[Nsi-wg] New state machine with two phase reserve and modify

[Chin Guok]

Hi Henrik,

Actually the IDCP has a single phase reservation workflow.  That is the 
reason why it explicitly only supports the chain model.  The 
provisioning workflow however is more like a two-phase comment.  It was 
initially a single phase commit, but was redesigned to better support 
the auto-timer triggered provisioning.

I'm just say'in :)

- Chin
On 7/4/12 5:20 AM, Henrik Thostrup Jensen wrote:
> Hi
>
> On Mon, 2 Jul 2012, John MacAuley wrote:
>
>> Here is the new and improved NSI CS state machine fresh off the 
>> presses and ready for your viewing pleasure.  Please study it and 
>> prepare questions for the Wednesday call.
>
> I missed the call last week (because I love sitting in airplanes), but 
> could you please explain why we need two phase reserve? (and modify as 
> well though that one makes more sense).
>
> IDCP have two phase ... everything (more or less), and the main result 
> of this was that the implementations became extremely complex and 
> error handling even worse (often lacking).
>
> Two phase looks really nice from a distance. Until you are in the 
> middle of it and there are crying babies and bleeding people 
> everywhere :-).
>
>
>     Best regards, Henrik
>
>  Henrik Thostrup Jensen <htj at nordu.net>
>  Software Developer, NORDUnet
>
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