To view file quotas, use checkquota. If we are in danger of running low, inform me as soon as possible so we can take prompt action.
Title
Shared Home
Shared Scratch
Shared Work
Tiger
/home/ROSENGROUP
/scratch/gpfs/ROSENGROUP
/tigerdata/rosen/work
Della
/home/ROSENGROUP
/scratch/gpfs/ROSENGROUP
/tigerdata/rosen/work
Neuronic
N/A
/scratch/rosengroup
/n/fs/rosengroup
Adroit
N/A
/scratch/network/ROSENGROUP
/tigerdata/rosen/work
Home Directories
You have a /home/<NetID> directory, which is the same as doing ~/ and is where you log into when accessing the machine. On Tiger and Della, we also have a shared group home directory that contains group software and module files that are accessible to all group members. Anything in /home/ROSENGROUP/software/common/bin is automatically added to the PATH of all group members. Anything in /home/ROSENGROUP/Modules/modulefiles-shared is automatically available as a module.
The /home directory — both your own and that of the research group — is limited in terms of file storage but is backed up by Research Computing. In general, /home should not be used to store or interact with research data. It is much slower than /scratch/gpfs and relatively small.
Scratch Directories
The scratch directory (see table above) is where your calculations should be run. It is a fast, NFS-mount disk space with a generous storage capacity. The scratch space — by definition — is not backed up and is not meant for long-term data storage. On Tiger and Della, the scratch space is not purged, but if you accidentally delete the data or the system dies, the data will be gone forever. On Neuronic, data in the /scratch directory is automatically purged after two weeks.
Work Directories
When calculations finish, files need to be copied or moved from the scratch directory to a semi-permanent working directory. On Tiger and Della, the work directory is the TigerData service, which is backed up. It can be found at /tigerdata/rosen/work. While the working directory is backed, it is less performant than the scratch directory. If significant I/O operations need to be done, copy or move the data back to the scratch directory. Regardless, never run calculations in the TigerData working directory. We currently have 10 TB of space in TigerData, but we can request more if needed.