Navigation and service

How to Apply for Computing Time on Supercomputers at JSC

Applications for resources on JUWELS (Jülich Wizard for European Leadership Science) and JURECA-DC have to be filed by scientists. Eligible are those who are employed at universities or research facilities in Germany; here, the nationality of the applicant ("Principal investigator, PI") is irrelevant. Applicants from Europe but outside of Germany are advised of the possibility to apply at PRACE. Individual cases may deviate from this general rule after consultation with the NIC Scientific Council and the NIC Board of Directors.

The Principal Investigator must have a proven scientific record (preferable a PhD or comparable degree) and must be able to successfully accomplish the proposed tasks.

Computing resources are allocated on the basis of reports of independent reviewers. Apart from the scientific relevance of the project, the efficient use of the requested supercomputer by the project is an important criterion for the allocation of computing time. This is particularly relevant to the use of a large number of processors in parallel.

Computing time periods are yearly - with applications possible twice a year - and begin 1 May and 1 November respectively. The next call for proposals (period from 1 November 2022 to 31 October 2023) opens on 11 July 2022 and closes on 15 August 2022, 17.00 CEST.

Computing Time: Core-hours and EFLOP

Applicants may request computing time for several systems at the same time within a single proposal. Supercomputers operated at JSC consist of modules which differ considerably in their architectures. So far, computing time has been requested exclusively in units of core-hours. However, the effective computing power of the modules per core-hour differs substantially due to their individual architectures. Thus, computing time requirements for more than one module cannot be specified coherently by adding up core-hours over the requested modules. To take this into account, resource requirements for each resource type stated in core-hours will be converted to floating point operations in units of 1018 (EFLOP) based on the theoretical peak performance of the requested module. EFLOP reflects the amount of floating-point operations per year available to approved projects. The project’s total requirement is given by adding up the requested computing time in EFLOP for all modules. In the electronic questionnaire, computing time requirements have to be specified per resource type either, as previously, in million core-hours (Mcore-h) or in EFLOP. Both units will be converted into each other on the fly and displayed in due consideration of the requested resource types. Nonetheless, resources will be granted, allocated and accounted in core-hours only for each resource type. Further information can be taken from the fact sheets below.

Applications for GCS Large-Scale Projects and GCS/NIC Regular Projects on JUWELS and/or JURECA Booster Module

The GCS Computing Time Call is open to all applicants who are employed at universities or research facilities in Germany. Eligible applicants may apply for computing time on JUWELS and/or JURECA Booster Module. Please note: scientists from the Forschungszentrum Jülich and the RWTH Aachen University are explicitly invited to submit proposals for GCS/NIC Regular as well as GCS Large-Scale projects. However, computing time on the JURECA Booster is only available via JARA for those applicants as described below.

Large-Scale projects are projects that require a large amount of computing resources over longer periods of time. In detail, projects are classified as “Large-Scale” if they require at least 2% of the systems’ annual production in terms of estimated availability. Projects which do not fall into the category “Large-Scale” are called GCS Regular projects. 

The 2511 nodes of JUWELS (Jülich Wizard for European Leadership Science) on the Cluster Module are equipped with dual-socket Intel-Skylake Platinum 8168 CPUs. In addition, 56 Dual Intel Xeon Gold 6148 nodes are equipped with 4 additional NVIDIA Volta GPUs yielding a total performance of about 12 PF/s. Furthermore, the JUWELS Booster Module comprises 936 nodes each equipped with two AMD EPYC Rome 7402 CPUs with at least 512 GB DDR memory each and 4 NVIDIA Ampere A100 GPUs. JUWELS provides a total of 87 PFLOPS to its users. Please consult the fact sheets given below to get relevant information about the computing time application for JUWELS and the JURECA Booster Module.

Please note that this is the last time computing time resources will be offered for the JURECA Booster Module, as it will be shut down and dismantled by autumn 2022. Therefore, this resource will only be available for 6 months. The computing time will be allocated for the period from May to August. For September and October, the operation of the system cannot be guaranteed. Unused computing time cannot be transferred to other resources. Other supercomputer systems offered in this call are not affected by this regulation.

Important Notes:

  • Please use the following link to apply for resources on JUWELS and/or on the JURECA Booster Module. It is no longer necessary to file a separate application per supercomputing resource.

Applications for Computing Time via JARA

Scientists who are affiliated with the Forschungszentrum Jülich or the RWTH Aachen University are eligible to apply for resources on the JARA Partition.

For further information and in order to apply, please see here:

Applications for ESM Computing Time

Eligible to apply for ESM resources are researchers from all HGF institutions (Helmholtz Association of German Research Centres) in the research field Earth and Environment together with their national cooperation partners outside the HGF.

Applications for HAICORE

Researchers of the Helmholtz AI community are eligible to apply for HAICORE (Helmholtz AI computing resources).

Applications for Fenix resources

The Fenix research infrastructure offers scalable and interactive computing services, virtual machine services, as well as active and archival data repositories at multiple European HPC and data centers. These resources are available through different calls to European researchers.

For further information please contact the ICEI Project Management Office at

Further Application Possibilities for Computing Time

Application for Test or Preparatory Access

Contact information


Helmholtz AI at


ICEI Project Management Office at


Coordination Office for the Allocation of Computing Time
Jülich Supercomputing Centre
Forschungszentrum Jülich
52425 Jülich

Phone: 02461 61-2200
Fax: 02461 61-2430