PROOF-based analysis on the ATLAS Grid facilities: first experience with the PoD/PanDa plugin

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

物理学;计算机科学

Vilucchi, E.^3 ; De Salvo, A.^1 ; Di Donato, C.^2 ; Di Nardo, R.^3 ; Doria, A.^2 ; Ganis, G.^4 ; Manafov, A.^5 ; Mancini, G.^3 ; Mazza, S.^6 ; Preltz, F.^6 ; Rebatto, D.^6 ; Salvucci, A.^7 ; Pineda, A. R. Sanchez^3

INFN Sezione di Romai, piazzale Aldo Moro, I-Roma-(RM)

00146, Italy^1

INFN Sezione di Napoli, Complesso Universitario di Monte SantAngelo, via Cinthia, Napoli (NA)

80126, Italy^2

INFN Laboratori Nazionali di Frascati, via E. Fermi 40, Frascati (RM)

00044, Italy^3

CERN, Geneva 23

CH-1211, Switzerland^4

GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, Darmstadt

64291, Germany^5

INFN Sezione di Milano, via Celoria 16, I-Milano-(MI), Italy^6

Radboud University Nijmegen and Nikhef, Netherlands^7

关键词: Benchmark tests;    Computing model;    Computing power;    Different protocols;    Distributed analysis;    Multi-core machines;    Physics analysis;    Resource management systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/513/3/032102/pdf
DOI  :  10.1088/1742-6596/513/3/032102

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

In the ATLAS computing model Grid resources are managed by PanDA, the system designed for production and distributed analysis, and data are stored under various formats in ROOT files. End-user physicists have the choice to use either the ATHENA framework or directly ROOT, that provides users the possibility to use PROOF to exploit the computing power of multi-core machines or to dynamically manage analysis facilities. Since analysis facilities are, in general, not dedicated to PROOF only, PROOF-on-Demand (PoD) is used to enable PROOF on top of an existing resource management system. In a previous work we investigated the usage of PoD to enable PROOF-based analysis on Tier-2 facilities using the PoD/gLite plug-in interface. In this paper we present the status of our investigations using the recently developed PoD/PanDA plug-in to enable PROOF and a real end-user ATLAS physics analysis as payload. For this work, data were accessed using two different protocols: XRootD and file protocol. The former in the site where the SRM interface is Disk Pool Manager (DPM) and the latter where the SRM interface is StoRM with GPFS file system. We will first describe the results of some benchmark tests we run on the ATLAS Italian Tier-1 and Tier-2s sites and at CERN. Then, we will compare the results of different types of analysis, comparing performances accessing data in relation to different types of SRM interfaces and accessing data with XRootD in the LAN and in the WAN using the ATLAS XROOTD storage federation infrastructure.