Ares was recently equipped with a new filesystem, which will take over the role of the scratch space. The new filesystem is significantly faster and allows for significant advancement in greatly improves computing efficiency. This This advantage comes at the cost of the reduced maximum size of the scratch space, don't hesitate to contact the helpdesk if this is a significant issue in your case. To fully utilize the new filesystem, we've updated the data retention policy, please consult the information below. New scratch is currently available in early access mode. Both storage systems, new and old, will function for a certain period so that the migration process can go smoothly without interruption of work. Instructions on how to use the new filesystem are included below. In the near futureSoon, the new scratch filesystem will be the default, and the old scratch will be decommissioned. If you choose to use the new scratch space, please don't use intensively the old one at the same time.Please note that the new filesystem is still being tuned and optimized, and periods of reduced accessibility might occur.
Migration timeline:
- 01.01.2025 - The old $SCRATCH space will be switched to read-only mode. All user accounts will be switched to using the new scratch space by default.
- 17.01.2024 - The old $SCRATCH space will be disconnected from the cluster nodes.
Naming convention
The filesystems were named as follows:
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By default, the system works in the same way as before and doesn't change the environment. The environment variable $SCRATCH points to /net/ascratch/poeplepeople/<your login>/ directory. If you want to switch to the new filesystem, please complete the following steps:
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- Files stored in $SCRATCH can be automatically removed after 30 days of not being modified. This point is identical to the old $SCRATCH policy.
- Slurm workdirs, which include $SCRATCHDIR and $TMPDIR for jobs, located in $SCRATCH/slurm_jobdir/<job id>/ can be automatically removed 7 days after the given job is finished.