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File System | Suitable for ... | Technology | Features | Quota | ||||||||||
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| HOME | permanent files, e. g. profile, utilities, sources, libraries, etc. | NFS | It is backed up. Snapshots available. See HPC2020: Recovering data from snapshots Throttled I/O bandwidth from parallel compute nodes (less performance) |
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| PERM | permanent files without the need for automated backups, smaller input files for serial or small processing, etc. | NFS | No backup Snapshots available. See HPC2020: Recovering data from snapshots Throttled I/O bandwidth from parallel compute nodes (less performance) DO NOT USE IN PARALLEL APPLICATIONS DO NOT USE FOR JOB STANDARD OUTPUT/ERROR |
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| HPCPERM | permanent files without the need for automated backups, bigger input files for parallel model runs, climate files, std output, etc. | Lustre | No Backup No snapshots No automatic deletion |
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| SCRATCH | all temporary (large) files. Main storage for your jobs and experiments input and output files. | Lustre | Automatic deletion after 30 days of last access - implemented since 27 March 2023 No snapshots No backup |
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SCRATCHDIR | Big temporary data for an individual session or job, not as fast as TMPDIR but higher capacity. Files accessible from all cluster. | Lustre | Deleted at the end of session or job Created per session/ job as a subdirectory in SCRATCH | part of SCRATCH quota | ||||||||||
TMPDIR | Fast temporary data for an individual session or job, small files only. Local to every node. | SSD on shared (GPIL) nodes (*f QoSs) | Deleted at the end of session or job Created per session/ job | On ECS:
On HPC:
To request more space in your jobs you can use the Slurm directive: 40 GB with
For ecinteractive and Jupyterhub sessions, space and limits are shared with LOCALSSD | ||||||||||
RAM on exclusive parallel compute and GPU nodes (*p and *g QoSs) | no limit (maximum memory of the node) | |||||||||||||
LOCALSSD | Fast, local, non-critical data and files used in ecinteractive and JupyterHub sessions. Its contents are automatically archived when the session finishes so users can restore them on their next session and carry on where they left off. Can be used for development/compilation of projects interactively. See HPC2020: Local SSD storage for interactive sessions for more information on how to use this feature. | SSD on shared (GPIL) nodes for ecinteractive and JupyterHub sessions only. (ni QoS) GPU nodes are excluded | Archived automatically at the end of session or job into Recover manually on next session with:
| On ECS:
On HPC:
Space and limits shared with TMPDIR |
| Tip | ||
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Those filesystems can be conveniently referenced from your session and scripts using the environment variables of the same name: $HOME, $PERM, $HPCPERM, $SCRATCH, $SCRATCHDIR, $TMPDIR and $TMPDIR$LOCALSSD. $TEMP, which in the past was an alias to $SCRATCH, has been deprecated and is no longer defined. Please use $SCRATCH instead |
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When running on the shared GPIL nodes (*f and *i QoSs), you may request a bigger space in the SSD-backed TMPDIR with the extra SBATCH option:
With <size> being a number up to 40 GB. If 20 GB on ECS and 100 GB on HPCF. If that is still not enough for you, you may point your TMPDIR to SCRATCHDIR:
Note that on interactive, non-gpu sessions using ecinteractive and Jupyterhub, the local space on disk is shared between TMPDIR and LOCALSSD. |
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You can check your current usage and limits with the "quota" command. |
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