Opportunistic Resource Usage in CMS

20th International Conference on Computing in High Energy and Nuclear Physics

物理学;计算机科学

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

Rheinisch-Westfalische Technische Hochschule (RWTH), Germany^1

Fermi National Accelerator Laboratory (Fermilab), United States^2

University of California, San Diego (UCSD), United States^3

University of Nebraska-Lincoln (UNL), United States^4

Universidad de Los Andes (UNIANDES), United States^5

San Diego Supercomputer Center, San Diego

CA, United States^6

Institute for Nuclear Research and Nuclear Energy (Sofia-INRNE), United States^7

John Hopkins University, United States^8

University of Wisconsin-Madison, United States^9

关键词: Computing resource;    ITS applications;    Resource usage;    Software distributions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/513/6/062028/pdf
DOI  :  10.1088/1742-6596/513/6/062028

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

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.