Abstract
The Virtual Machine framework was used to assemble the STAR-computing environment, validated once, deployed on over 100 8-core VMs at NERSC and Argonne National Lab, and used as a homogeneous Virtual Farm processing events acquired in real time by STAR detector located at Brookhaven National Lab. To provide time dependent calibration, a database snapshot scheme was devised. The two high capacity filesystems, localized at the opposite coasts of US and interconnected via Globus-Online protocol, were used in this setup, which resulted with a highly scalable Cloud-based extension of STAR computing resources. The system was in continuous operation for over 3 months.
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