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The Globus Toolkit

The Globus Toolkit. Gary Jackson <garyj@umiacs.umd.edu>. Introduction. The Globus Toolkit is a product of the Globus Alliance (http://www.globus.org) It is middleware for developing grids The current release is 3.2, and the 4.0 release is forthcoming. Services Provided.

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The Globus Toolkit

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  1. The Globus Toolkit Gary Jackson <garyj@umiacs.umd.edu>

  2. Introduction • The Globus Toolkit is a product of the Globus Alliance (http://www.globus.org) • It is middleware for developing grids • The current release is 3.2, and the 4.0 release is forthcoming

  3. Services Provided • Infrastructure (MDS, Web services) • Security • (GSI, CAS, etc.) • Data Grid • (GridFTP, RFT, RLS) • Computational Grid • (GRAM)

  4. Services Provided: Infrastructure • Web-services based infrastructure • At a low level, grid services are web services • Additionally, statefulness added with the Web Services: Resource Framework (WSRF) in the Globus Toolkit 4.0 (GT4) • Monitoring and Discovery System (MDS) • For finding resources in a grid

  5. Services Provided: Security • Grid Security Infrastructure (GSI) for authentication • X.509 with proxy certificates (RFC3820) • Web-service interfaces for authentication and authorization • Community Authorization Service • Web-services based authorization service

  6. Services Provided:Data Grid • GridFTP • Efficient, non-web-service based protocol for data transfer • Replica Location Service (RLS) • Efficient distributed service for enumerating the locations of file replicas • Reliable File Transfer (RFT) • Service for reliably managing file transfers

  7. Services Provided:Computational Grids • Grid Resource Allocation Manager • Resource identification and job execution • From other parties • Condor-G • Community Scheduler Framework

  8. Implemented Standards and Protocols • GSI (RFC3820) for secure authentication • W3C draft standards for web services (WS: Resource Framework, WS: Addressing, etc.)

  9. Metadata • No direct support with the distribution • We’ve used the Metadata Catalog Service (MCS) before to manage metadata in a data grid

  10. Maturity • The Globus Toolkit has been around for many years • However, the transition to web services has been rocky: GT3 is based on extensions to web services that were not widely accepted • This should stabilize with the release of GT4

  11. Support • From the Globus Alliance and the Globus community • Manuals • Mailing lists • Good tutorial on development from Borja Sotomayor(http://www.casa-sotomayor.net/gt3-tutorial/)

  12. Support • Commercial Support from Platform Computing (http://www.platform.com) • Supported distribution of GT3 • Enhanced support for job scheduling on a grid (for computational grids)

  13. Globus Licensing • Globus is covered under the Globus Toolkit Public License (GTPL 2) • This is a very open license that allows modification and redistribution in source or binary form for any party, with some stipulations about further licensing and advertisement • It also extends patent licensing

  14. Future Plans • There have been several GT4 alpha releases, including one scheduled for January 31st • The GT4 beta is due on March of this year • The GT4 final release is due in April of this year

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