UK National Supercomputing Service

ARCHER2

The ARCHER2 service is a world class advanced computing resource for UK researchers. ARCHER2 is provided by UKRI, EPCC, HPE Cray and the University of Edinburgh.

About ARCHER2

ARCHER2 is an HPE Cray EX supercomputing system with an estimated peak performance of 28 PFLOP/s. The machine has 5,860 compute nodes, each with dual AMD EPYC 7742 64-core CPUs at 2.25GHz, giving 750,080 cores in total. Further details on the ARCHER2 hardware can be found on the ARCHER2 website.

ARCHER2 provide extensive documentation and training materials.

n02 on ARCHER2

To request an ARCHER2 account, follow these instructions. When asked to “Select correct project group” select: n02 - NCAS (National Centre for Atmospheric Science) from the drop down list.

UM data and supporting software is stored on ARCHER2 under the umshared package account: /work/y07/shared/umshared. If you have completed the setup instructions this is equivalent to the $UMDIR environment variable.

See the Unified Model pages for details of the UM infrastructure supported by CMS on ARCHER2.

Using ARCHER2

Users can use SAFE to query their disk usage and project resources.

n02 users have access to 3 file systems (see ARCHER2 storage):

Home: Limited in size. Cannot be seen by the compute nodes.
Work: Parallel file system.
NVMe: Parallel file system with good performance for heavy I/O jobs. Operates as a scratch system with a 28-day deletion policy.