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Contents:

  • Access
    • Prerequisites
    • SSH Login
      • Restrictions
      • OpenSSH
        • OpenSSH Installation
        • OpenSSH Key Generation
        • Key Upload, Key Restriction
        • Logging in to JUDAC
        • Key Agent
        • OpenSSH Persistent Configuration
          • X Forwarding
        • Troubleshooting
        • Further Reading
      • PuTTY
        • PuTTY Installation
        • PuTTY Key Generation
        • PuTTY Persistent Configuration
    • MFA with TOTP
    • Login Nodes
      • Example
    • Alternative Login Methods
  • Configuration
    • Hardware Characteristics of JUDAC
    • Software Characteristics
  • Environment
    • Shell
    • Active project
    • Available file systems
      • File systems for compute projects
        • Home directory ($HOME)
        • Project directory ($PROJECT)
        • Working directory ($SCRATCH)
      • File systems for data projects
        • Data directory ($FASTDATA)
        • Data directory ($DATA)
        • Archive directory ($ARCHIVE)
    • 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
      • Backwards compatibility to Singularity
      • Apptainer Images
      • Launching Containers via Slurm
      • Interfacing with the System Environment
        • The two Models
        • Containerized Applications
        • User-Defined Software Stack
    • Container Build System
      • Building Container Images via CLI
      • Container Build System REST API
    • Apptainer image building
      • Converting Dockerfiles to Apptainer recipes
      • Rootless builds
      • Rootfull builds
  • Object Storage on JUDAC
    • User Environment Preparation
    • OpenStackClient CLI
      • Useful Examples
    • SWIFT Protocol - Manage objects and containers
    • S3 Protocol - Manage objects and containers
      • S3 Environment Preparation
      • S3 Object Examples
    • 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)
      • The Nodeum Tool
    • Task Handling
      • List all created tasks
      • Execute a new task
      • Types of Data Transfer Tasks
      • Run copy task and display task status
    • Miscellaneous
      • Use --working-dir to adjust destination tree structure
      • Use relative path -working-dir
  • 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
      • How to access largedata on a limited number of computes within your jobs?
      • What file system to use for different data?
      • What data quotas do exist and how to list usage?
      • How to modify the users’s environment.
      • How to make the currently enabled budget visible:
      • How can I recall migrated data?
      • How can I see which data is migrated?
      • How to restore files?
        • Linux commands to manage ACLs
        • Which files have an access control list?
      • How to avoid multiple SSH connections on data transfer?
      • How to ensure correct group ID for Your project data?
      • Information about Maintenance JUNE 10-12, 2024
  • Maintenance
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