Modules are a convenient way to provide access to applications on the cluster. They prepare the environment you need to run an application.
For a full list of module commands run man module
||Lists all available modules. (only Mahuika)|
||Searches available modules for [module name] (only Mahuika)|
||Shows information about [module name]|
||Loads [module name]|
||Lists currently loaded modules.|
Before submitting a job to the scheduler it is good practice to run a small test of your code first to confirm there are no errors.
You are allowed to use the login node for this purpose, provided the resource usage is minimal.
Jobs on Mahuika/Maui are submitted in the form of a batch script containing the code you want to run and a header of information needed by our job scheduler Slurm.
Creating a batch script
Create a new file and open it with nano myjob.sl
#!/bin/bash -e #SBATCH --job-name=SerialJob # job name (shows up in the queue) #SBATCH --time=00:01:00 #Walltime (HH:MM:SS) #SBATCH --mem=3000 # Memory in MB
pwd #Prints working directory
Copy in the above text and save and exit the text editor with 'ctrl + x'.
Jobs are submitted to the scheduler using;
You should receive an output
Submitted batch job 1748836
The currently queued jobs can be checked using
You can filter to just your jobs by adding the flag
squeue -u usr9999
Where 'usr9999' is replaced with your username
You can check all jobs submitted by you in the past day using;
Or since a specified date using;
sacct -S YYYY-MM-DD
Each job will show as multiple lines, one line for the parent job and then additional lines for each job step.
scancel [jobid] Will cancel job described by [jobid], the jobid can be obtained by using sacct or squeue.
scancel -u [username] Kill all jobs submitted by you.
On job completion files will be added to the directory the job was submitted to;
slurm-[jobid].out containing standard output.
slurm-[jobid].err containing the standard error.