DeiC HPC Interactive HPC Supercomputing UCloud UCloud status

New milestone as DeiC Interactive HPC reaches 6,000 users

Recently, the DeiC Interactive HPC consortium (which consists of Aarhus University, Aalborg University and the University of Southern Denmark) posted a news story about the user overload on the service. This is an issue arising from the very positive fact that the popularity of the DeiC Interactive HPC service is increasing, but it also has the unfortunate effect that some users are now experiencing longer waiting time on the machines than usual.

Needless to say, however, the DeiC Interactive HPC consortium is immensely proud of the success of the service – and now it can also announce that the UCloud platform, which is used to provide the DeiC Interactive HPC service, has passed 6,000 users. So many users on a service which has only been operational for 2,5 years is a great achievement.

“Overall, we’re seeing an increase in the number of new users at nearly all the 8 universities in Denmark. One significant factor for the past few months is that the number of users from Copenhagen University, which has not been using the facility extensively so far, is now increasing at a steady pace. This is both great news, but also a warning sign for us, as KU is a big university and we will need to be prepared to accommodate even more users in the future.”

Prof. Claudio Pica, director of the SDU eScience Center and DeiC Interactive HPC Consortium representative

Another factor, which causes significant spikes in the number of new users at the start of every semester, is the number of students who log on the service because the UCloud software is used as part of their courses.

The consortium is working hard to add more hardware to the DeiC Interactive HPC service to alleviate the current periods of overload. In the meantime, you can find a number of tips for how to avoid overload issues here.

This update was originally posted by the SDU eScience Center.

DeiC Interactive HPC UCloud UCloud status

The cost of success – user overload on DeiC Interactive HPC


While there was never any doubt that DeiC Interactive HPC would be a success, the popularity of the HPC facility has taken the Interactive HPC consortium a little by surprise. The two-year old system reached no less than 5000 users back in December, and while every milestone is celebrated the rapid success also comes with a price. 

We’re seeing an average rise in users of 1000 each quarter and we’re very proud of the success. However, with an average utilisation of 135% of resources for containerised applications, we’re also experiencing issues with user overload recurring more and more frequently as more users join.

DeiC Interactive HPC Consortium representative, Professor Kristoffer Nielbo, Center for Humanities Computing, Aarhus University

Additional hardware would solve most of the issues but adding more hardware is a time-consuming process, and in the meantime the consortium behind Interactive HPC is working on other solutions to ensure the best user experience. 

We are currently working on making operational status available to users to allow them to see when user overload is causing issues and plan their work differently accordingly. The part of Interactive HPC running on SDU already has a solution underway, and the part of the system located at AAU will follow as soon as possible.

Professor Kristoffer Nielbo

However, users can also actively do things to avoid the user overload issues. The DeiC Interactive HPC consortium recommends that; Small users should make sure they only use the resources they need; medium users are asked to consider whether their work could be done on other HPC systems; and large users should apply for resources via the national calls.  

Applying for national resources may not fix the problem right now but by doing so researchers indicate that there is a need for additional hardware for Interactive HPC, and this can help speed up the expansion process.

Professor Kristoffer Nielbo

The consortium also recommends using the new DeiC Integration portal when it makes sense. The portal integrates multiple national HPC systems and allows for users to seamlessly shift to other facilities clearing up space for users whose only option is Interactive HPC.  

The consortium will continue work on solving any issues and ensure that necessary resources are available because there’s no doubt that interactive HPC is here to stay as a favourite HPC resource for researchers.

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DeiC Interactive HPC reaches 4.000 users on UCloud

We’re approaching the end of the second year with DeiC Interactive HPC – and there are now 4000 users on UCloud!

During the first year with DeiC Interactive HPC, UCloud reached more than 2000 users. We’re glad that the interest in the platform has continued to grow throughout the second year.

Go to SDU eScience for full story

UCloud status

Faster startup times for Virtual Machines

On the 1st of February, a new and improved experience for virtual machines was launched on the UCloud platform. This means that launching a virtual machine will only take a few seconds. Previously, UCloud users had to wait a few business days before a virtual machine could be created due to a manual step in the approval process.

We are also planning to expand the offer of virtual machines with more types of GPU enabled machines and different software.

This is an excerpt. Click here for the full story.