HPC/Directories
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For reference, here is a summary of related directories:
| Environment variable | Typical value | Shared across nodes | Notes |
|---|---|---|---|
| $HOME | /home/joe | yes | home sweet home |
| $SANDBOX | /sandbox/joe | yes | extra storage, not backed up |
| $TMPDIR | /tmp/pbs_mom/12345.mds01.... | no | job-specfic scratch |
| $PBS_O_WORKDIR | (yes) | the directory qsub was run in; typically used with cd $PBS_O_WORKDIR as first line in a job script
|
$TMPDIR
- is named in the environment variable $TMPDIR (typically: "/tmp/pbs_mom/12345.mds01....")
- resides on local disk on each node
- typically provides about 100 GB of space
- is the same for [MPI] processes on the SAME node (as many as given in "ppn=…")
- (i.e., PBS job-specific, not Unix PID-specific)
- is not shared across nodes
- will be wiped upon job exit