K Siegmund: Created page with " == Pre-Requisite: Get Cluster Access == Follow the registration process for the bwForCluster. → How to Register for a bwForCluster == Pre-Requisite: Know the Workflow of Running Calculations == On a compute cluster, you do not simply run log in and your software, but you write a "job script" that contains all commands to run and process your job and send this into a waiting queue to be run on one of several hundred computers. Ho..."

2026-06-19T11:21:17Z

Created page with " == Pre-Requisite: Get Cluster Access == Follow the registration process for the bwForCluster. → How to Register for a bwForCluster == Pre-Requisite: Know the Workflow of Running Calculations == On a compute cluster, you do not simply run log in and your software, but you write a "job script" that contains all commands to run and process your job and send this into a waiting queue to be run on one of several hundred computers. Ho..."

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== Pre-Requisite: Get Cluster Access ==

Follow the registration process for the bwForCluster.

→ [[Registration/bwForCluster|How to Register for a bwForCluster]]

== Pre-Requisite: Know the Workflow of Running Calculations ==

On a compute cluster, you do not simply run log in and your software, but you write a "job script" that contains all commands to run and process your job and send this into a waiting queue to be run on one of several hundred computers.

How this is done is described in a little more detail here: [[Running Calculations]]

== Login to the Cluster ==

Setup service password and 2FA token and login to the cluster. → [[JUSTUS2/Login|Login JUSTUS2]]

== Online Course on Justus2 ==
* Training course → [https://training.bwhpc.de/goto.php?target=crs_629_rcodeM6n48kAUsT&client_id=BWHPC Introduction to JUSTUS2 ]

== Know the Cluster Rules ==

→ '''[[JUSTUS2/Policy_Agreement]]'''

== Using the Linux Commandline ==

* [[Media:HPC_User_Linux_command_cheatsheet.pdf|HPC User's Linux Cheat Sheet (PDF)]]

* HPC Wiki (external site) → [https://hpc-wiki.info/hpc/Introduction_to_Linux_in_HPC/The_Command_Line Introduction to Linux Commandline]

* Training course → [https://training.bwhpc.de/ilias.php?baseClass=illmpresentationgui&cmd=resume&ref_id=310 Linux course on training.bwhpc.de] (please log in to the training site, then click this link again)

also see: [[.bashrc Do's and Don'ts]]

== Transfer your Data to the Cluster ==

Get familiar with available file systems on the cluster. → [[Hardware_and_Architecture_(bwForCluster_JUSTUS_2)#Storage_Architecture|File Systems]]

Transfer your data to the cluster using appropriate tools. → [[Data Transfer|Data Transfer]]

== Find Information About Installed Software and Examples ==

Compiler, Libraries and application software are provided as software modules. Learn how to work with
[[Environment_Modules|software modules]]. → [[JUSTUS2/Software|Software]]


Run sample script from a pre-installed software (Software job examples in the page above)

== Run your Software in a Batch Job ==

Get familiar with available nodes types on the cluster. → [[Hardware_and_Architecture_(bwForCluster_JUSTUS_2)|Hardware and Architecture]]

Submit and monitor your jobs with Slurm commands.
* → [[JUSTUS2/Jobscripts: Running Your Calculations|Jobscripts: Running Your Calculations]]
* → [[BwForCluster_JUSTUS_2_Slurm_HOWTO| extensive Slurm HOWTO on specific tasks]]

== Learn about Scaling your Job ==

How many compute-cores should my job use? This depends on the software and the problem you are trying to solve. But if you use too few cores, your computation may take much too long - if you use too many cores, they will not improve the speed of your computation and all you do by using more cores is wasting compute resources and energy.

If you run hundreds or thousands of similar calculations, you should look at this carefully before starting.

How to do this is described in: [[Scaling]]

== Acknowledge the Cluster ==

Remember to mention the cluster in your publications. → [[bwForCluster JUSTUS 2 Acknowledgement|Acknowledgement]]

Justus3/Getting Started - Revision history