Access and Login to the Linux-Cluster

This document provides information on how to get first-time access to the Linux Cluster, how to login to the cluster and addresses topics concerning the login procedure (ssh, password, two-factor authentication).

• Acknowledgment of Cluster and DSS use — Find here the formulation for acknowleding the resources and the support provided by LRZ.
• Compact Guide to first-time Linux Cluster Access Process — Please read here to learn more about getting an account for the Linux Cluster System at LRZ!
• CoolMUC Web Portal — The CoolMUC Web Portal https://ood.hpc.lrz.de is an Open OnDemand https://openondemand.org/-based web service that allows access to various services through a graphical user interface (GUI).
• Linux Cluster General Security Policies
• Two-Factor Authentication on the Linux Cluster — This document explains how to configure 2FA for Linux Cluster access and provides important advices.

File Systems and IO on Linux-Cluster

This document gives an overview of background storage systems available on the LRZ Linux Cluster. Usage, special tools and policies are discussed.

Job Processing on the Linux-Cluster

• Guidelines for Resource Selection — This page serves as a general guidline for setting up compute jobs. It covers topics such as the selection of compute resources, job run time, memory and I/O requirements.
• Policies on the Linux Cluster — We kindly ask users to consider our policies on the login nodes and the job processing rules described here.
• Running interactive jobs on the Linux Cluster — This page describes how to set-up and start jobs on the interactive partitions cm4_inter and teramem_inter, providing essential commands and basic examples.
• Running large-memory jobs on the Linux Cluster — This document describes how to use the Teramem system to process large-memory jobs, providing a step-by-step recipe and a typical usecase example.
• Running parallel jobs on the Linux Cluster — This document briefly describes how to set-up and start parallel batch jobs on the parallel partitions cm4_std and cm4_tiny. A step-by-step recipe, essential Slurm commands and full examples are provided.
• Running serial jobs on the Linux Cluster — This document briefly describes how to set-up and start serial (using 1 CPU core) or very small parallel batch jobs on the cluster serial. A step-by-step recipe, essential Slurm commands and full examples are provided.
• Slurm Command Examples on the Linux Cluster — This document lists common Slurm commands for job submission, job manipulation or obtaining job and cluster information on CoolMUC-4.

Linux Cluster Segments

System overview.

• CoolMUC-4

Linux Cluster Status

This document provides status information on the Linux Cluster, e.g. current node usage or workload on the partitions of each cluster segment.

• Linux Cluster node usage
• Linux Cluster SLURM partition usage
• Linux Cluster Usage Statistics