HPC2N
High Performance Computing Center North
There is an electrical maintenance windows from Sunday 2026-11-08 08:00 until Monday 2026-11-09 13:00.
Due to this the login nodes for Kebnekaise will be down from Sunday 2026-11-08 08:00 to Monday 13:00.
This means that no jobs will be running during that period, and jobs that would run into that time frame will not be allowed to start.
The main login node of Kebnekaise (kebnekaise.hpc2n.umu.se) is currently unavailable due to a pending reboot.
It will reboot 2026-10-20 07:30 and should be available again before 08:00, i.e. after ~30 minutes.
In the meantime you can use kebnekaise-amd.hpc2n.umu.se as a login node or our ThinLinc or OpenOnDemand portal to access the system.
See docs.hpc2n.umu.se for details on ThinLinc and OpenOnDemand
*UPDATE 2026-10-20 07:50*
The node is now online again
We are currently having some problem with the parallel file system on Kebnekaise (the one with home directories and most of the projects)
We have currently disabled all batch queues from starting new jobs to not cause problems for new jobs starting.
We trying to resolve this as fast as possible.
*UPDATE 2026-10-05 08:30*
Problem is now fixed and queues are running again.
We have a maintenance window on Kebnekaise 2026-09-22 - 25.
We will upgrade the batch system and the batch server.
The update requires updates to the database in two separate steps and will thus take quite a long time.
All accesses to Kebnekaise will be unavailable during this maintenance window, no batch jobs running, no logins available, including the OpenOnDemand portal.
Follow this page for progress information.
*UPDATE 2026-09-24 11:30*
We are now mostly done.
Login access to kebnekaise.hpc2n.umu.se is open.
On Thursday 20260827 starting at 19:00 there will be a maintenance on some network equipment that will cause temporary interrupts in connectivity to, and inside, HPC2N.
We expect this to take <3h.
We're currently having some problems with Keycloak that is used to login to OpenOnDemand
We're working to fix it as fast as possible.
*SOLVED 20260826 10:24*
Problem is now solved
There is currently a problem with the OpenOnDemand portal.
We're working on the problem and will note here when we can sort it out.
*SOLVED 20260819*
The problem with RStudio has been sorted out and evetything should now work again
On Wednesday 2026-06-24 we will start an online upgrade of the storage system that contains users home directories and all project storage directories under /proj/nobackup.
/proj/cfl_nobackup will NOT be affected.
The upgrade will temporarily cause reduced performance and delays when accessing the file system.
To minimize problems with batch jobs the queues will from time to time be stopped from starting new jobs, but submitting new jobs will still work.
We will try to keep the impact to a minimum.
***UPDATE 2026-06-24 12:50***
Apply no later than 30 June if you want project proposals processed before summer as nothing is processed during July.
Proposals will start being processed again in the first week of August.
You find the project rounds here in SUPR: https://supr.naiss.se/round/
Happy summer!
Kebnekaise is experiencing intermittent performance issues and slowdown caused by a load problem with one of the servers of Lustre Object Storage Service (for our file system). The vendor, DDN is working on it.
We will keep you updated in this news.
