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Data Integration

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(GeMS) Registration/Discovery 'Situate' a data source in 4D, topic, and process space. ... GeMS Components. Query Planner. Logical Query Plan to Physical Query ... – PowerPoint PPT presentation

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Title: Data Integration


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
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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