© 2007 Open Grid Forum

OGF21, SeattleOctober 16 　‘０７Wolfgang Ziegler wolfgang.ziegler@scai.frainhofer.dePhilipp Wieder philipp.wieder@udo.edu

GRAAP-WG Sessions

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Sessions planned

• GRAAP #1, October 16, 9 am - 10:30 am• Session focussing on discussion on Implementation &

Interoperability - state and issues

• GRAAP #2, October 16, 11 am - 12:30 am• Discussion on term language issues

• GRAAP #3, October 16, 1:30 pm - 3:00 pm• Discussion of WS-Agreement Negotiation

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Agenda GRAAP #1

Session focussing on discussion on Implementation & Interoperability - state and issues

• Agenda bashing

• Wrap up since last OGF

• GRAAP infrastructure (mailing list, wiki) experience made with the wiki what should we use for which purpose

• Implementation & interoperability: state, issues, next steps, definitions of milestones

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Wrap up since last OGF

• Discussions on the mailing list on Negotiation issues

• Updating the Wiki• Improved structure, more content

• Survey on Usage of SLAs for Resource Management and Scheduling• Extended version available as CoreGRID Technical Report TR-0096• WS-Agreement implementations in the Wiki

• Grid 2007 Workshop on Usage of Service Level Agreements in Grids

• Meeting of several GRAAP members during Grid 2007• Planning of work on interoperability to be done before OGF21

• Work on interoperability between CCS and MSS

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GRAAP infrastructure

• Experience made with the wiki

• What should we use for which purpose

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Implementation & interoperability

• State • Oliver, Dominic to report

• Issues• Oliver, Dominic to report

• Next steps• Document describing the interoperability scenarios and the level of interoperability

(will be submitted to the OGF document process). • Structure & outline should be ready after OGF20

Should be done today

• Writing tea

• Definitions of milestones• Time needed to run the two WS-Agreement implementatiions against each other• Contribution to GIN at SC2007?

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Agenda GRAAP #2

Discussion on term language issues

• Agenda bashing

• Collaboration/Synchronising with JSDL developments like JSDL next version/extensions

• Microspecs for Network, Licenses, KPI

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Implementation/Interoperability discussion

WSRF (base faults, resource properties) and WSA are critical: different versions & different support in hosting environments

Name spaces are differentLevel of interoperabillity to achieve?

Schema level, minimal set of terms for “hello world”

create document describing the interoperability scenarios that will be submitted to the OGF document process. Structure & outline should be ready after OGF20

Oliver, Wolfgang, Dominic, Omer -> time tbd in the break after GRAAP #3

GT4 expected to migrate to the newest version of WSRF & WSA, but no schedule available on the website -> contact Globus Alliance people during OGF20

Template generation

Repository or dynamic on demand

How to create an ID for a template from a repository -> static ID

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Implementation/Interoperability discussion 2

Similarities in the AssessGrid and VIOLA implementation could be used for first tests on the functional aspects, SORMA to contribute

SDTs in common? Based on JSDL, should work, guarantee termshowever are completely different

BEinGrid: most probably based on (modified) WS-Agreement

NextGRID: similar protocol but different language

TrustCom

GridTrust

Organise a telecon with these projects, after restructering the google doc

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Use-cases for dynamic SLAs and negotiation

1) How to create Agreements to minimise negotioation (e.g. using constraints, functions) needed to converge

2) How to re-negotiate an existing agreement, both client and provider drivenCould become difficult when there are conflicting partiesProbably dependent on the “cost” of re.negotiation

Optimistic and pessimistic scenarios, recovering from failure or offering more service to the userSLAs for optimising flops per watt (evolving use case: Intel study, SwissGrid)

Are dynamic SLA useful? In a Grid with some economic model below: yesIf not all requirements could be fulfilled during the initial creation of the SLA and the service

provider laster has additional resources/capabilitiesNetwork providers: Ipsphere plans to use OGSA protocols, WSRF, objective: automatic

negotiation of SLAaOGSA session on SLTs for ByteIO and BES 4pmTo start work on negotiation begin with 1) and extend to 2) laterCreation constraints to indicate fixed/negotiable termsProvide protocols for bilateral negotiation to select fromSurvey on protocols? Shamima will send a paper of 2002Toshi tp provide a very simple micro spec for 2)Omer to provide something on 1) after OGF21

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Agenda GRAAP #3

Discussion of WS-Agreement Negotiation

• Agenda bashing

• Discussion of work done and existing approaches• Presentation of current work by Michael Parkin• Work presented in previous workshops

• Selection of use-cases

• Discussion and agreement on paperwork to start, contents and main writers

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Discussion of work done and existing approaches

• Presentation of current work by Michael Parkin

• Work presented in previous workshops• Need to select relevant contributions and to extract approaches first

• Work received recently from Sebastian Hudert• A Proposal for a Web Services Agreement Negotiation

Protocol Framework

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Selection of use-cases

Some are in the Wiki:• Neotiation of resource availability

– VIOLA/PHOSPHORUS use case

• Re-negotiarion– Reserving More Resources

– Extension of Agreement Expiration Time

– Asking for Releasing Resources which had been Agreed Upon

Should also have a section on use-cases where negotiation makes less or no sense

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Paperwork to start now

• Discussion and agreement on paperwork to start, contents and main writers