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Globus Toolkit Version 4 Overview: Enhancing Collaboration in Distributed Applications

Explore the features of Globus Toolkit Version 4, a collection of solutions for building collaborative distributed applications, emphasizing overcoming heterogeneity and leveraging existing standards. Learn about key components, interoperability, and management abstractions.

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Globus Toolkit Version 4 Overview: Enhancing Collaboration in Distributed Applications

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  1. Globus Toolkit version 4 Guy Warner NeSC TOE Team

  2. Acknowledgements These slides were taken from Talks given by Carl Kesselman and Jennifer Schopf of the Globus Team

  3. The Role of Globus • A collection of solutions to problems that come up frequently when building collaborative distributed applications • Heterogeneity • A focus, in particular, on overcoming heterogeneity for application developers • Standards • Capitalizes on and encourages use of existing standards (IETF, W3C, OASIS, GGF) • GT also includes reference implementations of new/proposed standards in these organizations

  4. Globus is an Hour Glass • Local sites have their own policies, installs – heterogeneity! • Queuing systems, monitors, network protocols, etc • Globus unifies – standards! • Build on Web services • Use WS-RF, WS-Notification to represent/access state • Common management abstractions & interfaces Higher-Level Services and Users Standard Interfaces Local heterogeneity

  5. Globus Open Source Grid Software G T 4 Delegation Service Community Scheduler Framework [contribution] Python WS Core [contribution] C WS Core G T 3 CommunityAuthorization Service OGSA-DAI [Tech Preview] WS Authentication Authorization Reliable File Transfer Java WS Core Grid Resource Allocation Mgmt (WS GRAM) Monitoring & Discovery System (MDS4) G T 2 Pre-WS Authentication Authorization GridFTP Grid Resource Allocation Mgmt (Pre-WS GRAM) Monitoring & Discovery System (MDS2) C Common Libraries G T 3 Replica Location Service XIO G T 4 Credential Management Web ServicesComponents Non-WS Components Security Data Management Execution Management Information Services CommonRuntime

  6. GT2 vs GT4 • Pre-WS Globus is in GT4 release • Both WS and pre-WS components (ala 2.4.3) are shipped • These do NOT interact, but both can run on the same resource independently • Basic functionality is the same • Run a job • Transfer a file • Monitoring • Security • Code base is completely different

  7. GT4 Components Your Python Client Your C Client Your Java Client Your Python Client Your Python Client Your C Client Your C Client CLIENT Your Java Client Your Java Client Your Python Client Your C Client Your Java Client Interoperable WS-I-compliant SOAP messaging X.509 credentials = common authentication Trigger Archiver Your C Service GRAM RFT Delegation Index CAS OGSA-DAI GTCP Your Python Service Your Java Service Your Java Service RLS GridFTP SimpleCA MyProxy Pre-WS MDS Pre-WS GRAM C WS Core pyGlobus WS Core Java Services in Apache Axis Plus GT Libraries and Handlers Python hosting, GT Libraries C Services using GT Libraries and Handlers SERVER

  8. Pre-WS GRAM • globus-job-submit <contact string> <executable> • Contact string identifies host & queue for submitting job. • Returns URI used by subsequent commands to identify your job. (Not a URL) • e.g. https://crockett.epcc.ed.ac.uk:43839/16639/1183992570/ • globus-job-status <URI> • Get status of job identified by URI • globus-job-get-output [-err] <URI> • Get standard output (/error) of job identified by URI

  9. User Applications Custom WSRF Web Services Custom Web Services GT4WSRF Web Services Registry Administration GT4 Container WS-Addressing, WSRF, WS-Notification WSDL, SOAP, WS-Security GT4 Web Services Core

  10. Tutorials • pre-WS GRAM using EPCC EI cluster http://homepages.nesc.ac.uk/~gcw/OMII_Europe/jobs.html • WSRF service development http://homepages.nesc.ac.uk/~gcw/OMII_Europe/WSRF.html

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