Data storage concept
After login suceeded, your university wide home
folder will be mounted. This happens on the login- and on each compute node.
Thus, on both the HPC-systems the same home
folder is available.
At the compute nodes, however, it is not recommended to access the home
folder, for performance reasons.
Instead, on each HPC-system an additional high performance storage is provided, which is optimized for a parallel usage.
magnitUDE
On magnitUDE each user has a personal folder on the high performance storage.
This folder has the path /scratch/$USER
. Whenever possible, users should access the /scratch/$USER
for performance reasons.
The variable
$USER
is resolved to the users login name. To see yours you may executeecho $USER
on the magnitUDE.
Warning: Data stored on your /scratch/$USER
space are subject to the delete schedule described in the Nutzerrichtlinien. Be sure to download and backup your valuable scientific data regulary.
amplitUDE
On amplitUDE the data storage concept on the high performance storage has been extended due to the experiences from magnitUDE.
Each user has a permanent (as long the access to ampitUDE is granted) storage (HPC_HOME
) area and a temporary scratch space (SCRATCH
), which keep data for a limited time. Both can be easily accessed using the environement variables $HPC_HOME
and SCRATCH
.
HPC_HOME
permanent project data (e.g. program binaries, final results)
automatically created when access to amplitUDE is granted
0.5 TB user quota
SCRATCH
Parallel file system for computations, temporary working data
individual folders limited in time, user manged by workspace environement, see -workspace docu-
10 TB user quota
To see current used quotas:
lfs quota -u $USER /lustre/ -h
Disk quotas for usr abc123d (uid 123):
Filesystem used quota limit grace files quota limit grace
/lustre/ 2.677G 10.4T 10.5T - 103178 0 0 -
lfs quota -p $(id -u $USER) /lustre/ -h
Disk quotas for prj 123 (pid 123):
Filesystem used quota limit grace files quota limit grace
/lustre/ 2.677G 450G 500G - 103176 0 0 -
Summary
Table with summary
=== TBA ===