SLING National Open Access
Access to and use of supercomputing capacity in open access is governed by Rules for access to and use of supercomputing capacity in open access. They refer to clusters of those organizations or system administrators included in the SLING consortium who want to offer part of their capacities for general, open use in a uniform and organized manner to all eligible users in Slovenia.
Within the framework of SLING, on the basis of these rules, it is possible to obtain part of the supercomputing capacities of the following clusters:
Beneficiaries
Beneficiaries for capacity allocation can be individual applicants or groups. When the capacity is assigned to a group, the applicant must specify in the application the person who conducts the research and is responsible for the list of participants in the research who use the allocated capacities. The type and size of capacity allocated depends on the application and the importance of the project, so that all eligible users or groups can submit a proposal for any of the types of access foreseen.
Types of access and calls for tenders
At the time of application, the applicant must select one of the envisaged types of access listed below, which is most appropriate for the purpose of the application. Accesses vary in terms of purpose, the amount of resources allocated and the time limit for the allocation of resources.
Test access (TD)
Test Access is designed for new users of the SLING infrastructure to learn how to use the available systems and to test the software and algorithms before preparing a major project proposal. It is also suitable for existing users who need an allocation to test new software or applications and want to prepare appropriate benchmarking, performance and scalability analyses.
Permanent Calls
Call for allocation of SLING resources for test access (permanently open).
Results will be announced within 1 week of receipt of the application.
| System | Resources per access (node hours) | Resources for individual access (core hours) |
|---|---|---|
| Vega – CPU | 5.000 | 640.000 |
| Vega – GPU | 400 | / |
| Arnes – CPU | 5.000 | 320.000 |
| Arnes – GPU | 400 | / |
| Leonardo – DCGP (CPU)* | 400 | |
| Leonardo – Booster (GPU)* | 800 |
*To access the Leonardo HPC, you must fill in the form in English.
Development Access (DA)
Development access is mainly for software and algorithm development.
Permanent Calls
Call for allocation of SLING resources for development access (permanently open).
Results will be announced within 1 week of receipt of the application.
| System | Resources per access (node hours) | Resources for individual access (core hours) |
|---|---|---|
| Vega – CPU | 10.000 | 1.280.000 |
| Vega – GPU | 1.000 | / |
| Arnes – CPU | 5.000 | 320.000 |
| Arnes – GPU | 1.000 | / |
| Leonardo – DCGP (CPU)* | 1.000 | |
| Leonardo – Booster (GPU)* | 2.000 |
*To access the Leonardo HPC, you must fill in the form in English.
Regular Research Access (RRA)
Traditional research access is meant as production use of supercomputing capacity or data warehouse allocations where the requirements are not very high.
Open calls
Call for allocation of SLING resources for normal research access.
Deadlines for applications: 1. 3. 2026, 1. 7. 2026, 1. 11. 2026
The results will be announced within 1 month after each submission deadline.
| System | Resources per access (node hours) maximum | Resources per access (core hours) maximum |
|---|---|---|
| Vega – CPU | 200.000* | 25.600.000 |
| Vega – GPU | 25.000** | / |
| Arnes – CPU | 50.000 | 3.200.000 |
| Arnes – GPU | 10.000 | / |
| Leonardo – DCGP (CPU)*** | 12.000 | |
| Leonardo – Booster (GPU)*** | 28.000 (14.000 minimum per access) |
*The commercial value of resources in this scope is approximately €200,000. EuroHPC Vega price list.
**The commercial value of resources in this scope is approximately €125,000. EuroHPC Vega price list.
***To access the Leonardo HPC, you need to fill in the form in English.
| System | Total resources for all accesses (node hours) | Total resources for all accesses (core hours) |
|---|---|---|
| Vega – CPU | 800.000 | 102.400.000 |
| Vega – GPU | 50.000 | / |
| Arnes – CPU | 200.000 | 12.800.000 |
| Arnes – GPU | 40.000 | / |
| Leonardo – DCGP (CPU)*** | 12.000 | |
| Leonardo – Booster (GPU)*** | 28.000 (14.000 minimum per access) |
Major Research Access (VRD)
It is intended as a production application, but also for developing software systems and algorithms, adapting existing software or testing the methodology of specific scientific prototypes, where the process or the amount of data requires the use of large amounts of computing resources or data warehouses.
Open calls
Call for the allocation of SLING resources for large research access
Deadlines for applications: 1. 3. 2026, 1. 7. 2026, 1. 11. 2026
The results will be announced within 2 months after each submission deadline.
Large research accesses are those that require 200,000 CPUs or more. 40,000 GPU node hours or more.
| Systems | Resources per access (node hours) minimum | Resources for individual access (core hours) minimum |
|---|---|---|
| Vega – CPU | 200.000* | 25.600.000* |
| Vega – GPU | 25.000** | / |
| Leonardo – DCGP (CPU)*** | max 30.000 | |
| Leonardo – Booster (GPU)*** | max. 75.000 |
*The commercial value of resources in this scope is approximately €200,000. EuroHPC Vega price list.
**The commercial value of resources in this scope is approximately €125,000. EuroHPC Vega price list.
***To access the Leonardo HPC, you need to fill in the form in English. The resources will be made available to the extent that they are not used under the other calls mentioned above.
| Systems | Total resources for all accesses (node hours) | Total resources for all accesses (core hours) |
|---|---|---|
| Vega – CPU | 1.000.000 | 128.000.000 |
| Vega – GPU | 80.000 | / |
Other types of access within the national infrastructure
- Access for educational purposes (Access to supercomputing resources for educational purposes enables support for educational programmes at educational institutions in Slovenia and for workshops requiring supercomputing resources. This type of access is primarily provided by the ARNES cluster, and exceptionally also by the VEGA cluster for HPC workshops.)
- Strategic Access
- Pilot access for business (For testing purposes, business employees and entrepreneurs can apply for pilot access to get resources on the Vega supercomputer. This type of access is exclusively for companies for pilot testing, with computing capacities of up to 2000 CPU or 400 GPU node hours.)
