From: Ewan Mellor [ewan.mel...@eu.citrix.com] > For example, if I charge my customers for a month of usage, even if they only > run the VM for a part of that month, then my billing system needs to be able > to say "that VM has moved from here to here, but it's actually the same VM, > so I'm charging for one month, not two". This is the current charging scheme > for RHEL instances hosted on Rackspace Cloud > (http://www.rackspace.com/cloud/blog/2010/08/31/red-hat-license-fee-for-rackspace-cloud-servers-changing-from-hourly-to-monthly/), > not just a corner-case example.
Good use cases. > To your point about the boundary of preservation of ID, that's a good > question. If you ignore the security / trust issues, then the obvious answer > is that IDs should be globally, infinitely, permanently unique. That's what > UUIDs are for. We can generate these randomly without any need for a central > authority, and with no fear of collisions. It would certainly be nice if my > VM can leave my SoftLayer DC and arrive in my Rackspace DC and when it comes > back I still know that it's the same VM. That's the OpenStack dream, right? Hmm, I may have been swayed against UNC. Routing and caching can still be layered on a UUID without having to parse it. -S _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp Confidentiality Notice: This e-mail message (including any attached or embedded documents) is intended for the exclusive and confidential use of the individual or entity to which this message is addressed, and unless otherwise expressly indicated, is confidential and privileged information of Rackspace. Any dissemination, distribution or copying of the enclosed material is prohibited. If you receive this transmission in error, please notify us immediately by e-mail at ab...@rackspace.com, and delete the original message. Your cooperation is appreciated. _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
