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VLAM-G Architecture & VIMCO Integration

VLAM-G Architecture & VIMCO Integration. CO-IM Group & AM Group VLAM-G Meeting July 3, 2001. Outline. Architecture A simple scenario for a MACS study Information management in VLAM-G Implementation. 4-tier Architecture. Science portals. client tier.

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VLAM-G Architecture & VIMCO Integration

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  1. VLAM-G Architecture &VIMCO Integration CO-IM Group & AM Group VLAM-G Meeting July 3, 2001

  2. Outline • Architecture • A simple scenario for a MACS study • Information management in VLAM-G • Implementation

  3. 4-tier Architecture Science portals client tier Web server and supporting functionality Web tier VLAM-G generic functionality, application specific functionality application server tier Data / information resources, hardware resources,… resource tier

  4. Architecture - Components Front-End client tier Web application servers Web server Authentication server Web tier RTS VIMCO Server Session manager Processing modules application server tier VLAM-G archive Linux cluster CAVE µ-Beam resource tier Expressive Kernel DB MACS hardware resources data / information resources

  5. Architecture - Technology Front-End Java Web Start, XML client tier Web application servers Java Servlets Authentication server Globus Security Infrastructure Web server Apache Web tier Session Manager Java RTS C, C++, Globus VIMCO Server Java, C, C++, XML, JDBC/ODBC, Matisse JAPI Processing Modules C, C++ application server tier VLAM-G Archive replication over raw disks Expressive Matisse Kernel DB Matisse MACS Matisse Linux cluster CAVE µ-Beam resource tier hardware resources data / information resources

  6. Interactions between components Front-End client tier XML internet Servlets Web tier authentication Web server XML session manager XML application server tier VIMCO Server RTS resource tier Hardware resources Kernel database application databases & archives

  7. A simple scenario A physicist VLAM-G user: • Log-on to VLAM-G • Perform a new surface analysis study • Fill in the MACS PFT • Perform surface analysis of a sample using the FTIR • Save the output of FTIR to the archive • Save (commit) the study • Log-out

  8. Log-on to VLAM-G Front-End client tier Physics Portal 1 internet Web tier authentication 5 Web server 2 3 session manager application server tier 4 VIMCO Server resource tier

  9. Surface analysis study – 1Obtain the MACS PFT Front-End client tier Physics Portal MACS PFT 1a 4c internet 4b Servlets Web tier Web server 1b 1c 4a application server tier VIMCO Server 2 3 resource tier MACS Kernel database application databases & archives

  10. Front-End – PFT Instantiator • PFT instantiator • Provides a guideline to the user • Allows the class to display its interface to get the information • Sends the information to the server as XML • Allows the user to establish the links between the steps

  11. Surface analysis study – 2Instantiate the MACS PFT Front-End client tier MACS PFT 1a internet XML Servlets Web tier Web server 1b 1c application server tier XML VIMCO Server 2 resource tier MACS application databases & archives

  12. Front-End – Experiment Editor • Experiment editor • Allows the user to compose his experiment using the available modules • Allows the user to save the experiment and submit it to the RTS to be executed

  13. Surface analysis study – 3Define a surface analysis experiment Front-End client tier Experiment Editor 1a 5d internet XML XML 5c Servlets Web tier Web server 1b 5b 1c application server tier XML XML VIMCO Server 2 4 3 resource tier MACS Kernel database application databases & archives

  14. Surface analysis study – 4Save and execute the experiment Front-End client tier Experiment Editor 1a 3 internet XML 3 Servlets Web tier Web server 1b 3 1c 1c application server tier XML XML VIMCO Server RTS 3 3 3 2 1d 3 resource tier Archive Hardware resources MACS Kernel database application databases & archives

  15. Information Management in VLAM-G VIMCO support to VLAM-G requirements: • Generic VLAM-G requirements: • VIMCO Server: data/information management functionalities • RTS information management modules • Session information management • VLAM-G AM requirements: • Kernel DB: Available modules, experiment topologies, PFTs for applications • Applications’ requirements: • Modeling application databases • PFTs for applications • Application user interfaces (interfaces for PFT instances)

  16. VIMCO Databases • Application databases (Expressive, MACS): • Study steps information (annotations) • (Structured) study/experiment results • Archive • (Unstructured) study/experiment results • Large data sets • Kernel DB • Information about available VLAM-G modules (developer, computing requirements, documentation, input and output data types, etc.) • Experiment topologies • PFTs for the VLAM-G applications (in the future) • User profiles and preferences (in the future)

  17. VIMCO Server • Single access point (broker) to the databases providing uniform and consistent support to all information management related aspects of VLAM-G components, namely the: • Front-end • RTS • Session manager • Session information management in a distributed environment • Open and flexible for integration of advanced information management functionalities in the future (e.g. Archipel and VO support)

  18. VIMCO Server functionality • Generic data/information management functionalities • Several Java, C, and Web based DB manipulation libraries • Support for VIMCO RTS processing modules • XML data management/exchange functionalities • Session information management • Supporting information management in a distributed and heterogeneous environment • Web application servers (Servlets)

  19. VIMCO RTS Modules • Connect/disconnect database • Start/commit/abort transaction • Archive operations: • Read from an existing file, write it to archive • Read from archive, write to a given file • Read from an input port, write it to archive • Read from archive, write it to an output port • Query processing: • Execute a query, write the result to a given file • Execute a query, write the result to an output port • Remote query processing: • Execute a query on a remote Grid node

  20. Experiment Editor Process Flow Template Front-End Start Portal End Portal Distributed RTS Connect Node B Node A Read / Write Disconnect Write Read Write Read VIMCO Server VL ARCHIVE EXPRESSIVE MACS EFC

  21. Implementation • Recall the simple scenario: • Log-on to VLAM-G • Perform a new surface analysis study • Fill in the MACS PFT • Perform surface analysis of a sample using the FTIR • Save the output of FTIR to the archive • Save (commit) the study • Log-out

  22. Implementation requirements(to support the scenario) • User session information management • Storage and retrieval of PFTs • Modifying the application user interfaces to fit into this architecture • Application classes capable of drawing itself and generating XML • XML data/information management for: • All Front-end – database communication • Front-end – RTS communication • Base VIMCO RTS processing modules • Web application servers to support client-server interaction (Servlets) • VIMCO Server – RTS interface

  23. Implementation plansshort term (with the current staff) • Start from the most required functionality: • XML support (central to VLAM-G information management): • Defining XML schemas for the required XML documents to be exchanged • Developing generic tools that can understand the XML schemas and create and parse the XML document accordingly • XML generator/parser tools – database interface • Application user interface modifications • Base VIMCO RTS processing modules • One group member is additionally working on the Front-End implementation

  24. Implementation planslong term • Archipel - federated information management system integrated within VIMCO Server: • Information sharing and integration • visibility and access rights • VO support integrated within VIMCO Server • Flexible PFTs and supporting data manipulation toolkits • Support for advanced user profile management, user preferences, etc.

  25. Considerations • Priorities have to be set • Component design and implementation must be open for future modifications/extensions • Minimal effort for modifications/extensions • External developments have to followed • Matisse developments

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