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Understanding JSDL: Job Submission and Monitoring in Grid Computing

This document provides an overview of Job Submission Description Language (JSDL) and its integration with other standards like WS-A and JLM for effective job management in grid computing. JSDL allows users to define job requirements in a structured format, enabling interoperability across different grid systems. It discusses the lifecycle of a JSDL document, the importance of resource requirements, and the use of extensions like GridSAM for job submission and monitoring. Detailed XML examples illustrate how to define jobs, including application details and proxy server configuration.

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Understanding JSDL: Job Submission and Monitoring in Grid Computing

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  1. Activity Schema What we’ve discussed already A. Stephen MCGough Imperial College London

  2. Job Job Job JSDL JSDL JSDL JLM JLM JLM … … … RRL RRL RRL JPL JPL JPL WS-A WS-A WS-A SDL SDL SDL … … … JSDL: Conceptual relation with other standards Workflow Job JSDL JLM … RRL JPL SDL WS-A … RRL - Resource Requirements Language SDL – Scheduling Description Language WS-A – WS-Agreement JLM – Job Lifetime Management JPL – Job Policy Language

  3. JSDL Document Life Cycle • A JSDL document may be • Abstract • Only the minimum information necessary • For example, application name and input files • Runnable at sites that understand this level of description • Refined • More detail provided • Target site, number of CPUs, which data source • May be refined several times • Tied to a specific site/system • Incarnated (Unicore speak); or • Grounded (Globus speak) • This model is supported/allowed but not required by JSDL BES (GridSAM)

  4. GridSAMJob Submission and Monitoring Web Service

  5. Integration with OMII Distribution

  6. Deployment Scenario: Globus 2.4.3

  7. JSDL Extension Example • <?xml version="1.0" encoding="UTF-8"?> <JobDefinition xmlns="http://schemas.ggf.org/jsdl/2005/11/jsdl"> • <JobDescription> <POSIXApplication xmlns="http://schemas.ggf.org/jsdl/2005/11/jsdl-posix"> • <Executable>/bin/echo</Executable> • <Argument>hello world</Argument> • </POSIXApplication> • </JobDescription> • <MyProxy xmlns="urn:gridsam:myproxy"> • <ProxyServer>myproxy.ncsa.uiuc.edu</ProxyServer> • <ProxyServerDN> • /C=US/O=National Center for Supercomputing • Applications/CN=bosco.ncsa.uiuc.edu</ProxyServerDN> • <ProxyServerPort>7512</ProxyServerPort> • <ProxyServerUserName>myusername</ProxyServerUserName> • <ProxyServerPassPhrase>mypassphrase</ProxyServerPassPhrase> • <ProxyServerLifetime>7512</ProxyServerLifetime> • </MyProxy> • </JobDescription> • </JobDefinition>

  8. Or… • Use GridSAM to add this info into a vanilla JSDL document for you • gridsam-submit -sn ngs -myproxy -myproxyuser myusername -myproxyhost myproxy.ncsa.uiuc.edu -j <HOME>/helloworld.jsdl • MyProxy passphrase: ******** • urn:gridsam:ff80808201afccc00101afccc3900001

  9. myproxy:MyProxyServer: MyProxy server hostname • myproxy:ProxyServerDN: Expected MyProxy server distinguished name so GridSAM can authenticate the server. • myproxy:ProxyServerPort: MyProxy server port. The default is 7512. • myproxy:ProxyServerUserName: The MyProxy username • myproxy:ProxyServerPassPhrase: The plain-text MyProxy passphrase. User should authenticate and authorise the GridSAM server before passing this information across the network. • myproxy:ProxyServerLifetime: The lifetime of the delegated proxy retrieved from the MyProxy server.

  10. Questions? Official Download http://www.omii.ac.uk Project Information and Documentation http://gridsam.sourceforge.net

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