Slow home direcotories
Someone seems to be running something very I/O-heavy from the home directories. We are looking for these jobs and will terminate them if found, but it's less than certain that we'll find them.
We found the guilty jobs and are termintating them and have notified the user not to do that again.
Accident on Irma caused jobs to fail with status NODE_FAIL
We sadly inform you that today at 17:02:37 a human error caused the compute nodes on Irma to reboot. The jobs running was canceled and will show up with status NODE_FAIL. The accident occured while investigating an issue with the storage network. We are very sorry about this.
UPPMAX shutdown due to cooling failure -- FIXED
lupus failover issue -- FIXED
Maintenance indication in output from command jobinfo
UPPMAX made a small change in "jobinfo" output.
In the REASON column for waiting jobs, "(Maintenance)" is shown for jobs that can not start before the next maintenance reservation.
Please note that maintenance reservations many times are moved forward to next month before the actual maintenance window.
Many Irma compute nodes lost electric power -- FIXED
Three racks of Irma's compute nodes lost power,because an automatic fuse shut down.
Some jobs were lost due to this. We are very sorry about that. Please rerun those jobs that were affected.
It looks like nodes i[167-250] were affected.
So what was the reason? It looks like an ethernet switch diied, possibly short circuited, so the automatic fuse shut down, getting more switches and the compute nodes to go down.
We have error reported to our support vendor. Until the bad ethernet switch has been repaired or replaced, Irma runs with a fewer number of compute nodes.
Update at 0950 hours
Now only nodes i[179-226] are down.
Maintenance window Wednesday 2017-09-06" -- FINISHED
milou2 rebooted August 28
milou2 rebooted Monday 2017-08-28 at 19:51.
Replacing (nearly) all disks on Irma's compute nodes -- DONE
We're restarting irma-q for technical reasons. The slurm queue system may be unavailable for submitting/verifying job status for a few minutes.
milou2 rebooted August 19
milou2 rebooted on Saturday 2017-08-19.
Bianca's storage system Castor had a hiccup yesterday Thursday -- FIXED
Maintenance window Wednesday 2017-08-02 -- FINISHED
Unexpected reboot of Pica at Monday morning.
Restart of two Milou login servers today Thursday
Lower service level during UPPMAX holidays
Part of storage system Pica is still very slow
Pica was partly restarted just now, please look for problems in your job output
UPPMAX had to restart part of storage system Pica, because it worked too slowly with nearly no read/write traffic.
The restart was done a little after 1300 hours.
For Rackham users, this meant that you might have had problems with reading and writing to your home directory.
For Milou users, this meant that you also might have had problems with reading and writing to your home directory. But for Milou users, also reading from /sw (where the modules live) and reading and writing to some project directories were affected.
Please look one extra time for problems in your job output, for jobs running at this time.
We are sorry for the inconvenience.
On Milou and Rackham, very difficult to login or otherwise use /home directories -- FIXED
UPPMAX has problem with an extremely slow access to /sw (where e.g. modules live) and home directories on Milou, and to home directories on Rackham.
Because of that, it is very difficult to login to Milou and Rackham.
We will investigate the source of this problem, and will report any success as updates here.
Update at 1310 hours
We restarted part of Pica, and that solved the problem
Hopefully your jobs will continue without problems, but please be careful and look once extra time for errors in your job output.
SUPR and C3SE website down
SUPR and C3SE websites are down at the moment. This prevents you from using SUPR at the moment. Please try again later
No maintenance planned for today's maintenance window
First (non-holiday) Wednesday of each month is UPPMAX's normal, planned maintenance window.
But today we will do no maintenance.
Next maintenance window is 2nd of August.
Restart of login server milou-f Tuesday morning -- FINISHED
File system mounts of Pica volumes was not working correctly.
This was fixed by a restart of the server. Now it works much better.
We are sorry about any inconvenience for you due to this.
Lost contact with Milou nodes m[1-48] for an hour this morning -- FIXED
From approximately 0800 hours to 0910 hours this morning, an ethernet switch in Milou lost power, making 48 nodes unavailable.
Two jobs got NODE_FAIL when trying to start, and interactive work on these nodes was denied. Otherwise, we seem to have had no problems with the temporary network loss.
