Co-scheduling from the Web
A co-scheduler is a special class of metascheduler that allows cross-site reservations. The Co-scheduling portlet in the SDSC User Portal offers all the functionality of the Grid Universal Remote (GUR) command line tool . Through the Web interface, a user can synchronize reservations to run jobs on computation resources at multiple sites.
How to Use
The portlet is available from the Reservations tab of the SDSC User Portal. Fill out the form to submit or cancel reservations. It is helpful to know the policies of the individual sites that determine maximum number of nodes and, duration, and other parameters. See the specific instructions and policies in the portal.
Where to Run Jobs
Currently, SDSC and NCSA have enabled the GUR co-scheduling service on their IA-64 Linux Clusters.
Advantages and Recommended Use
Simulations or analyses that require simultaneous use of multiple resources, such as a those with extremely large memory requirements that cannot be met by using a single resource, are especially well suited for using the Co-scheduling portlet.
How It Works
Both User-Settable Reservations and Cross-Site Co-Scheduling portlets utilize technologies such as TeraGrid Single Sign-On, GridSphere portal framework and GridPortlets API, MyProxy X.509 certificate management, Globus middleware, and job schedulers such as Catalina and Moab. For detailed functional and architectural design, please see TG '08 Reservations Poster [PDF].
