Open Stack

Hi Alex,

> -----Original Message-----
> From: Alex Glikson [mailto:GLIKSON at il.ibm.com]
> 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 <oomichi at mxs.nes.nec.co.jp>
> To:        "OpenStack Development Mailing List (not for usage questions)" <openstack-dev at lists.openstack.org>,
> 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?"
> 
> 
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