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CodeRefinery workshop on software develpment tools in September/October 2025

The CodeRefinery series of workshops (The CodeRefinery's website) could be of interest to those engaged in developing and maintaining research codes.   These workshops focus on tools used for code development, code testing, software deployment, software licensing and many things more.   The material is distributed onto a number of online workshops starting on the 9th of September and running until

https://www.lunarc.lu.se/article/coderefinery-workshop-software-develpment-tools-septemberoctober-2025 - 2026-05-01

Limited availablity of COSMOS GPU nodes

Due to ongoing cooling issues, most COSMOS GPU nodes are currently unavailable.  Currently there are currently only two nodes with NVIDIA A100 cards and Intel processors available for GPU computing.   Check the LUNARC user guide (Read the docs website) for instructions on how to use these nodes using the batch system.   Unfortunately long queueing times are expected.LUNARC's on-demand applications

https://www.lunarc.lu.se/article/limited-availablity-cosmos-gpu-nodes - 2026-05-01

Debugging of HPC applications, 7 October 2025

Resolving problems in HPC applications, in particular parallel applications, can be a complicated and time consuming task. Modern code development tools greatly assist developers, when resolving common issues such as code crashes, wrong results, memory corruption and deadlock. This seminar we will provide an introduction to the Linaro DDT (formerly known as ARM DDT and Allinea DDT) debugger, which

https://www.lunarc.lu.se/article/debugging-hpc-applications-7-october-2025 - 2026-05-01

An introduction to the UNIX/LINUX command line, 22 September 2025

This training seminar provides a first introduction to the UNIX/LINUX environment.  It is aimed at new users of UNIX and will discuss UNIX skills required to work on a typical HPC cluster, such as provided by LUNARC, NAISS, and other Swedish Universities.  Topics include manipulating files and directories, editing file contents and the development of simple scripts, such as required for job submis

https://www.lunarc.lu.se/article/introduction-unixlinux-command-line-22-september-2025 - 2026-05-01

An introduction to parallel programming using Message Passing with MPI, 16, 17, 23 and 24 September 2025

Message Passing is presently a widely deployed programming model in massively parallel high performance computing. Message Passing is suitable for programming a wide range of current computer architectures, ranging from multi-core desk top equipment to the fastest HPC systems in the world, offering several hundred thousand processing elements.This online course is at the beginners level and assume

https://www.lunarc.lu.se/article/introduction-parallel-programming-using-message-passing-mpi-16-17-23-and-24-september-2025 - 2026-05-01

Cluster architecture and job submission, 2 September 2025

This event explains key features of a contemporary HPC cluster, such as deployed within NAISS and by LUNARC.  It will explain the principles behind the job scheduler and how the scheduler can be used to accomplish your computational work in an efficient manner.  The examples will utilise the SLURM scheduler, which is deployed on the NAISS and LUNARC resources.The event is organised as an online se

https://www.lunarc.lu.se/article/cluster-architecture-and-job-submission-2-september-2025 - 2026-05-01

Running jobs on clusters, 25 November 2025

This event explains key features of a contemporary HPC cluster, such as deployed within NAISS and a number of Swedish universities.  It will explain the principles behind the job scheduler and how the scheduler can be used to accomplish your computational work in an efficient manner.  The examples will utilise the SLURM scheduler, which is deployed on the NAISS and university resources.The event i

https://www.lunarc.lu.se/article/running-jobs-clusters-25-november-2025 - 2026-05-01

Array computing in C++ using Eigen, 5 March 2026

This course introduces students to high-performance array computing in C++ using the Eigen library, a versatile template library for linear algebra, matrices, and vectors. Participants will learn to leverage Eigen's expressive syntax and optimized computations for efficient numerical operations. The course covers fundamental concepts such as matrix operations, vector manipulations, and array broad

https://www.lunarc.lu.se/article/array-computing-c-using-eigen-5-march-2026 - 2026-05-01

COSMOS login re-enabled

Login on LUNARC's Cosmos system has been re-enabled after updating the system software for a security vulnerability. User wishing to connect should do so.  If you encounter issues, please report to LUNARC support form (on supr.naiss.se).Unfortunately some jobs running on COSMOS have been lost and the affected users need to re-submit these jobs.Once again, LUNARC apologises for any inconvenience ca

https://www.lunarc.lu.se/article/cosmos-login-re-enabled - 2026-05-01

LUNARC HPC desktop (ThinLinc) re-enabled after security upgrade

The LUNARC HPC desktop also referred to as "ThinLinc" has been re-enabled after resolving the security issues.  For more information on the HPC desktop, please connect to our user guide:Section on the LUNARC HPC desktop in the user guide (on readthedocs.io)If you encounter issues or have questions, please contact LUNARC support using our support page:Accessing LUNARC support via the support page

https://www.lunarc.lu.se/article/lunarc-hpc-desktop-thinlinc-re-enabled-after-security-upgrade - 2026-05-01

LUNARC service stop: 8-10 June 2026

There will be a service stop for all LUNARC systems from 8th until 10th of June 2026.  The service stop is scheduled to start at 8:00 in the morning of the 8th of June and systems are expected to be back in service at 17:00 on 10th of June.  The service stop is required to facilitate various upgrades to the LUNARC infrastructure, which can not be accomplished during normal user service. During the

https://www.lunarc.lu.se/article/lunarc-service-stop-8-10-june-2026 - 2026-05-01

Supporting Research in Practice: Workflows, Challenges, and Needs, May 2026

Researchers use LUNARC in different ways, for example to work with larger datasets, run computational analyses, or access specialised software and environments.  LUNARC is currently exploring how web-based research environments can better support different research practices across disciplines at Lund University. As part of this work, we are organising a small, exploratory workshop where researche

https://www.lunarc.lu.se/article/supporting-research-practice-workflows-challenges-and-needs-may-2026 - 2026-05-01

LUNARC User Survey 2026

We are currently working to improve our services and explore new ways of making advanced computational tools more accessible. This survey aims to better understand the needs of both current users and potential new users with no current experience of LUNARC resources.The results will be used to:Guide the development of future servicesIdentify short comings in current resource provisioningThe survey

https://www.lunarc.lu.se/article/lunarc-user-survey-2026 - 2026-05-01

Login to COSMOS and COSMOS-SENS re-enabled, service restored

Service and login has now been restored on COSMOS and COSMOS-SENS.Due to the nature of the issue, it was necessary to reboot the compute nodes as well. As a result, some running jobs were unfortunately terminated.We apologise for the disruption this has caused and appreciate your patience. The system is now available for normal use.— The LUNARC Team

https://www.lunarc.lu.se/article/login-cosmos-and-cosmos-sens-re-enabled-service-restored - 2026-05-01