Hello, Joe,

Thank your encourage and good suggestion. That means this thread is a good 

So if anyone has any doubts about OpenStack cascading, please following this 
thread, so that we can colloect all things could not be solved in the mail, and 
then discussed in the design summit session.

Best Regards

Chaoyi Hunag ( joehuang )

From: Joe Gordon [joe.gord...@gmail.com]
Sent: 01 October 2014 2:06
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [all] [tc] Multi-clouds integration by OpenStack 

On Tue, Sep 30, 2014 at 6:04 AM, joehuang 
<joehu...@huawei.com<mailto:joehu...@huawei.com>> wrote:
Hello, Dear TC and all,

Large cloud operators prefer to deploy multiple OpenStack instances(as 
different zones), rather than a single monolithic OpenStack instance because of 
these reasons:

1) Multiple data centers distributed geographically;
2) Multi-vendor business policy;
3) Server nodes scale up modularized from 00's up to million;
4) Fault and maintenance isolation between zones (only REST interface);

At the same time, they also want to integrate these OpenStack instances into 
one cloud. Instead of proprietary orchestration layer, they want to use 
standard OpenStack framework for Northbound API compatibility with HEAT/Horizon 
or other 3rd ecosystem apps.

We call this pattern as "OpenStack Cascading", with proposal described by 
[1][2]. PoC live demo video can be found[3][4].

Nova, Cinder, Neutron, Ceilometer and Glance (optional) are involved in the 
OpenStack cascading.

Kindly ask for cross program design summit session to discuss OpenStack 
cascading and the contribution to Kilo.

Cross program design summit sessions should be used for things that we are 
unable to make progress on via this mailing list, and not as a way to begin new 
conversations. With that in mind, I think this thread is a good place to get 
initial feedback on the idea and possible make a plan for how to tackle this.

Kindly invite those who are interested in the OpenStack cascading to work 
together and contribute it to OpenStack.

(I applied for “other projects” track [5], but it would be better to have a 
discussion as a formal cross program session, because many core programs are 
involved )

[1] wiki: https://wiki.openstack.org/wiki/OpenStack_cascading_solution
[2] PoC source code: https://github.com/stackforge/tricircle
[3] Live demo video at YouTube: https://www.youtube.com/watch?v=OSU6PYRz5qY
[4] Live demo video at Youku (low quality, for those who can't access 
[5] http://www.mail-archive.com/openstack-dev@lists.openstack.org/msg36395.html

Best Regards
Chaoyi Huang ( Joe Huang )
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