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Data Integration

Data Integration. Chaitan Baru Ilya Zaslavsky Ashraf Memon Michalis Petropoulos Yannis Papakonstantinou Bertram Ludaescher San Diego Supercomputer Center. GEON IT Activities. “Two-tier” approach to bringing IT to scientific applications Provide state of the art IT infrastructure

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Data Integration

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  1. Data Integration Chaitan Baru Ilya Zaslavsky Ashraf Memon Michalis Petropoulos Yannis Papakonstantinou Bertram Ludaescher San Diego Supercomputer Center

  2. GEON IT Activities • “Two-tier” approach to bringing IT to scientific applications • Provide state of the art IT infrastructure • Identify and address new IT research • Short term targets (~1 year) vs. long-term strategy (3year, 5year) • IT Working Groups • Concept Spaces and Semantic Mediation • Tools and services • “Core” Grid Services • “Shared cybertools” • OGSA stack, authentication, data discovery, data integration, data replication… • Application Services • Geoscience “domain cybertools” • Advanced Visualization

  3. Data Integration • Database integration • Based on “join” operation in relational databases (e.g. SSN, city name, …) • Integrating layers in a single GIS (“spatial joins”) • Semantic integration • Linking data via concept spaces • Domain Model-based integration • Linking data via computational models • E.g., “respatialization”

  4. SDSC Grid-enabled Mediation Services(GeMS) • Registration/Discovery • “Situate” a data source in 4D, topic, and process space. Describe source capability. • Federation/Access • Provide standard interfaces to access data • Define integrated views • Publication • Move data from “private space” to “public space”, or provide a “public view” of private data • Replication / Caching • Allow for replication/caching of data (at different granularities)

  5. Leverage on-going efforts • Open Grid Services Architecture (OGSA) • Data Access and Integration: Grid Database Service (GDS) • IBM Grid Services • E.g., Grid data Movement and Replication • SDSC Storage Resource Broker (SRB)

  6. Result Assembly query Wrapper Replicas Wrapper Wrapper Wrapper Wrapper Wrapper Published Data Private Data Published Data Private Data Published Data Private Data Published Data Private Data Published Data Private Data GeMS Scenario Client • Query-based access • 3rd-party transfer Surf Query Planner Mediator Surf Plan Surf Logical  Physical Query Plan “binding” Wrapper Ontology Service(s)

  7. GeMS Components • Query Planner • Logical Query Plan to Physical Query Plan Resolver • Replica selection • Dealing with failover • QoS…

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