Scratch File System

Picotte currently has 175TB of all-flash storage using the BeeGFS parallel file system that provides high-speed concurrent access to files during computation.

BeeGFS on Picotte

The BeeGFS scratch filesystem is mounted on all nodes at /scratch. This is a symbolic link to /beegfs/scratch.

Per-Job Automatically Created Scratch Directory

Slurm automatically creates a directory on BeeGFS for every job that runs. That directory is named /scratch/$SLURM_JOB_ID

That path is also available in the evironment variable $BEEGFS_TMPDIR

At the end of a job, this directory and its contents are automatically deleted with no possibility of recovery.

Personal Directory

You can create your own directory for short term use (but longer than just a single job):

[juser@picotte001 ~]$ mkdir /scratch/juser

Cleanup and Retention

Files in /scratch are automatically deleted once they are about 45 days old.

DO NOT store any data that you intend to retain for the long term in /scratch!