WORLDWIDE LHC COMPUTING GRID GLITE 3.2 USER GUIDE MANUALS SERIES Document identifier: CERN-LCG-GDEIS-722398 EDMS id: 722398 Version: 1.4.2 Date: July 18, 2012 Section: Experiment Integration and Distributed Analysis Document status: RELEASED Author(s): Stephen Burke, Simone Campana, Elisa Lanciotti, Maarten Litmaath, Patricia Mendez´ Lorenzo, Vincenzo Miccio, Christopher Nater, Roberto Santinelli, Andrea Sciaba` Editor: Andrea Sciaba` File: gLite-3-UserGuide Abstract: This guide is an introduction to the WLCG/EGI Grid and to the gLite 3.2 middleware from a user’s point of view. Document Change Record Issue Item Reason for Change 17/07/12 v1.4.2 Minor corrections 31/07/11 v1.4.1 Improved version for gLite 3.2 15/12/10 v1.4 Updated to gLite 3.2 15/01/10 v1.3 Improved version for gLite 3.1 15/01/08 v1.2 First version for gLite 3.1 17/01/07 v1.1 Revised version 20/04/06 v1.0 First draft Files Software Products User files PDF https://edms.cern.ch/file/722398/1.4/gLite-3-UserGuide.pdf CERN-LCG-GDEIS-722398 Manuals Series Page 2 CONTENTS 1 INTRODUCTION . 8 1.1 ACKNOWLEDGMENTS . 8 1.2 OBJECTIVES OF THIS DOCUMENT . 8 1.3 APPLICATION AREA . 8 1.4 DOCUMENT EVOLUTION PROCEDURE . 8 1.5 REFERENCE AND APPLICABLE DOCUMENTS . 9 1.6 TERMINOLOGY . 12 1.6.1 Acronyms. 12 2 EXECUTIVE SUMMARY . 15 3 OVERVIEW . 16 3.1 PRELIMINARY MATTERS. 17 3.1.1 Code Development . 17 3.1.2 Troubleshooting . 17 3.1.3 User and VO utilities . 17 3.2 THE WLCG/EGI INFRASTRUCTURE. 18 3.3 THE WLCG/EGI ARCHITECTURE . 18 3.3.1 Security. 18 3.3.2 User Interface . 19 3.3.3 Computing Element . 20 3.3.4 Storage Element . 20 3.3.5 Information Service . 21 3.3.6 Data Management. 23 3.3.7 Workload Management . 24 CERN-LCG-GDEIS-722398 Manuals Series Page 3 3.4 JOB FLOW . 25 3.4.1 Job Submission . 25 3.4.2 Other Operations. 26 3.4.3 Pilot job frameworks . 27 4 GRID SECURITY AND GETTING STARTED . 27 4.1 BASIC SECURITY CONCEPTS. 27 4.1.1 Private and Public Keys. 27 4.1.2 Encryption . 27 4.1.3 Signing . 27 4.1.4 Certificates . 28 4.1.5 Certification Authorities . 28 4.1.6 Proxies . 28 4.1.7 VOMS Proxies . 29 4.2 FIRST STEPS . 29 4.3 OBTAINING A CERTIFICATE . 30 4.3.1 X.509 Certificates. 30 4.3.2 Requesting the Certificate . 30 4.3.3 Getting the Certificate . 31 4.3.4 Renewing the Certificate . 31 4.3.5 Taking Care of Private Keys . 32 4.4 REGISTERING WITH WLCG/EGI . 33 4.4.1 The Registration Service . 33 4.4.2 Virtual Organisations . 33 4.5 SETTING UP THE USER ACCOUNT . 34 4.5.1 The User Interface . 34 CERN-LCG-GDEIS-722398 Manuals Series Page 4 4.5.2 Checking a Certificate . 34 4.6 VOMS PROXIES . 37 4.6.1 Proxy Renewal . 40 5 INFORMATION SERVICE . 43 5.1 LCG-INFO. 43 5.2 LCG-INFOSITES . 46 5.3 THE LDAPSEARCH COMMAND . 48 5.3.1 Example ldapsearch commands . 49 5.3.2 The search base and the distributed DIT . 52 5.4 GRAPHICAL USER INTERFACES . 52 5.4.1 GStat . 52 6 WORKLOAD MANAGEMENT . 54 6.1 INTRODUCTION . ..