Speaker
Dr
Daniele Spiga
(INFN & Università degli Studi di Perugia)
Description
CMS is one of the four experiments expected to take data at LHC. Order of some
PetaBytes of data per year will be stored in several computing sites all over the
world. The collaboration has to provide tools for accessing and processing the data
in a distribuited environment, using the grid infrastructure. CRAB (Cms Remote
Analysis Builder) is a user-friendly tool developed by INFN within the CMS, to help
the user to submit a job to the grid, featuring the input data discovery, the Job
creation, the job submission, the monitoring of the job status, the output retrieval
and, finally, the handling of the user output. In this abstract we describe how we
monitor the use of CRAB, by means of an applications which collects the jobs
informations from submission time to output retrieval time, and send them to a
DataBase. We also present some analysis of the data collected during the second half
of 2005, aimed at understanding the performance of the whole system and at finding
eventual bottlenecks, in order to understand how to improve the system.
Author
Dr
Daniele Spiga
(INFN & Università degli Studi di Perugia)
Co-authors
Dr
Faina Loris
(INFN & Università degli Studi di Perugia)
Dr
Leonello Servoli
(INFN & Università degli Studi di Perugia)
