JUDAC user documentation

This documentation explains various aspects of using the JUDAC system at Jülich Supercomputing Centre. It contains both introductory and advanced material.

First time users might want to start at the beginning and work through the first few chapters, skipping those sub-chapters that contain advanced material. This way, you will learn how to log in to JUDAC and familiarize yourself with the environment.

Advanced users can peruse the table of contents below to find out about particular topics they are interested in.

Contents:

• Access
  • Prerequisites
  • SSH Login
  • Login Nodes
  • Alternative Login Methods
• Configuration
  • Hardware Characteristics of JUDAC
  • Software Characteristics
• Environment
  • Shell
  • Active project
  • Available file systems
  • Machine identification file
  • Transferring files with scp, rsync, etc.
  • Using Git on JUDAC
• Container Runtime on JUDAC
  • What Containers Provide
  • Getting Access
  • Apptainer on JUDAC
  • Container Build System
  • Apptainer image building
• Object Storage on JUDAC
  • User Environment Preparation
  • OpenStackClient CLI
  • SWIFT Protocol - Manage objects and containers
  • S3 Protocol - Manage objects and containers
  • S3 boto3 API
• UFTP Service
  • Client setup
  • Key management
  • Usage and examples
  • Data sharing
• GridFTP Service
  • Examples
  • Problems
• GRID Software
  • Globus
  • LCG and VOMS
  • gfal2
  • dCache
  • Certificates
• Data Mover Service
  • Technical Concept
  • Data Mover Command Line Interface (CLI)
  • Task Handling
  • Miscellaneous
• GPFS File Systems in the Jülich Environment
  • Best practice notes
• Known Issues on JUDAC
  • Open Issues
  • Recently Resolved and Closed Issues
• FAQ
  • FAQ about Data Management
• Maintenance