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Mar 21 – 27, 2009
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The Integration of Virtualization into the U.S. ATLAS Tier 1 Facility at Brookhaven

Mar 24, 2009, 5:50 PM
Club B (Prague)

Club B


Prague Congress Centre 5. května 65, 140 00 Prague 4, Czech Republic
oral Hardware and Computing Fabrics Hardware and Computing Fabrics


Mr Christopher Hollowell (Brookhaven National Laboratory) Mr Robert Petkus (Brookhaven National Laboratory)


The RHIC/ATLAS Computing Facility (RACF) processor farm at Brookhaven National Laboratory currently provides over 7200 cpu cores (over 13 million SpecInt2000 of processing power) for computation. Our ability to supply this level of computational capacity in a data-center limited by physical space, cooling and electrical power is primarily due to the availability of increasingly dense multi-core x86 cpu's. In this era of dense and inexpensive multi-core processors, the use of system virtualization has become increasingly important. By virtualizing a single multi-core server into many, one can minimize the impact of operating system and service failures. Virtualization can also serve as a useful tool in the elimination of resource contention issues on compute nodes. For these reasons, we have split a number of our multi-core systems into virtual Condor batch, interactive and testbed components with Xen. The flexibility offered by virtualization comes with a price, however, a new level of configuration management complexity. This presentation will discuss our experiences with Xen. In particular, we will cover our development of a custom software toolkit to simplify Xen configuration management. This has allowed us to integrate Xen deployments with our existing, automated OS provisioning system and can potentially lead to the virtualization to thousands of hosts.

Primary author

Dr Tony Chan (Brookhaven National Laboratory)


Mr Alexander Withers (Brookhaven National Laboratory) Mr Christopher Hollowell (Brookhaven National Laboratory) Mr James Pryor (Brookhaven National Laboratory) Mr Richard Hogue (Brookhaven National Laboratory) Mr Robert Petkus (Brookhaven National Laboratory) Yingzi wu (Brookhaven National Laboratory)

Presentation materials