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File system + mount point

Environment Variable for Access

PurposeType and SizeBackup and snapshotsIntended lifetime, cleanup strategy Quota

/home

$HOME

Store source files, input data, small files

Globally accessible from login and compute nodes

GPFS, 100TB

backup to tape and snapshots

Account lifetime

100GB

per user

/work

$WORK 

Collaboration space for a group.
Common software, result files and data sets

Globally accessible from login and compute nodes

GPFS, 100TB

Backup upon request, at cost price.

Snapshots

3 years

50GB*

per group

/scratch

$SCRATCH 

Temporary huge result files

Accessible from the frontend and compute nodes within one cluster.

Deneb:
GPFS, 350TB

Fidis:
GPFS, 375TB

Helvetios:
GPFS, 186TB

No backup, no snapshots

2 weeks

Automatic deletion of files and empty directories older than two weeks may happen without notice

Quotas may be in place to prevent runaway tasks filling the filesystem. A typical limit would be 1/3 or 1/2 of the total space.

/tmp/${SLURM_JOB_ID}

$TMPDIR

Temporary, local file space for jobs on compute nodes.

Not available on login nodes.

local (node), between 64 and 512 GB

No backup, no snapshots

Job execution

content is deleted after job end

no

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/work storage creation requests

The price for work is 300 CHF per TB/year, usually sold for 3 years, and can be found in our website:
https://www.epfl.ch/research/facilities/scitas/getting-started/prospective-users-howto/

Each group can have 50GB for free.

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