[ogsa-wg] Teleconference minutes - 17 August 2006

[Hiro Kishimoto]

Hi Andreas,

 >   AI-0817c: Andreas will talk with Hiro about getting a 1-2 hour slot
 >             on Thursday. It is important to know early next week---by
 >             the Monday (8/21) call.

Tentatively, I've put this agenda item to Thursday schedule.
Let's discuss and decide at upcoming Monday call.

https://forge.gridforum.org/sf/go/wiki1555?nav=1

Thanks,
----
Hiro Kishimoto

Andreas Savva wrote:
> Attached.
> 
> https://forge.gridforum.org/sf/go/doc13745?nav=1
> 
> 
> ------------------------------------------------------------------------
> 
> OGSA Teleconference - 17 August 2006
> ====================================
> 
> * Participants
> 
>   Jay Unger (IBM)
>   Jem Treadwell (HP)
>   Ellen Stokes (IBM)
>   Andreas Savva (Fujitsu)
>   Darren Pulsipher (EMC)
>   Allen Luniewski (IBM)
>   Chris Jordan (SDSC)
>   Donal Fellows (Uom)
>   Michel Drescher (Fujitsu)
>   Stephen Davey (NESC)
>   Dave Berry (NESC)
> 
>   Minutes: Andreas Savva
> 
> * Summary of Actions
> 
>   AI-0817a: Dave Berry and Jay Unger will approach groups (GIN,
>             Globus, etc) that have implemented practical grids and
>             start a discussion on how they handle data:
>             - how data is treated as a resource that can be scheduled
>             - how transfers are modeled
>             - how files are advertised
>             - how applications find files (query, by knowledge,?)
> 
>   AI-0817b: Stephen Davey will do a cut down parameter sweep scenario
>             focusing on the JSDL+BES+Data Transfer/Staging service
> 
>   AI-0817c: Andreas will talk with Hiro about getting a 1-2 hour slot
>             on Thursday. It is important to know early next week---by
>             the Monday (8/21) call.
> 
> * Aug 10 minutes - not available
> * Aug 14 minutes - approved with no changes
> * July F2F minutes - Roadmap - approved with no changes
> 
> * Review of Actions
> 
>   AI-0803a: Hiro to look into an option for a second EMS/Data call
>             on Sep 7. Tentative; needs confirmation with likely
>             participants.
> 
>             - Agreed to schedule this for Aug.31, preferably in the
>               second part of the call. 
>             - Data will provide updates (if any) from their F2F at the
>               end of August.
>            
>   AI-0803c: Ellen to book the IBM facility on Thursday afternoon
>             - Done.
> 
>   - Andreas and Hiro to revise the EMS scenario document
>     (i.e. examples) so that proposal 2 is fulfilled
>     + Andreas will merge Hiro's updates into the next draft
>     - Done
> 
>   - Steve McGough & Andreas to do a mapping from the current JSDL
>     elements / terminology into the new information model structure
>     (Proposed split into Description and Requirements) (from July 18th
>     F2F, postpone until Aug. 17)
>     - By GGF18 as original discussed.
> 
> * OGSA Information Model and Data
> 
>   Ellen gave an overview of the Information Model work.
> 
>   - Slide 6 shows a middle abstract model. But it might be the case
>     that different abstract model might be necessary for different
>     purposes. One example in Data is where the information for
>     discovery may be different than that for scheduling.
>   - Implementation could be a (set of) XML document(s) or a
>     database. And XQuery is supported by DBs as alternative to ODBC
>     etc
>   - Slide 11 shows a symmetric model. Expressing and matching between
>     resource requirements and job capabilities may involve
>     policy---there are many standards that may be applicable but the
>     group has not worked through them yet.
>   - For Data there are a number of open questions around the idea of
>     different models for discovery vs scheduling. What are the
>     interesting properties for Data scheduling?  What information is
>     needed for modeling and at what level of abstraction?
>     - Agreed that there needs to be an effort to tackle the scheduling
>       issue between EMS and Data
>     - Data has so far mostly focused on access rather than
>       scheduling. For example, issues with data availability on the
>       network, or performance characteristics are not modeled
>       - What are the necessary abstractions for these? (fast data,
>         available, ...?) 
>     - There are a number of groups that should be consulted to get a
>       better idea of current practice (GIN,Globus,etc). The impression
>       is that the state of the art is
>       - a metadata catalog---what is available
>       - a replica catalog---abstract filename to physical location
>       - choice of what to use is up to application
> 
>   AI-0817a: Dave Berry and Jay Unger will approach groups (GIN,
>             Globus, etc) that have implemented practical grids and
>             start a discussion on how they handle data:
>             - how data is treated as a resource that can be scheduled
>             - how transfers are modeled
>             - how files are advertised
>             - how applications find files (query, by knowledge,?)
> 
>   - The Data group is also thinking about a file metadata definition
>     (something like the information retrievable from a POSIX stat())
>     - CIM has existing work on files and Ellen can help out
> 
> * Common Data/EMS Scenarios
> 
>   Data has a set of scenarios describing services that interact with
>   EMS. For example, the parameter sweep scenario. EMS also has some
>   expectations, for example that a data staging description from a
>   JSDL document will be correctly processed by some data transfer
>   service---even though that service may not be described further. So
>   it would be useful to have a set of common scenarions describing
>   basic common activities, making sure that the overlap is checked and
>   the interaction between Data and EMS services is done consistently.
> 
>   Agreed that a good first candidate scenario is simple job execution
>   with data staging. In particular the combination of JSDL, BES, Data
>   transfer service (DMI based?).
> 
>   AI-0817b: Stephen Davey will do a cut down parameter sweep scenario
>             focusing on the JSDL+BES+Data Transfer/Staging service
> 
>   The aim is to discuss it at least within Data at the Data F2F (Aug
>   28-30 @Edinburgh) and with EMS at GGF18. Since many Data members
>   will be leaving on Thursday it would be good to arrange some time
>   early on Thursday (OGSA F2F).
>   - Confirmed that a number of people from EMS on the call (Donal,
>     Andreas) will be at the F2F.
> 
>   AI-0817c: Andreas will talk with Hiro about getting a 1-2 hour slot
>             on Thursday. It is important to know early next week---by
>             the Monday (8/21) call.