Building on top of outcomes from the EPI and EUPilot projects, RISER will develop the first all-European RISC-V cloud server infrastructure, significantly enhancing Europe's open strategic autonomy. RISER will leverage and validate open hardware high-speed interfaces combined with a fully-featured operating system environment and runtime system, enabling the integration of low-power components, including the RISC-V processor chips from EPI and EUPilot and LPDDR4 memories, in a novel energy-efficient cloud architecture.

RISER brings together a set of 7 partners from industry and academia to jointly develop and validate open-source designs for standardized form-factor system platforms suitable for supporting cloud services. Specifically, RISER will build the following two cloud infrastructures:
(1) An accelerator platform, which includes the ARM-based RHEA processor from EPI and a PCIe acceleration board that will be developed within the project which will integrate up-to four RISC-V based EPI and EUPilot chips.
(2) A microserver platform, which interconnects up to ten microserver boards all developed by the project, each one supporting up to four RISC-V chips coupled with high-speed storage and networking. Embracing hyperconvergence, the microserver architecture will allow for distributed storage and memory to be used by any processor in the system with very low overhead.

The open-source system board designs of RISER will also be accompanied by open-source low-level firmware and systems software, and a representative Linux-based software stack to support cloud services. To evaluate and demonstrate the capabilities of the RISER platforms we will develop three use cases: (a) Acceleration of compute workloads, (b) Networked object and key-value storage, and (c) Containerized execution as part of a provider-managed IaaS environment. RISER will offer open access to the microserver platform, facilitating uptake and enhancing the commercialization path of project results.