1594483 : Request for Storage Space Allocation on /data/dust/user/

Created: 2026-04-21T13:04:58Z - current status: new

Anonymized Summary: A user requests the creation of a personal directory under /data/dust/user/ on the Maxwell cluster and allocation of 1 TB (or more) of storage space for running SRW simulations and storing large datasets.

Solution & Next Steps:

  1. Directory Creation & Storage Allocation:
  2. The /data/dust filesystem is managed by DESY IT (contact: maxwell.service@desy.de).

  3. Users cannot directly create directories or request quota increases in /data/dust/user/. Instead:

    • Submit a request to maxwell.service@desy.de with:
    • Justification (e.g., SRW simulations requiring large temporary storage).
    • Estimated storage needs (e.g., 1 TB).
    • DESY IT will create the directory (e.g., /data/dust/user/[USERNAME]) and allocate space if approved.

  4. Alternative Storage Options:

  5. Scratch (/scratch or /tmp): Temporary, unmanaged space (subject to automatic cleanup). Suitable for short-term simulations. No quota requests needed, but data may be deleted without notice.
  6. Group-Specific GPFS (e.g., CFEL, EXFEL, FS GPFS): If affiliated with a group/experiment, request access via the respective admins (e.g., it-asap3@desy.de for PETRA III/FLASH).

  7. dCache (/pnfs/desy.de/): For long-term archival (not ideal for active simulations).

  8. SRW-Specific Recommendations:

  9. Use /data/dust for temporary/reproducible data (e.g., intermediate simulation outputs).
  10. For persistent data, leverage group-specific GPFS or dCache (if available).

**Action Required by