Singularity is available
Urgent kernel upgrade -- FINISHED
Today we are performing an urgent kernel upgrade on Milou, Fysast1, Rackham, Irma, and Bianca. Login nodes will be restarted during the day. No running jorbs or queues are stopped. We will update on the progress here in System News during the day.
UPDATE 16:00 - Update completed.
Intelmpi performance issues
Bianca graphical login now working
Uses Thinlinc Web Access. Not X-forwardning.
Bianca's storage system Castor has problems -- FIXED
Maintenance window Wednesday 2017-06-07 -- FINISHED
Rackham is now available
We are happy to announce that UPPMAX's cluster Rackham is now available!
Rackham is now available for all local projects with names starting with "snic2017", and for all new course projects.
First of March we will decommission Tintin, and begin to move all Tintin projects to Rackham. This migration will probably be finished within a few days.
Rackham consists of four login nodes and 304 compute nodes. Each compute node contains two 10-core Intel Xeon CPUs together with 128GB ("thin") or 256GB (fat") of memory. Your project data will be stored on Crex, Rackham's storage system, currently capable of storing 1PB of data. Crex is a high performance file storage system from DDN that uses the Lustre filesystem.
If you are used to Tintin, we ask you to pay attention to the following
* More nodes!
Rackham has 304 nodes (with more on its way!) while Tintin
in the end only had 150 nodes. Do not however assume that Rackham's nodes are identical to Tintin's, they're not. You will find that on Rackham fewer nodes are needed to perform the same work and you will need to adjust your job scripts accordingly.
* More cores!
Rackham has 20 cores per node, a 25% increase from Tintin's 16 cores per node. Remember that when scheduling your node jobs! For the tech interested users: Each Rackham core is an Intel Xeon E5-2630 v4 2.2GHz CPU with 25MB shared memory and a maximum turbo frequency of 3.1 GHz. If the previous sentence means nothing to you don't worry - the only thing you'll need to know is that your core jobs will finish much faster due to the newer generation of CPUs.
An important mention is that if you've built your own applications tailored for Tintin's AMD Bulldozer CPUs you will need to recompile on Rackham to take advantage of the Intel CPUs. Tip: Try compiling using the Intel compilers and tools from "module load intel" and you will likely see a jump in performance. Remember, faster code equals less compute time and less billing of your project core hours.
* More memory!
Each node comes with 128GB of memory (or 6.4GB per core) vs. Tintin's 64GB (or 4GB per core). For the most memory intensive applications you may also request up to 32 fat nodes each containing 256GB of memory.
The biggest differences you will find having your project directory on Crex instead of Pica is:
* No .snapshot directory. If you lost a file you need to contact firstname.lastname@example.org and we will reach into the backups. The .snapshot directory as previously found inside any directory of your project is no longer supported (for you home directory, the .snapshot is still available.)
* Smaller initial storage for your project data. The default size of the project and nobackup areas will be 128GB in total. Applying for more data if needed will be possible.
* We no longer support Webexport.
For Fysast1, Milou, and Tintin, UPPMAX provides a webexport service:
The service is based on some storage space on Pica, that will not be available on Rackham. Rackham has no available space for the webexport service, so it will not be provided.
Lastly, how do you get access to Rackham? If you already have a project on Tintin, UPPMAX will migrate it to Rackham in the beginning of March.
If you don't have a Tintin project and are interested in working on Rackham and Crex, you may apply for a SNIC-project on https://supr.snic.se/round/2017smalluppmax/.
* A note on Software
For a complete list of currently installed software please run after logging in:
As on Milou, you can search for modules with the "module spider" command:
module spider name-of-software
The list of available software will be updated in the coming weeks. At this time we have most of the compilers (icc, mpicc, gcc, gfortan and javac) and interpreters (Python, Perl, R) and software (MATLAB, GAUSSIAN, COMSOL, RStudio) installed. OpenFOAM, VASP and GROMACS have been scheduled for installment and will soon be available. If you are missing software and are unable to install it yourself, you may ask for support at email@example.com.
We look forward hearing your thoughts and feedback on Rackham!