University of Groningen https://wiki.hpc.rug.nl/ 2026-04-30T00:31:41+00:00 https://wiki.hpc.rug.nl/ https://wiki.hpc.rug.nl/_media/wiki/logo.png text/html 2026-04-19T16:51:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.hpc.rug.nl/habrok/additional_information/changelog?rev=1776617499&do=diff Hábrók Changelog This page records major changes to Hábrók, which are mostly carried out during scheduled maintenance periods. This changelog is kept since August 13th 2025, although changes have been made during past scheduled maintenance periods and on-demand as necessary. text/html 2026-04-10T12:22:41+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.hpc.rug.nl/habrok/additional_information/course_material?rev=1775823761&do=diff Course material * Large scale computations and data analysis on the Hábrók cluster (Basic) * Details * [Slides] * Exercises * Exercise files * Research Support Hub - Working with Python on Hábrók - NEW! * Details * Slides and exercises * Large scale computations and data analysis on the Hábrók cluster (Advanced) text/html 2023-04-20T08:59:12+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.hpc.rug.nl/habrok/additional_information/faq?rev=1681981152&do=diff Frequently Asked Questions How can I see how my job performed? The command jobinfo is able to give you relevant information about the performance of your job. For example you ran a job with the job ID 12345. Then use the following command in order to see this information: text/html 2026-04-14T17:38:25+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.hpc.rug.nl/habrok/additional_information/hostkey_fingerprints?rev=1776188305&do=diff Host keys Each computer you connect to has a host key, which is intended to be its unique identifier and this is true for Hábrók's access nodes. Checking a server's host key ensures that you are not inadvertently connecting to a system posing as Hábrók (known as a man-in-the-middle attack) by warning you that you are actually connecting to another machine. text/html 2023-08-30T10:01:33+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.hpc.rug.nl/habrok/additional_information/job_hints?rev=1693389693&do=diff Job hints The jobinfo tool may give hints on improving the efficiency of your jobs. A further explanation of these hints is given below. CPU efficiency In general poor efficiency can have two causes: * The program is not running efficiently because it is delayed by storage operations. text/html 2025-08-14T07:13:53+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.hpc.rug.nl/habrok/additional_information/known_issues?rev=1755155633&do=diff Known issues This page contains a list of known issues, and, if possible, workaround for them. For other kind of issues, please also check the HPC status page. MFA for F-accounts not possible Unfortunately, setting up MFA for F-accounts turns out to be impossible. Instead, external collaborators should get an OEP (externall staff) identity via the HR department. text/html 2023-03-21T14:11:05+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.hpc.rug.nl/habrok/additional_information/maintenance?rev=1679407865&do=diff Maintenance For information about maintenance and (un)scheduled downtime, see the HPC status page. text/html 2026-02-13T14:34:27+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.hpc.rug.nl/habrok/additional_information/scientific_output?rev=1770993267&do=diff Scientific output This page gives an overview of scientific papers that have been produced based on work performed on the Hábrók, Peregrine and Millipede compute clusters of the University of Groningen, or computing work that has been supported by staff of the HPC team of the Center of Information Technology of the university. text/html 2020-08-27T09:31:52+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.hpc.rug.nl/habrok/additional_information/start?rev=1598520712&do=diff Additional information additional_information index