1. Hodor HPC Cluster LON MNG HPN Head Node Comp Node Comp Node Comp Node
Parallel Storage

2. Hodor HPC Cluster Head Node 2 CPUs – 8 Cores - SandyBridge 64GB RAM
Module Files
Open MPI, Intel MPI
GCC, Intel COMPILERS
SLURM Job Scheduler
Head Node
HPN
MNG
LON
Comp Node
Parallel Storage

3. Hodor HPC Cluster Head Node Must Request an Account Authentication
Campus Connection
File Transfer
SCP
SFTP
Globus
Compile
Very Short Test Runs
Do not USE mpirun / mpiexec
Head Node
HPN
MNG
LON
Comp Node
Parallel Storage

4. Hodor HPC Cluster Head Node SSH Keys Are Allowed Must Append new keys
Replacing keys will break your account
Must be on-campus to connect
Or use Campus VPN
Incorrect password attempts will block user access.
Head Node
HPN
MNG
LON
Comp Node
Parallel Storage

5. Hodor HPC Cluster Compute Nodes x 32 2 CPUs – 4 Cores – SandyBridge
16 Nvidia Tesla K20m GPUs
16 Xeon Phi 31P1s Co-processors
64GB RAM
Module Files
Use “srun” to get Bash Shell
Head Node
HPN
MNG
LON
Comp Node
Parallel Storage

6. Shared File Space /home/user.name /share/apps /cm/shared Not Shared
/tmp
Heavy I/O should be done in:
Must be copied before end of job.
Head Node
HPN
MNG
LON
Comp Node
Parallel Storage

7. SLURM Queue Information Commands
squeue
sinfo
qstat –a
qstat –n
qstat –f

8. SLURM Job Submission Commands
srun – for interactive - use of “screen”
sbatch - for batch runs

9. SLURM Job Submission Commands
Examples: /share/apps/slurm/examples sbatch somescript.sh srun –N1 –n --pty bash

10. Important sbatch arguments
#SBATCH –N8 #SBATCH --ntasks-per-node=8 #SBATCH –t 00:10:00 #SBATCH –o ./out_test.txt #SBATCh –e ./err_test.txt

11. Important sbatch environment variables
$SLURM_SUBMIT_DIR
Path from current dir when sbatch was invoked.
$SLURM_NTASKS
Total number of tasks in your job
$SLURM_JOB_ID
ID number identifying your SLURM job.

12. SLURM Job Delete Commands
scancel ####
qdel ####

13. Modulefile Commands
module avail
module load
module list

14. www.crc.und.edu Website: Hodor Help Info
Tutorials & Desktop Software > Linux HPC Cluster (Hodor)
Hodor does not have a job submission queue called “test”

15. Get Hodor Account
Send to: