system news

The GPU nodes of Kebnekaise are temporarily unavailable since the evening of Monday 2018-09-24. Jobs that started after that may have failed with messages about mismatched driver versions and may report missing GPUs.

We are addressing the problem, while work progresses nodes will be unavailable and the queue may report that jobs are blocked due to resources. We will update this news entry when this is resolved.

Kebnekaise running jobs failed 2018-09-05 18:44

Kebnekaise cluster nodes had unexpected problems during the
maintenance of a internal service related to them.

This caused disk access timeouts, which in turn terminated
jobs running on the nodes.

The problem have been solved and the cluster is working
normally again.

We are sorry about the problems this have caused.

We will have a downtime of all our systems Monday, 2018-08-13, 18:00 - Tuesday, 2018-08-14, 10:00.

The reason for this is that there will be a power outage on the entire Umeå Campus, Monday, 2018-08-13, 20:00-24:00. We need some time after this to get all our systems at HPC2N up and running again.

Because of an automatic kernel update on the Skylake and Volta GPU nodes, they failed to reboot afterwards. They need a manually built kernel and we are working on the problem.

Update 2018-07-03 14:00: New kernels built and the Skylake and Volta nodes are up again.

The recently announced expansion to Kebnekaise is now available to users.

Please read the Kebnekaise usage guide for information on how to use the various parts.

The upgrade of Lustre parallel file system (/pfs/nobackup) as well as the rest of the maintenance we have done during the week are now complete. All systems are up and running again, including the batch queues on both Kebnekaise and Abisko. The login nodes are open for acess again.

During the week we have, among other things:

We have a major maintenance to upgrade the Lustre parallel file system (/pfs/nobackup).

One of the goals is to introduce new functionality, for instance project based storage.

We will also do a number of related changes and optimizations to the Lustre file system setup.

We are planning for a full week of complete downtime on all HPC2N systems, including login and thinlinc nodes, starting 2018-06-04 07:30 CEST.

Please make sure to copy any files you want to work with during the downtime to some other system well in advance of the maintenance.

The maintenance window has been moved to March 16th.

On March 16 we will have a maintenance window for upgrading Slurm (the batch system) on both Abisko and Kebnekaise.

We have therefor put a reservation in place on both clusters starting 2018-03-16 08:00.

Jobs will not be allowed to start if their requested runtime reaches beyond that point in time.

So leading up to this maintenance window it is advantageous to submit jobs with smaller runtimes.

We expect to be finished no later than 2018-03-17 17:00.

Due to maintenance, the license servers for Allinea and Matlab will be unavailable for approximately 1/2 hour between 18:00-18:30, 15 February 2018.

TensorFlow 1.5.0 has now been installed on Kebnekaise.

There is both a CPU and a GPU version.

Note that the module has changed name and is now TensorFlow with capital T and F.