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AstroGrid Framework

AstroGrid Framework. Consortium meeting, Dec 14-15, 2004 Edinburgh. Tony Linde Programme Manager. A little bit of history…. Dec 2001. Jan 2003. Jul 2003. Nov 2003. May 2004: Planning for AG2. Now for some component reuse…. AstroGrid Posters at ADASS. Portal and Workflow

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AstroGrid Framework

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  1. AstroGrid Framework Consortium meeting,Dec 14-15, 2004Edinburgh Tony LindeProgramme Manager

  2. A little bit of history… AstroGrid Consortium Meeting: Project Framework

  3. Dec 2001 AstroGrid Consortium Meeting: Project Framework

  4. Jan 2003 AstroGrid Consortium Meeting: Project Framework

  5. Jul 2003 AstroGrid Consortium Meeting: Project Framework

  6. Nov 2003 AstroGrid Consortium Meeting: Project Framework

  7. May 2004: Planning for AG2 AstroGrid Consortium Meeting: Project Framework

  8. Now for some component reuse… AstroGrid Consortium Meeting: Project Framework

  9. AstroGrid Posters at ADASS • Portal and Workflow • AstroGrid and the Registry: Enabling Resource Discovery • Access Control in AstroGrid software • The AstroGrid Common Execution Architecture • The Publisher's AstroGrid Library AstroGrid Consortium Meeting: Project Framework

  10. Portal and Workflow • Supports workflow paradigm (from the simple to the complex) • Queries and workflows are designed using the portal • Work is run remotely and asynchronously • Archives searched and results manipulated • Results are stored in a virtual file system • Queries and workflows can be re-used and shared AstroGrid Consortium Meeting: Project Framework

  11. Enabling Resource Discovery • Types of Registries:– Full, Publish, Special • Registry is the main focal point for all Astrogrid components • Agreed Standards with IVOA • Search and harvest interface • OAI standard for harvest interface • Adheres to the Astrogrid CEA standard • Types of resource • Generic services, web services, applications, … • Data collections • AstroGrid-specific resources (e.g. MySpace servers) • Use of XQuery language with eXist XML database. • Harvesting • US NVO • VizieR AstroGrid Consortium Meeting: Project Framework

  12. Access Control • AstroGrid has taken the lead in AAA because our system is based on writable storage • Implement single-sign-on (SSO) authentication • Using a community service (so, account can be used with a number of portals or other UIs) • Programme-to-programme authentication based on message security with SOAP headers and WS-Security • Facade API to hide details from implementations • Underneath, use JAX-RPC/Axis handlers to secure messages. • Little authorization support in 2004, more in 2005 • groups, quotas, community authorization, file sharing • Currently specific to AstroGrid • Working with IVOA to design and adopt a common standard AstroGrid Consortium Meeting: Project Framework

  13. Common Execution Architecture • Uniform interface for running applications in VObs • Set of WSDL and schema • Define the interactions in language independent way • Adapters (ExecutionControllers) implemented • Using Java Web services • To run legacy command-line applications • To run legacy HTTP GET/POST apps within the framework • ExecutionControllers • Allow asynchronous operation of the applications • Callback and polling mechanisms for delivery of results • Tightly integrated with JES (Job Execution System) • Allows programmable workflows AstroGrid Consortium Meeting: Project Framework

  14. Publisher's AstroGrid Library • Task: What's involved in publishing data to the VO? • Library of components • Make a data owners life a (relatively) straight-forward transition to a data owner/publisher • Variety of ‘plugins’ • Cope with different collections of data (modes of storage) • To make life easier for installers • and test how they might be presented to the VO • Ready-made web UI • Suitable for astronomers to use, • Includes useful configuration & monitoring features • VO-compatible interfaces for tools to access the data • Features to communicate with other VO services • E.g. Registries AstroGrid Consortium Meeting: Project Framework

  15. If you want to know more about… • Portal and Workflow • AstroGrid and the Registry: Enabling Resource Discovery • Access Control in AstroGrid software • The AstroGrid Common Execution Architecture • The Publisher's AstroGrid Library • Jeff Lusted • Kevin Benson • Guy Rixon • Paul Harrison • Martin Hill AstroGrid Consortium Meeting: Project Framework

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