiki/Blueprint-spare-hosts#Possible_later_additions ---- Please comment on implementation ideas, additional features, and perceived usefulness. Many Thanks, Matthew Sherborne -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20130323/2d900c38/attachment.html>