Speaker
Ms
Ying Ying Li
(University of Cambridge)
Description
The DIRAC workload-management system of the LHCb experiment allows
coordinated use of globally distributed computing power and data storage. The
system was initially deployed only on Linux platforms, where it has been used
very successfully both for collaboration-wide production activities and for single-
user physics studies. To increase the resources available to LHCb, DIRAC has
been extended so that it also allows use of Microsoft Windows machines. As
DIRAC is mostly written in Python, a large part of the code base was already
platform independent, but Windows-specific solutions have had to be found in
areas such as certificate-based authentication and secure file transfers,
where .NetGridFTP has been used. In addition, new code has been written to
deal with the way that jobs are run and monitored under Windows, enabling
interaction with Microsoft Windows Compute Cluster Server 2003 on sets of
machines where this is available. The result is a system that allows users’
transparent access to Linux and Windows distributed resources. This paper
gives details of the Windows-specific developments for DIRAC, outlines the
experience gained deploying the system at a number of sites, and reports on
the performance achieved running the LHCb data-processing applications.
| Submitted on behalf of Collaboration (ex, BaBar, ATLAS) | LHCb |
|---|
Author
Ms
Ying Ying Li
(University of Cambridge)
Co-authors
Dr
Andrei Tsaregorodtsev
(Université d'Aix - Marseille II)
Mr
Karl Harrison
(University of Cambridge)
Prof.
Michael Andrew Parker
(University of Cambridge)
Dr
Vassily Lyutsarev
(Microsoft Research)
