JLab Farm Information¶

Included below is some information and resources regarding working with the PionLT data on the JLab farm.

General Farm Resources¶

• JLab SciComp Info Pages
  • Tape Storage System Info
  • Auger batch queueing system
    • Note, auger will be replaced by Slurm eventually, we're still using auger for now
• Check Job/Farm Status

Summer 2019 Run Info¶

The Summer 2019 data was stored alongside the earlier KaonLT data. The data can be found in -

• /mss/hallc/spring17/raw/ - Raw data for 2019 PionLT run
• /mss/hallc/kaonlt/ - Analysed data
• /volatile/hallc/c-kaonlt/ - Temporary analysed data

Access to these directories is via the "c-comm2017" group

2021 Run Info¶

For the 2021 PionLT run, a new group was created, along with numerous new directories -

• New unix group: 'c-pionlt'
• New Farm/Auger project: c-pionlt ** Use this Project name for simulation (and later analysis) jobs on the Farm
• Disk resources:
  • /volatile/c-pionlt/ - directory, 6 TB high quota; 2 TB Guarantee
  • /group/c-pionlt/ - directory (100GB quota)
    • snapshotted hourly; backed up automatically, use for analysis scripts, etc.
  • /work/hallc/c-pionlt/ - directory (1TB quota)
    • NOT backed up in any way
    • Has some small-file/performance benefits (but this doesn't really apply to hcana/podd analysis)
    • Not super useful in a modern workflow (mostly historical), but it's there if you want it.
    • Not intended for rootfile output or to store extra copies of CODA files, etc.
    • Good for large source code bases (that are 'backed up' on an external git repo, for example)
    • OK for modestly sized simulation output perhaps, though /volatile is still best.
  • New Tape/disk allocations:
    • /mss/hallc/c-pionlt/raw - tape volume for raw data output
    • /mss/hallc/c-pionlt/analysis - tape volume for analysis output