[Pgi-wg] PGI State Model for discussions : PPT from Morris and PDF from Aleksandr

[Oxana Smirnova]

Hi,

I agree with Etienne's judgement; I also have a comment on the 
Pre-processing (and possibly Post-processing) state: like Aleksandr 
wrote in his comments to the graph, these may be complex states 
themselves, indeed.

Just few days go an ARC developer came with an idea to create a new 
(sub)state for stage-in re-tries, but we so far resisted and convinced 
him to "hide" re-tries in the same state. It may well turn out that it 
still will be useful to have a distinct state for this use case. And I 
wouldn't deem it implementation-specific, as it is very feasible to 
assume that every implementation will have 0..n retries.


Cheers,
Oxana

22.05.2009 19:36, Etienne URBAH пишет:
> Morris, Aleksandr and All,
>
> Concerning the OGF PGI State Model :
>
> Many thanks to Morris and Aleksandr for your proposals.
>
> We NOW have a sound technical basis permitting relevant discussion
> permitting to achieve agreement.
>
> Visibly, PGI requirements are much more complicated than anything
> reasonably achievable with the State Models presented inside BES
> (GFD.108) and HPC File Staging Profile (GFD.135), even with substates.
>
>
> Personally, even if that would break the current BES recommendation, I
> would prefer that all states (including D and H) are full states, in
> order that all transitions have precise names.
>
>
> Using the State Model of Aleksandr (which I like very much), we should
> be able to describe that 'Automatic Staging' and 'Manual Staging' can
> occur simultaneously.
>
> Example for simultaneous Stage-in :
>
> - As soon as the 'Execution Service' knows the Stage-in location (when
> the job is 'Pending' or 'Pre-Processing'), the 'Execution Service' sends
> the URL of the Stage-in location to the job submitter.
>
> - Automatic and Manual Stage-in can occur simultaneously inside
> 'Pre-processing'.
>
> - If Automatic finishes first, the job goes to 'Pre-processing:D:H', and
> when Manual finishes, the job can go to 'Delegated',
>
> - If Manual finishes first, the job stays inside 'Pre-processing', and
> when Automatic finishes, the job can go to 'Delegated'.
>
>
> So, I confirm that the State Model of Morris is a subset of the State
> Model of Aleksandr, with following tentative correspondence :
>
> Morris Aleksandr
> ------ ---------
> Created:Submitted Pending
> Created:Restarted Pending
> Pending Pending:D
> Running:Auto-Stage-in Pre-processing
> Created:Hold (Manual Stage-in) Pre-processing and Pre-processing:D:H
> Running:Executing Delegated
> Running:Hold Delegated:H
> Running:Auto-Stage-out Post-processing
> Finished:Manual-Stage-out Post-processing and Post-processing:H
> Finished Success
> Canceled (Terminated) Canceled
> Failed Failed-Recoverable and Failed
>
>
> I hope that everyone will make his/her own mind, ask questions, proposes
> clarifications, and helps the PGI State Model to become an stable agreed
> specification, leading to an OGF recommendation.
>
> Best regards.
>
> -----------------------------------------------------
> Etienne URBAH LAL, Univ Paris-Sud, IN2P3/CNRS
> Bat 200 91898 ORSAY France
> Tel: +33 1 64 46 84 87 Skype: etienne.urbah
> Mob: +33 6 22 30 53 27 mailto:urbah at lal.in2p3.fr
> -----------------------------------------------------
>
>
> On Fri, 22 May 2009, Aleksandr Konstantinov wrote:
>> On Friday 22 May 2009 12:49, Morris Riedel wrote:
>>> Hi PGI team,
>>>
>>> as we discussed in going forward by discussing the state model I
>>> tried to
>>> sketch a first version inside the powerpoint file I put on GridForge:
>>>
>>> http://forge.gridforum.org/sf/go/doc15637?nav=1
>>>
>>>
>>> Feel free to use it and make your changes that make it easier to
>>> discuss it
>>> in the next telcons / per mailing lists.
>>
>> I have tried to draw a diagram similar to one we are having in ARC but
>> extended a bit with possible use-cases I could think about. I think it
>> makes superset of your diagram.
>>
>>
>> A.K.
>>
>>
>>> I also put related work about other state models inside it (HPC-FSP &
>>> BES).
>>>
>>> Note that I created a sub-folder called state-model inside the Execution
>>> Service folder for it.
>>>
>>> Finally, there are certainly some transitions/states that have to be
>>> discussed (i.e. sub-states hierarchy), but this version might be a good
>>> start.
>>>
>>>
>>> Let's start with the discussion then,
>>> Morris
>>>
>>> ------------------------------------------------------------
>>> Morris Riedel
>>> SW - Engineer
>>> Distributed Systems and Grid Computing Division
>>> Jülich Supercomputing Centre (JSC)
>>> Forschungszentrum Juelich
>>> Wilhelm-Johnen-Str. 1
>>> D - 52425 Juelich
>>> Germany
>>>
>>> Email: m.riedel at fz-juelich.de
>>> Info: http://www.fz-juelich.de/jsc/JSCPeople/riedel
>>> Phone: +49 2461 61 - 3651
>>> Fax: +49 2461 61 - 6656
>>>
>>> Skype: MorrisRiedel
>
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