FAMoS - an information service on the usage of data files in AliEn

16th International workshop on Advanced Computing and Analysis Techniques in physics research

物理学;计算机科学

Abramyan, A.^1 ; Betev, L.^2 ; Buncic, P.^2 ; Grigoras, C.^2 ; Grigoryan, A.^1 ; Manukyan, N.^1,2 ; Pedreira, M.M.^2 ; Saiz, P.^2

A.I. Alikhanyan National Science Laboratory Foundation, 2 Brothers Alikhanyan str., Yerevan

0036, Armenia^1

CERN, Geneve 23

CH-1211, Switzerland^2

关键词: Access time;    Directory structure;    File distribution;    File location;    Replication factors;    Service operations;    Storage elements;    Time-periods;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/608/1/012020/pdf
DOI  :  10.1088/1742-6596/608/1/012020

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The File Access Monitoring Service (FAMoS) leverages the information stored in the central AliEn file catalogue, which describes every file in a Unix-like directory structure, as well as metadata on file location and its replicas. In addition, it uses the access information provided by a set of API servers, used by all Grid clients to access the catalogue. The main functions of FAMoS are to sort the file accesses by logical groups, access time, user and storage element. The collected data identifies rarely used groups of files, as well as those with high popularity over different time periods. This information can be further used to optimize file distribution and replication factors, thus increasing the data processing efficiency. The paper describes the FAMoS structure and user interface and presents the results obtained in one year of service operation.