DECI Access: Information for Applicants

The PRACE DECI programme provides cross-national access to European Tier-1 HPC resources (national systems).

DECI Call for Proposals for HPC Compute Resources award access to successful projects for a period of 12 months.

Resources are available on various architectures and system configurations made available by various PRACE partners. Applicants need not specify a particular machine or architecture, but if they do, we will endeavour to take these preferences into account.

What is DECI

DECI is designed for projects requiring access to Tier-1 resources not currently available in the Principal Investigator’s own country or for international collaborations and for projects which do ot require resources on the very largest (Tier-0) European Supercomputers or very large allocations of CPU. DECI is also an important and integral part of PRACE and the European HPC ecosystem as it can act as a springboard for the careers of young researchers: through DECI they can access a larger pool of Tier-1 resources and increase the complexity of their research.

DECI is a resource exchange programme where resources are provided by a subset of PRACE members and awarded via the juste retour principle. This means that projects from each contributing country will in total receive at least 70% of the amount of resources contributed to DECI by the PI’s own country but will be allocated to a machine with an architecture and set up which best matches the needs of that project. The remaining time (up to 30%) is reserved for projects from countries which are not providing resources to the call. Individual projects are limited to around 5 million machine hours (average award per project expected to be around 2.5 million machine hours).

Scope of the DECI calls and criteria for access

DECI enables European researchers to obtain access to the most powerful national (Tier-1) computing resources in Europe regardless of their country of origin or employment and to enhance the impact of European science and technology at the highest level. Proposals must deal with complex, demanding, innovative simulations that would not be possible without Tier-1 access. Some support is available for setting up, porting and running codes efficiently on the resources assigned.

Eligibility for DECI

Proposals from academia and industry are eligible, as long as the project leader is undertaking non-proprietary research in a European country (European Union, candidates, associated countries and PRACE member countries). Project leaders will typically be employed in research organisations (academic or industrial). Individual HPC centres may have further restrictions on who is eligible to use the machines, e.g. due to US export rules. Further information is available on request.


For any queries related to DECI please contact: deci-support(at)