Speaker
Garzoglio Gabriele
(FERMI NATIONAL ACCELERATOR LABORATORY)
Description
The SAM-Grid system is an integrated data, job, and information management
infrastructure. The SAM-Grid addresses the distributed computing needs of the
experiments of RunII at Fermilab. The system typically relies on SAM-Grid services
deployed at the remote facilities in order to manage the computing resources. Such
deployment requires special agreements with each resource provider and it is a labor
intensive process. On the other hand, the DZero VO has also access to computing
resources through the LCG infrastructure. In this context, resource sharing
agreements and the deployment of standard middleware are negotiated within the
framework of the EGEE project.
The SAM-Grid / LCG interoperability project was started to let DZero users retain the
user-friendlyness of the SAM-Grid interface, allowing, at the same time, access to
the LCG pool of resources. This "bridging" between grids is beneficial for both the
SAM-Grid and LCG, since it minimizes the deployment efforts of the SAM-Grid team and
exercises the LCG computing infrastructure with data intensive production
applications of a running experiment.
The interoperability system is centered around job "forwarding" nodes, which receive
jobs prepared by the SAM-Grid and submit them to LCG. This paper discusses the
architecture of the system and how it addresses inherent issues of service
accessibility and scalability. The paper also presents the operational and support
challenges that arise to operate the system in production.
Primary authors
Andrii Baranovski
(Fermilab)
Garzoglio Gabriele
(FERMI NATIONAL ACCELERATOR LABORATORY)
Parag Mhashilkar
(Fermilab)
Co-authors
Anoop Rajendra
(University of Texas at Arlington)
Sudhamsh Reddy
(University of Texas at Arlington)
Tibor Kurca
(CCIN2P3)
Torsten Harenberg
(University of Wuppertal)
