Opportunistic Resource Usage in CMS

Conference · Wed Jan 01 00:00:00 EST 2014 · J.Phys.Conf.Ser.

DOI:https://doi.org/10.1088/1742-6596/513/6/062028· OSTI ID:1296593

Kreuzer, Peter ^[1]; Hufnagel, Dirk ^[2]; Dykstra, D. ^[2]; Gutsche, O. ^[2]; Tadel, M. ^[3]; Sfiligoi, I. ^[3]; Letts, J. ^[3]; Wuerthwein, F. ^[3]; McCrea, A. ^[3]; Bockelman, B. ^[4]; Fajardo, E. ^[5]; Linares, L. ^[5]; Wagner, R. ^[6]; Konstantinov, P. ^[7]; Blumenfeld, B. ^[8]; Bradley, D. ^[9]

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1. RWTH Aachen U.
2. Fermilab
3. UC, San Diego
4. Nebraska U.
5. Andes U., Merida
6. TI, San Diego
7. Sofiya, Inst. Nucl. Res.
8. Johns Hopkins U.
9. Wisconsin U., Madison

CMS is using a tiered setup of dedicated computing resources provided by sites distributed over the world and organized in WLCG. These sites pledge resources to CMS and are preparing them especially for CMS to run the experiment's applications. But there are more resources available opportunistically both on the GRID and in local university and research clusters which can be used for CMS applications. We will present CMS' strategy to use opportunistic resources and prepare them dynamically to run CMS applications. CMS is able to run its applications on resources that can be reached through the GRID, through EC2 compliant cloud interfaces. Even resources that can be used through ssh login nodes can be harnessed. All of these usage modes are integrated transparently into the GlideIn WMS submission infrastructure, which is the basis of CMS' opportunistic resource usage strategy. Technologies like Parrot to mount the software distribution via CVMFS and xrootd for access to data and simulation samples via the WAN are used and will be described. We will summarize the experience with opportunistic resource usage and give an outlook for the restart of LHC data taking in 2015.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: CMS
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1296593
• Report Number(s): FERMILAB-CONF-13-696-CD; 1302187
• Journal Information: J.Phys.Conf.Ser., Vol. 513; Conference: 20th International Conference on Computing in High Energy and Nuclear Physics, Amsterdam, The Netherlands, 10/14-10/18/2013
• Country of Publication: United States
• Language: English