Hierarchical Architecture

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Grids running UGP have been set up in a hierarchical fashion at multiple University of California campuses and at the University of California as a whole.

The hierarchical design allows:

 • Each user of a Campus Grid Portal to automatically be signed up to use the
   UC Grid Portal.
 • A user who has a login id on clusters on multiple campuses to access the
   Campus Grid Portal of each of those campuses as well as the UC Grid Portal.
 • The UC Grid Portal to access every cluster that belongs to each of the
   Campus Grids, i.e., every cluster that participates in a Campus Grid also
   participates in the UC Grid.
 • Clusters at the campus level to contribute both cycles and applications to
   the default and specialty UC resource pools in addition to the campus
   resource pools of the local Campus Grid.

The Figure below depicts a hierarchical Grid architecture, specifically the Multi-Campus Grid architecture for the University of California. This figure depicts the Campus Grids for three campuses and UC Grid. Each Campus Grid is a Stand-Alone Grid without a CA. A single CA for the Grid is included as part of the UC Grid and two special services, the Register Service and the Sync Service. The Register Service is used to issued a central CA for the new user; The Sync Service is used to keep everything in sync at real time. They are all run at the highest-level Grid Portal, in this case the UC Grid Portal.

Each Grid Appliance, at each Campus Grid must be open to both the Campus Grid Portal and the UC Grid Portal.

File:Multi Grid Architecture.jpg

Hierarchical Grid Topics

  • Workflow to add a User to both the user's local (Campus) Grid and the higher-level Grid