The Abel computer cluster

Named after the famous Norwegian mathematician Niels Henrik Abel (1802 – 1829), the Linux cluster at UiO is a shared resource for research computing capable of 258 TFLOP/s theoretical peak performance. At the time of installation Abel reached position 96 on the Top500 list of the most powerfull systems in the world.

Abel is an allround, allpurpose cluster designed to handle multiple concurrent jobs / users with varying requirements. Instead of massively parallell applications, the primary application profile is for moderately to smaller parallel applications with high IO and/or memory demand. Frequent users of Abel are from the life sciences, astrophysics, geophysics, chemistry and also humanities. All compute nodes on the cluster have a minimum 64 GB RAM, 16 physical CPU cores and are connected by FDR (56 Gbps) Infiniband.

Abel is a joint investment by the Research Council of Norway and UiO, and access is primarily through the Notur project. The cluster is available to all researchers.



Please use hpc-drift at for your questions and requests.


Abel operational log

  • Maintenance finished Oct. 6, 2016 03:37 PM

    Dear Users,

    The maintenance on Abel is now finished, and we are back in production again. You should be able to log in and submit jobs again. Jobs that were pending due to the maintenance are now running.

    Thank you for your patience.

    Please note that we have gotten a new ssh host key on the login nodes, so you _will_ get a message like this:

    @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that the RSA host key has just been changed. The fingerprint for the RSA key sent by the remote host is 02:74:77:8f:c2:ca:2c:8f:97:2d:98:93:70:5c:cb:d9. [...]

    The fingerprint of the new h...

  • Update on the Abel Maintenance Oct. 5, 2016 02:09 PM

    We've discovered that we have managed to write "Wednesday" or "Wednesday 6" for the end day of the maintenance stop two places (in the Abel Newsletter and in /etc/nologin on the Abel login nodes). All other places it says "Thursday" and/or "6".

    The correct end date is Thursday 6.

    We have fixed the error now, and apologise for the confusion.

    As for the maintenance itself, it progresses according to plan, and we believe we will be in production no later than 16:00 tomorrow (i.e., Thursday :).

  • Reminder: Abel and BeeGFS maintenance stop 3-6 October - save your data Sep. 19, 2016 09:28 PM


    As was mentioned in the Abel news letter in August, there will be a planned maintenance stop on 3-6 October. In this period Abel will be completely unavailable. The main reason for the maintenance stop is to do repairs on the BeeGFS file system, in particular on the disks behind the /work partition.

    Since some of the operations we need to do on the file system can potentially result in data being lost it is strongly advised to save any critical data you may have away from /work/users prior to the maintenance stop.

    Also note that the operating system on Abel will be upgraded (from CentOS 6.7 til CentOS 6.8), which means that some programs might have to be recompiled after the maintenance.

    If you have any questions, contact us at

    Updates about the maintenance...

Further assistance or advice?

Do you need help with the research computing services or advice on how best to use the resources? Send an e-mail to the Department for Reserach Computing.

RCS Course Week

Nov. 8, 2016 09:00 AM - Nov. 10, 2016 09:00 AM , Ole-Johan Dahls hus and Kristen Nygaards hus

Training in using High-performance Computing (HPC) efficiently, for Abel and Colossus (TSD) users,  The course is  open for all users of Notur systems, but examples and specifics will pertain to Abel and Colossus.

Newsletter - University of Oslo
  • re-routing... Sep. 18, 2016 07:04 PM
  • Abel Newsletter #2, 2015 May 9, 2016 07:59 AM

    CPU allocation and advanced user support deadlines, our new software request system, and our fall course week, along with the usual list of updated tools and applications now available on Abel or through the Lifeportal.