Abstract:

The Grid Laboratory Of Wisconsin (GLOW) is a NSF funded, distributed
facility at the University of Wisconsin - Madison campus. It consists of
more than 1400 CPUs and 100 TB of storage that are located at six different
sites and serve a broad range of disciplines ranging from Biotechnology and
Computer Sciences to Medical-Physics and Economics. Each of the GLOW sites
is configured as an autonomous locally managed Condor pool that can operate
independently when disconnected from the other sites. Under normal
conditions, the six pools act like a single Condor system that is
coordinated via a highly-available campus-wide matchmaking service.
On-campus and of-campus users interact with GLOW through job-managers
located on their desktop computers. 

The Open Science Grid (OSG) is a DOE and NSF funded US national distributed
computing facility that supports scientific computing via an open
collaboration of science researchers, software developers and computing,
storage and network providers. The OSG Consortium is building and operating
the OSG, bringing resources and researchers from universities and national
laboratories together and cooperating with other national and international
infrastructures to give scientists access to shared resources worldwide. The
particular characteristics of the OSG are to: Provide guaranteed and
opportunistic access to shared resources; Operate a heterogeneous
environment both in services available at any site and for any Virtual
Organization, and multiple implementations behind common interfaces; Support
multiple software releases at any one time; Interface to Campus and Regional
Grids; Federate with other national and international Grids.

In the talk, we will provide an overview of these two cyber-infrastructures
and present the capabilities we implemented and deployed to "elevate" local
GLOW jobs to the national OSG infrastructure. These capabilities support a
"bottom-up" approach to the construction and operation of large scale
distributed/grid computing infrastructure.