system news

Abisko back in production

  • Posted on: 20 April 2017
  • By: ake

Abisko is now back in production after the extended maintenance.

Unfortunately a unexpected problem with the upgrade of SLURM caused all pending jobs to be discarded.

We are therefor allowing jobs to be submitted to the old (Precise) part of Abisko for one more week (until April 28th). After that only jobs submitted from the Xenial (abisko-x.hpc2n.umu.se) node will be accepted into the queue.

The system has also been "split" in two halves, one half running Precise the old way, and one half running Xenial and thus only usable from abisko-x.hpc2n.umu.se.

Maintenance on Lustre affecting both Kebnekaise and Abisko on 2017-04-19, 2017-04-20

  • Posted on: 7 April 2017
  • By: ake

On Wednesday April 19th we have a maintenance window from 08:00 to 21:00 to change some Lustre configuration and update Slurm on Abisko.

This affects the /pfs/nobackup filesystem on all batch and login nodes on both Kebnekaise and Abisko.

We must therefore drain the batch nodes of jobs. This means that there will be gaps which can be filled by short jobs during the days before the 19th.

Please do submit short jobs to fill those gaps.

Upgrade of Abisko from Ubuntu Precise to Ubuntu Xenial

  • Posted on: 7 April 2017
  • By: ake

During April we will be upgrading Abisko from Ubuntu Precise to Ubuntu Xenial.

This upgrade will make the environment on Abisko match the one already in use on Kebnekaise.

The reason for doing this is that Ubuntu Precise has End-of-Life on 2017-04-28. (End-of-Life means that after that it will no longer get security updates, bug fixes, etc.)

For more information on the upgrade please see the Abisko: Precise to Xenial migration page.

  • Posted on: 31 March 2017
  • By: ake

Batch queue malfunction on Kebnekaise

  • Posted on: 24 February 2017
  • By: zao

During a routine upgrade of the batch system SLURM on Kebnekaise intended to improve the amount of usable memory on the large memory nodes, we encountered an unexpected malfunction.

This discarded all running and scheduled jobs.

We're working on restoring functionality and will update this system news entry.

Update 2017-02-24 15:42 CET:
The new version of SLURM misbehaves greatly and the commands to interact with it are very slow or not responding at all. You may consider the Kebnekaise cluster down for all practical purposes for now.

Emacs on Kebnekaise

  • Posted on: 23 February 2017
  • By: zao

We have resolved a long-standing problem with Emacs on the kebnekaise login node. If you had any form of X forwarding enabled invoking emacs would result in a segmentation fault which necessitated a workaround by starting it with the argument -nw.

This is no longer necessary as we have patched the offending library, so now you get a properly working graphical Emacs if you have X forwarding. If you wish to run a textual Emacs in such an environment the argument -nw still exists and works as intended.

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Updated: 2018-08-13, 14:22