Hi Alex, > -----Original Message----- > From: Alex Glikson [mailto:[email protected]] > Sent: Monday, February 03, 2014 7:01 PM > To: OpenStack Development Mailing List (not for usage questions); Oomichi, > Kenichi > Subject: Re: [openstack-dev] [Nova] bp: nova-ecu-support > > Similar capabilities are being introduced here: > https://review.openstack.org/#/c/61839/ > <https://review.openstack.org/#/c/61839/>
Thank you for the info. That is very interesting patch and bp. I will see it more deeply. Thanks Ken'ichi Ohmichi --- > From: Kenichi Oomichi <[email protected]> > To: "OpenStack Development Mailing List (not for usage questions)" > <[email protected]>, > Date: 03/02/2014 11:48 AM > Subject: [openstack-dev] [Nova] bp: nova-ecu-support > > ________________________________ > > > > > Hi, > > There is a blueprint ECU[1], and that is an interesting idea for me. > so I'd like to know the comments about ECU idea. > > After production environments start, the operators will need to add > compute nodes before exhausting the capacity. > On the scenario, they'd like to add cost-efficient machines as the > compute node at the time. So the production environments will consist > of different performance compute nodes. Also they hope to provide > the same performance virtual machines on different performance nodes > if specifying the same flavor. > > Now nova contains flavor_extraspecs[2] which can customize the cpu > bandwidth for each flavor: > # nova flavor-key m1.low_cpu set quota:cpu_quota=10000 > # nova flavor-key m1.low_cpu set quota:cpu_period=20000 > > However, this feature can not provide the same vm performance on > different performance node, because this arranges the vm performance > with the same ratio(cpu_quota/cpu_period) only even if the compute > node performances are different. So it is necessary to arrange the > different ratio based on each compute node performance. > > Amazon EC2 has ECU[3] already for implementing this, and the blueprint > [1] is also for it. > > Any thoughts? > > > Thanks > Ken'ichi Ohmichi > > --- > [1]: https://blueprints.launchpad.net/nova/+spec/nova-ecu-support > <https://blueprints.launchpad.net/nova/+spec/nova-ecu-support> > [2]: > http://docs.openstack.org/admin-guide-cloud/content/ch_introduction-to-openstack-compute.html#customize-flavors > <http://docs.openstack.org/admin-guide-cloud/content/ch_introduction-to-openstack-compute.html#customize-flavors> > [3]: http://aws.amazon.com/ec2/faqs/ <http://aws.amazon.com/ec2/faqs/> "Q: > What is a “EC2 Compute Unit” and why did > you introduce it?" > > > _______________________________________________ > OpenStack-dev mailing list > [email protected] > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev> > > _______________________________________________ OpenStack-dev mailing list [email protected] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
