Cirrus is an HPC system designed to solve computational, simulation, modelling, and data science challenges.

CIRRUS system

Cirrus is a state-of-the-art HPC system running industry-standard Linux that provides an ideal platform for users to solve their computational simulation and modelling challenges.

Users are able to run their own codes as well as accessing a range of commercial software tools. These are accessed on an on-demand, pay-per-use basis and used to solve CFD and FEA simulation and modelling problems in sectors such as:

  • Automotive
  • Aerospace
  • Energy
  • Oil and gas
  • General engineering
  • Life sciences
  • Financial services


# Nodes

280 CPU, 36+2 GPU nodes


CPU Nodes: 2xIntel Xeon “Broadwell”, 2.1 Ghz, 18-core per node

GPU Nodes: 2xIntel Xeon “Cascade Lake”, 2.4 Ghz, 20-core per node

Total CPU cores

10,080 Broadwell cores, 1520 Cascade Lake cores


4xNvidia Tesla V100-SXM2-16GB GPU, 640 Tensor core, 5,120 CUDA core per node, 152 GPUs in total

Total GPU cores

97,280 Tensor cores, 778,240 CUDA cores

System Memory details

CPU Nodes: 256GB per node, 71 TB total

GPU Nodes: 384GB per node, 14 TB total

Storage technologies and specs

406 TB DDN Lustre fast file system

256TB HPE XFS/RPOOL NVMe fast file system

Interconnect technologies and specs

CPU Nodes, login nodes and Lustre: 26 FDR Inifinband Switches at 56 Gbit/s

GPU Nodes and NVMe storage: 8 EDR Infiniband Switches at 100 Gbit/s

Layout/Physical system scale

Cirrus is composed of 4 HPE SGI 8600 cabinets as well as 4 support cabinets for system management and storage and a Cooling Distribution Unit

Cooling tech and specs

The Cirrus Compute Nodes are stored in water cooled HPE SGI 8600 cabinets

Scheduler details


System OS Details

CentOS 8 (Compute Nodes) and Red Hat Enterprise Linux (Login and management nodes)

Science and applications

Cirrus provides an ideal platform for solving computational, simulation, modelling, and data science challenges. Work on Cirrus covers a wide range of fields including physics, chemistry and engineering.


Academic access

Academic access to Cirrus is primarily available for work within the EPSRC remit and academics at Scottish Institutions. 

Details of academic access routes are available on the Cirrus website.

Commercial access

Cirrus has been designed to support a wide range of industry applications and EPCC can provide both access to HPC resources and also consultancy to effectively exploit HPC resources.

For access to Cirrus and EPCC expertise please contact

Trial access

Details of instant access are available on the Cirrus website.


The key management staff for Cirrus are:

  • Prof. Mark Parsons (Service Director)
  • Dr Alan Simpson (Deputy Service Director)
  • Ms Josephine Beech-Brandt (Service Owner)


System maintenance and provision are provided by the Service Desk, Computational Support and Engineering and HPC Systems Team within EPCC and the hardware provider HPE.

Support is available Monday to Friday from 08:00 until 18:00 UK time (excluding UK public holidays) via