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Missing dashboards in Grafana after upgrade
by Nicolai, Wouter 25 Feb '26

25 Feb '26

Hi, I managed to upgrade from 13 to 14 following the upgrade guide, but am missing all predefined dashboard of Grafana. Is there an alternative way to obtain these dashboards? Are the json files somewhere available? Thanks, Wouter

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Security/Bug fix releases 14.1.0, 13.4.0
by no-reply-list＠qlustar.org 21 Feb '26

21 Feb '26

The Qlustar releases 14.1.0 and 13.4.0 are ready including a number of security/bug fixes. Please check the following web pages for details about security fixes and special update instructions: https://qlustar.com/qsa/2026/0220261 https://qlustar.com/qsa/2026/0220262 https://qlustar.com/qsa/2026/0220263 The following non-security related updates/enhancements/bug fixes are included: For Qlustar 13 and 14: - Update to HPC Core Stack 02/26 (see separate announcement) For Qlustar 14 only: - QluMan 14.1.0 * New feature: Node/MAC detection from Switches + Dynamic Node booting * Alerts: - Assign cloned alerts to the new alert config - Force alert names to be unique * Network proxy: - Catch already closed sockets when other side closes the connection - Turn down info message for socket forwarding * slurm: - use nodes visible hostname in slurm config - Re-enable GUI accounting menu when working with 13.x clusters - Only use 256MB MemSpecLimit for demo nodes at install time * qluman-slurmd - Port to new pyslurm API to support slurm 25.05.x - Multiple bug fixes

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Qlustar HPC Core Stack 26.02
by no-reply-list＠qlustar.org 21 Feb '26

21 Feb '26

The Qlustar team is pleased to announce the availability of the HPC Core Stack [1] 26.02 release for Qlustar 13 and 14. It was published together with the latest security bug fix update and can be installed by updating the Qlustar 13/14 chroots on the cluster head-node. This release includes the following individual major HPC core stack component updates: - Spack version 1.1.1 [2] - Slurm version 25.05.6 [3] - RDMA-Core version 61.0 [4] - HWloc version 2.12.2 [5] - UCX version 1.20.0 [6] The new version of Spack allows easy and direct access to the most recent compilers, MPIs and hundreds of other applications relevant to HPC. Amongst others, it includes gcc 15.2.0 and OpenMPI 5.0.8 as new default versions. Please note that starting from version 1.0, Spack has moved to database format v8. This requires reindexing and updating the format of the database. To do this, login on a cluster node as a user with Spack admin rights (usually user 'softadm' or anybody in the group 'softadm') and execute $ spack reindex On Qlustar 14, this release also comes with the following major version updates: - ZFS version 2.3.5 [7] - Lustre version 2.17.0 [8] [1] https://qlustar.com/qlustar/hpc-stack/hpc-core-stack/ [2] https://spack.readthedocs.io/en/latest/features.html [3] https://www.schedmd.com/slurm/ [4] https://github.com/linux-rdma/rdma-core/releases/tag/v61.0 [5] https://www.open-mpi.org/projects/hwloc/ [6] https://openucx.org/ [7] https://github.com/openzfs/zfs/releases/tag/zfs-2.3.5 [8] https://www.lustre.org/lustre-2-17-0-released/

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Qlustar 13 -> 14 update now supported
by no-reply-list＠qlustar.org 30 Dec '25

30 Dec '25

Support for updates of Qlustar 13 clusters to Qlustar 14 are now fully supported. Please consult the update instructions [1]. [1] https://docs.qlustar.com/Qlustar/14/ClusterOS/release-notes.html#_update_in…

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Security/Bug fix releases 14.0.5, 13.3.5
by no-reply-list＠qlustar.org 22 Dec '25

22 Dec '25

The Qlustar releases 14.0.5 and 13.3.5 are ready including a number of security/bug fixes. Please check the following web pages for details about security fixes and special update instructions: https://qlustar.com/qsa/2025/1220251 https://qlustar.com/qsa/2025/1220252 The following non-security related updates/enhancements/bug fixes are included: For Qlustar 13 and 14: - initramfs module * Up unionfs max_files to 131072 For Qlustar 14 only: - core module * Monitoring stack: - Add CPU temperature metrics extracted from Linux kernel/hwmon. - Add support for Dell IPMI temperature metrics. - Add ql_unionfs_open_files metrics to track the # of open files of the main unionfs process of the Qlustar node OS. * disk-auto-setup: Reliably wipe LVM and md-raid stuff

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QluMan GUI running natively on Windows
by no-reply-list＠qlustar.org 01 Dec '25

01 Dec '25

With the release of WSL 2 [1] it has become straight-forward to run the QluMan GUI directly on Windows workstations. We have now added this constellation into our portfolio of tested, verified and supported components. This means that cluster admins working on windows can now follow the corresponding setup guide [2] and enjoy a much improved user experience when working on Qlustar clusters. [1] https://learn.microsoft.com/en-us/windows/wsl/about#what-is-wsl-2 [2] https://docs.qlustar.com/Qlustar/14/ClusterOS/qluman-guide/qluman-guide.htm…

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Qlustar enters Top 100
by no-reply-list＠qlustar.org 21 Nov '25

21 Nov '25

This week at SC 25 in St. Louis, a recently implemented Qlustar 14 AI Kubernetes cluster entered the Top 500 list at rank 90 with a measured Linpack performance of *19.48 PFlop/s*. This huge success establishes Qlustar as a proven platform for even the most demanding work-loads in the AI and HPC universe. The cluster worker nodes are HGX machines each of them hosting 8 NVIDIA H100 (80GB HBM3) GPUs which are networked in a rail-optimized fat-tree NDR Infiniband fabric. Qlustar's new NVIDIA image modules support this hardware out-of-the-box with optimal performance. The *Qlustar Kubernetes stack* powering this cluster will become GA and be officially introduced in an upcoming Qlustar 14 feature release. [1] https://top500.org/system/180424/

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Qlustar Feature Update 11/25
by no-reply-list＠qlustar.org 21 Nov '25

21 Nov '25

A large bunch of new features were completed and published since the Qlustar 14 release, both in QluMan as well as for Nvidia Enterprise GPU support. Please consult the comprehensive overview at https://qlustar.com/news/2025/2025-11-21-feature-update-11-25

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ssh server and oom_score_adj
by Rolandas Naujikas 13 Nov '25

13 Nov '25

Hi, Recently I found that our login nodes are abused with users running heavy nodejs sessions (from visual studio code). I setup some memory limits for users and OOM is coming, but cannot kill users processes, because all of them are with oom_score_adj=-1000. It is coming from parent sshd server also with oom_score_adj=-1000. As a workaround I'm stopping traditional ssh server and starting ssh.socket at boot (via rc.boot script). Now oom_score_adj=0 as it should be. That is also important for computing nodes with ssh connection enabled. Regards Rolandas P.S. We are still on Qlustar 13, so I don't know situation on Qlustar 14, but it could be different because ssh connection in Ubuntu 24.04 LTS is activated via ssh socket already.

2 3

Add users from command line
by Rolandas Naujikas 11 Nov '25

11 Nov '25

Hi, Do there is some way to add/manage users in Qlustar 12/13/14 from command line ? Some admins have difficulties to run qluman GUI. Could it be done via Qluman router API ? Regards Rolandas

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