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Supercomputer LEO5 - Distributed Memory CPU and GPU Cluster of the ZID (IT-Services)

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Table of contents

1. Overview

Leo5 is a high performance CPU and GPU compute cluster operated by University of Innsbruck IT services in cooperation with the Research Area Scientific Computing.

For details, see LEO5: Introduction and Overview

2. Applying for User Accounts

Note: all active LEO accounts are automatically activated for Leo5.

The application process is described in detail on the UIBK HPC main page, section 2.

Note in particular the description of Applying andAcknowledgments.

3. Using the Cluster

All HPC clusters at the University of Innsbruck hosted at the ZID are set up in a similar way. Please do take the time to read the guidelines carefully, in order to make optimal use of our HPC systems.

3.1 First Time Instructions

See this quick start tutorial to jump the first hurdles after your account was activated:

  • Login to the cluster
  • Change your password
  • Copy files from and to the cluster

3.2 Setting up the Software (Modules) Environment

We offer many software packages, typically in an increasing number of versions over time, driven by user demand. In order to utilize these efficiently and to avoid inter-package conflicts, we employ the Environment Modules package on all of our cluster systems.

See the modules environment tutorial to learn how to customize your personal software configuration.

For some more information on differences between the previous LEO clusters and LEO5, please look at the LEO5 introduction and overview.

3.3 Submitting Jobs to the Cluster

Load management on Leo5 is handled by the Slurm workload manager.

See the SLURM usage tutorial to find out how to submit your jobs to the Slurm batch scheduler.

4. Storing Your Data

Every time you login to the cluster, your quota and usage of available file systems are automatically displayed.

You may store your data in two areas:

  1. $HOME provides you with a small storage area, which is backed up every day. This is the place to store your important data, such as source code, valuable input files, etc. In addition to central backup, bi-hourly snapshots allow you to access previous versions of your data for up to eight weeks in the past (with increasing time granularity).
  2. $SCRATCH is a large and high performance area space for large data sets. Use this storage for input datasets, intermediate storage and output data of your jobs. Please note that, while this file system is safeguarded against loss of individual disks, users are advised to create regular backups of valuable data stored in $SCRATCH, since multiple disk failures leading to data loss cannot be completely excluded.

5. Available Software Packages

On each of our clusters we provide a wide variety of software packages, such as compilers, parallel environments, numerical libraries, scientific applications, utility programs, etc.

List of currently available software on LEO5

6. Known Problems and Configuration Changes

For your reference, we keep a list of known problems and configuration changes for Leo5 hardware and software.

7. Contact

For contact informations please visit our contact page.

8. HPC Specific Software Documentation

  • Gen­eral Pur­pose GPU Pro­cess­ing On The UIBK Leo Clus­ters

    Information on using GPU nodes in the UIBK HPC Leo clusters.

  • Mat­lab

    MATLAB is a high-level language and interactive environment for algorithm development, data visualization, data analysis, and numeric computation. This document depicts methods and strategies for using matlab efficiently on the HPC systems of the University of Innsbruck.

  • Mon­i­tor­ing Pro­cesses Using The Jobtop Util­ity

    Monitoring processes belonging to a job is a key factor in optimizing your workloads for a HPC cluster. This document describes how to use the locally developed jobtop facility allowing to run a specially configured top command on all cluster nodes that run processes of a given job.

  • Qiskit
  • Set­ting up Your Win­dows PC With Putty and Xming

    This document describes how to set up the software on a Windows desktop or notebook necessary for an efficient user experience of central Linux servers. Covered items: Putty terminal emulator, Xming X11 server, settings for Putty and Xterm terminal emulators.

  • Sin­gu­lar­i­ty: User Defined Soft­ware Envi­ron­ments

    Singularity is an environment for running user-defined software stacks such as Docker containers on HPC clusters.

  • Totalview Debug­ger

    The TotalView Debugger is a graphical tool for debugging sequential and parallel (MPI, OpenMP, POSIX threads etc.) programs.

  • Using Ana­conda for Python and R (ob­so­lete 2025)

    Anaconda is a comprehensive, curated, high quality and high performance distribution for Python, R, and many associated packages for Linux, Windows, and MacOS, intended for use by scientists.

9. Statement of Service

Maintenance Status and Recommendations for ZID HPC Systems

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