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From Doug Davis <>
Subject Re: DeltaCloud API and CIMI
Date Thu, 03 May 2012 16:58:29 GMT

Just FYI.

STSM |  Standards Architect  |  IBM Software Group
(919) 254-6905  |  IBM 444-6905  |
The more I'm around some people, the more I like my dog.

Carlos Gonçalves <> 
05/03/2012 12:32 PM
Please respond to


Re: DeltaCloud API and CIMI

Hi Dies,

I did not mean the API between IaaS providers and DeltaCloud because I 
don't see providers such as Amazon EC2 supporting CIMI at least in the 
sort run, but the API DeltaCloud users use to communicate with DeltaCloud 
abstracting themselves from each IaaS provider own API.

If CIMI gets really spread I guess some IaaS software projects, 
open-source mainly, will start supporting CIMI, either as their only 
available API or as an secondary API. For instance, there is a working 
group adding OCCI support on OpenStack[1]. While some providers may opt to 
offer a standard cloud API (OCCI or CIMI) to their services, others just 
won't because that would somehow mean easing interoperability with 
competitor cloud vendors, giving up of their vendor lock-in strategy and 
hence loosing money - that's my point of view :-)

So, no, I don't see DeltaCloud getting obsolete, ever (?).

Hope I've answered all your questions. If not, please let me know and I'll 

Carlos Goncalves


On 3 May 2012, at 14:14, Koper, Dies wrote:

> Hi Carlos,
> I wonder how many cloud providers will support the CIMI API.
> If all DMTF members will support it, wouldn't that render DC obsolete?
> If few DMTF members will actually support it, what is the real benefit 
to users for DC to be CIMI -only?
> Are you assuming it will take a long time for the members to release 
their respective CIMI implementations (as it took them a long time to 
publish the standard) and DC's objective should be to bridge that period?
> Regards,
> Dies Koper
>> -----Original Message-----
>> From: Carlos Gonçalves []
>> Sent: Thursday, 3 May 2012 8:48 PM
>> To:
>> Subject: DeltaCloud API and CIMI
>> Dear all,
>> As suggested by Marios on IRC the other day, I'm opening here a new
>> thread for max discussion on the subject of the future of DeltaCloud in
>> terms of APIs available to the user. The question is short, though I 
>> complex and perhaps political answers due to the nature of the topic.
>> Currently DeltaCloud supports two APIs: its own API and CIMI API. They 
>> not interoperable between them, and neither have been standardized yet.
>> CIMI is just a step away from being officially released as a first 
final version
>> (1.0.0) cloud standard by DMTF, where DeltaCloud API has not yet even
>> been proposed to be one as far as I know.
>> Until very recently I though CIMI support on DeltaCloud was somewhat a
>> trivial and an "automagically" translation from/to DeltaCloud API but 
>> been proven to mistaken when I gave Marios' new OpenStack v2 driver a
>> spin using CIMI. This led me to question of whether DeltaCloud should
>> support both APIs or just focus on just one, with CIMI being the most
>> logical model and interface to be adopted rather DeltaCloud's own.
>> I believe the possible move to CIMI-only would bump the project 
>> but would require a major code rewritten, I suppose.
>> So, thoughts on this? :-)
>> Regards,
>> Carlos Goncalves

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