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From Service Markets to Service Economies – An infrastructure for protocol-generic SLA negotiations

From Service Markets to Service Economies – An infrastructure for protocol-generic SLA negotiations. Dagstuhl Seminar on Service Level Agreements in Grids 22. – 27. 03. 2009 Sebastian Hudert. Outline. Vision: Service Economies Internet of Services Service Markets

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From Service Markets to Service Economies – An infrastructure for protocol-generic SLA negotiations

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  1. From Service Marketsto Service Economies – An infrastructureforprotocol-generic SLA negotiations Dagstuhl Seminar on Service Level Agreements in Grids 22. – 27. 03. 2009 Sebastian Hudert

  2. Outline • Vision: Service Economies • Internet of Services • Service Markets • Service Economies • Research Goal • A protocol-generic SLA negotiationinfrastructure • Open Questions

  3. Internet of Services (1) • Grid Computing: • Dynamic sharingandcoordinationof resources not subjecttocentralcontrol, delivering „nontrivialqualities of service“ (Foster2002) • Cloud Computing: • Dynamic provision of inter-connectedandvirtualizedcomputerson demand(Buyya2008) • Enterprise SOA • Variety of singleapplicationsorcomplexworkflowservicesareofferedover an intra- and inter-companynetwork • Elaborate businessapplicationsareimplementedasworkflowsoverthesesimple andcomplexservices

  4. Internet of Services (2) • Common Vision: Internet of Services  Service Orientation • Distributed Service Systems • Services asbasicbuildingblocksformorecomplexApplications/Workflows  Decentral Systems • (Almost) nohierarchicalcontrol • Open, decentrallymanagedsystems cross-organizationalsetting • Value-added Services based on Service Orchestration

  5. Outline • Vision: Service Economies • Internet of Services • Service Markets • Service Economies • Research Goal • A protocol-generic SLA negotiationinfrastructure • Open Questions

  6. Commercial service-based Systems:Towards Service Markets • Service Markets • IoSapplication in a commercialcontext Need forQoSguarantees • Cross-organisational setting • Need fordecentralcoordination • Need for a sharedcommunicationlanguage • Idea: usage of socio-economicmechanismstoimplementefficientservice-basedsystemacross organisational boundaries • Service Level Agreements • electronic Negotiations

  7. Efficient Ressource Allocation:Service Markets • Research questionsconcerning Service Markets: Efficiency of economicself-organisationapproaches forcoordinating Service Markets CATNETS Development of methodsandtoolsfor an efficient, market-based resourceallocationsystemaimingatthe end user SORMA Investigation of reputationandtrustmodelsfor a more efficientpartnerselection in Service Markets eRep

  8. Outline • Vision: Service Economies • Internet of Services • Service Markets • Service Economies • Research Goal • A protocol-generic SLA negotiationinfrastructure • Open Questions

  9. Next Step:Service Economies (1) • EconomicTheory: • Different marketsituationsdemanddifferent negotiationprotocolstoreachthehighest-possibleoverallefficiency. • Computer Science: • Currentsystemsaregenerallybased on thesame communicationinfrastructure(Web Services, SOAP etc.) • However, on a higherlevel individual marketsmostlyemployonlyoneparticularprotocol (aimingattherespectivesetting?). • But whatifserviceconsumersrequireservicesthatare not available on themarket / thesytemtheyareimplementedfor? • e. g. for innovative anddynamicbusinessprocesses

  10. Next Step: Service Economies (2)

  11. Next Step:Service Economies (3) Service Economy Service Market I Service Market III Service Market II

  12. Outline • Vision: Service Economies • Internet of Services • Service Markets • Service Economies • Research Goal • A protocol-generic SLA negotiationinfrastructure • Open Questions

  13. Research Goal (1) • Research Question: Is itpossibletoincreasetheoverallefficiency of an SLA managementlayer in currentIoSsettingsbyintroducing an agent-based, protocol-genericnegotiationinfrastructureandthus an Economy of Services? • To what extent can such an infrastructure increase flexibility of the overall system? • How robust is such an infrastructure?

  14. Research Goal (2) • SLA-basedQoS Management  Need forIoS/SE Infrastructures directlysupporting theoverall Service Lifecycle • Focus: • (Discovery and) • Negotiation Phase

  15. Outline • Vision: Service Economies • Internet of Services • Service Markets • Service Economies • Research Goal • A protocol-generic SLA negotiationinfrastructure • Open Questions

  16. Service Economy Infrastructure:Architecture Design • Abstract Design Idea:

  17. Management vs. Service Layer • Negotiationcomponents (Management Agents) arepart of a general Service Management Overlay Network • Analogy: Agreement and Service Layer in WS-Agreement WS-Agreement Architecture (Andrieux2005)

  18. Infrastructure Components • Negotiation Protocol Description Language • Set of protocol primitives supporting • thediscovery of therespective SLA templatesandnegotiationprotocoldescriptions • a flexible negotiationphase (conductedaccordingtotheprotocoldescriptiondiscovered)

  19. Protocol Description - Datamodel

  20. Protocol Primitives • Idea: • Role-basedinterfacedefinitionsfor • Service Providers • Consumersand • Intermediaries (implementing a system of lookupand/orauctionservers) • supportingthe • Discovery Process(requestingorproposing of, pub/subfunctionalityforprotocoldescriptions etc.) • NegotiationProcess(postingoraccepting/rejectingbids etc.) • ActualNegotiationProcess will followthespecificationsstated in thediscoveredprotocoldescriptiondocument.

  21. Outline • Vision: Service Economies • Internet of Services • Service Markets • Service Economies • Research Goal • A protocol-generic SLA negotiationinfrastructure • Open Questions

  22. Open Questions • Whichmarketconfigurations (in terms of serviceconsumers, providersand intermediaries) arepresent in current Service Markets? • How do currentlyused SLAs looklike? Towhatextendcaneconomictheoryprescribefittingnegotiationprotocolsforthese different „products“? • Whichmetricsareapplicablefor such settings? Howcaneconomicefficiencyandinfrastructuralflexibilitybemeasured? • …

  23. Thankyouforyourattention! Anyquestions? Sebastian Hudert Department of Information Systems Management University of Bayreuth sebastian.hudert@uni-bayreuth.de

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