[rm-wg] [occi-wg] OCCI MC - State Machine Diagram

[David Snelling]

Folks,

I write this note as a fellow OGF working group chair. In the  
Reference Model working group we have been working toward a Reference  
Model, which includes a life cycle state model.  Please have a look at  
the sections in our draft document that pertain to life cycle and see  
if you can map your states sensibly onto/into these.

The idea is that your states, which map directly, are aliases for  
those in the Reference Model. Any of yours that don't map directly,  
should be sub-states of one from the reference model.

If this is not possible, please let us know. Ours is a work in  
progress, so it is possible that there are faults in our model.

Please come talk to us at OGF26.

See: http://forge.gridforum.org/sf/go/doc14766?nav=1


On 18 Apr 2009, at 12:40, Sam Johnston wrote:

> Afternoon all,
>
> I have created a diagram (attached) of what I think the absolute  
> minimum core states need to be... essentially boiling them down to  
> "STOPPED" and "ACTIVE" with "START" and "STOP" being the only  
> requisite actuators. Transitional "STOPPING" and "STARTING" states  
> are optional.
>
> I believe states should be completely unambiguous so I don't  
> particularly like the DMTF model ("stopped" and "active" machines  
> are also "defined" but this is a separate state) and that also rules  
> out vague terminology like "inactive" (which could mean both  
> "stopped" and "suspended").
>
> I've got an optional RESTART actuator which takes you from "ACTIVE"  
> to "STARTING" as well as an optional "SUSPEND" and "RESUME" cycle  
> which takes you via the transitional "SUSPENDING" and "RESUMING"  
> states between "ACTIVE" and "SUSPENDED".
>
> DMTF have another "paused' state but I wonder whether this needs to  
> be a state in its own right or if it's an attribute of "suspended".  
> That's a rhetorical question - we could spend all week discussing  
> nuances but for now I want to make sure we agree on the absolutely  
> minimalist core functionality. Other states can be added via a live  
> registry which we can pre-populate with a view to guiding innovation  
> without stifling it.
>
> This has been uploaded to the wiki: http://forge.ogf.org/sf/wiki/do/viewPage/projects.occi-wg/wiki/StateModel
>
> Sam
>
> <OCCI MC State Machine.png><OCCI MC State  
> Machine.svg>_______________________________________________
> occi-wg mailing list
> occi-wg at ogf.org
> http://www.ogf.org/mailman/listinfo/occi-wg

Take care:

     Dr. David Snelling < David . Snelling . UK . Fujitsu . com >
     Fujitsu Laboratories of Europe Limited
     Hayes Park Central
     Hayes End Road
     Hayes, Middlesex  UB4 8FE
     Reg. No. 4153469

     +44-7590-293439 (Mobile)






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