Speaker
D. Smith
(STANFORD LINEAR ACCELERATOR CENTER)
Description
for the BaBar Computing Group.
The analysis of the BaBar experiment requires many times the measured
data to be produced in simulation. This requirement has resulted in
one of the largest distributed computing projects ever completed.
The latest round of simulation for BaBar started in early 2003, and
completed in early 2004, and encompassed over 1 million jobs, and
over 2.2 billion events. By the end of the production cycle over 2
dozen different computing centers and nearly 1.5 thousand cpus were
in constant use in North America and Europe. The whole effort was
managed from a central database at SLAC, with real-time updates of
the status of all jobs. Utilities were developed to tie together
production with many different batch systems, and with different
needs for security.
The produced data was automatically transfered to SLAC for use and
distribution to analysis sites. The system developed to manage this
effort was a combination of web and database applications, and
command line utilities. The technologies used to complete this
effort along with its complete scope will be presented.
