CMS Space Monitoring

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

物理学;计算机科学

Ratnikova, N.^1 ; Huang, C.-H.^1 ; Sanchez-Hernandez, A.^2 ; Wildish, T.^3 ; Zhang, X.^4

Fermi National Accelerator Laboratory, Batavia

IL, United States^1

Centro Invest., Estudios Avanz, Mexico City, Mexico^2

Princeton University, Princeton

NJ, United States^3

Institute of High Energy Physics, Beijing, China^4

关键词: Data placement;    Data services;    LHC experiments;    Monitoring system;    Resource planning;    Software component;    Space utilization;    Time interval;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/513/4/042036/pdf
DOI  :  10.1088/1742-6596/513/4/042036

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

During the first LHC run, CMS stored about one hundred petabytes of data. Storage accounting and monitoring help to meet the challenges of storage management, such as efficient space utilization, fair share between users and groups and resource planning. We present a newly developed CMS space monitoring system based on the storage metadata dumps produced at the sites. The information extracted from the storage dumps is aggregated and uploaded to a central database. A web based data service is provided to retrieve the information for a given time interval and a range of sites, so it can be further aggregated and presented in the desired format. The system has been designed based on the analysis of CMS monitoring requirements and experiences of the other LHC experiments. In this paper, we demonstrate how the existing software components of the CMS data placement system, PhEDEx, have been re-used, dramatically reducing the development effort.