14-18 October 2013
Amsterdam, Beurs van Berlage
Europe/Amsterdam timezone

Using ssh as portal - The CMS CRAB over glideinWMS experience

15 Oct 2013, 17:47
22m
Keurzaal (Amsterdam, Beurs van Berlage)

Keurzaal

Amsterdam, Beurs van Berlage

Oral presentation to parallel session Distributed Processing and Data Handling B: Experiment Data Processing, Data Handling and Computing Models Distributed Processing and Data Handling B: Experiment Data Processing, Data Handling and Computing Models

Speaker

Mr Igor Sfiligoi (University of California San Diego)

Description

The User Analysis of the CMS experiment is performed in distributed way using both Grid and dedicated resources. In order to insulate the users from the details of computing fabric, CMS relies on the CRAB (CMS Remote Analysis Builder) package as an abstraction layer. CMS has recently switched from a client-server version of CRAB to a purely client-based solution, with ssh being used to interface with either HTCondor or glideinWMS batch systems. This switch has resulted in significant improvement of user satisfaction, as well as in significant simplification of the CRAB code base. This paper presents the architecture of the ssh-based CRAB package, the rationale behind it, as well as the operational experience running both the client-server and the ssh-based versions in parallel for several months.

Primary authors

Mr Igor Sfiligoi (University of California San Diego) Stefano Belforte (Universita e INFN (IT))

Co-author

Ian Fisk (Fermi National Accelerator Lab. (US))

Presentation Materials