The GW4 Isambard Multi-Architecture Comparison System will be unavailable for the week of the 19th April to perform planned upgrades & maintenance of the software stack. This is a major software upgrade to Red Hat Enterprise Linux 8, bringing the Operating System major version inline with the A64FX service, it will provide a better base for software development and improve the MACS compatibility with scientific software, including the Cray software stack. Some user software compatibility issues are to be expected due to changed/updated libraries, so recompilations may be required to continue running on MACS. XCI & A64FX remain available during this time.

Cray CCE 9.0.0 has been installed on XCI, feel free to test it out by loading the cdt/19.06 module! This is a major revision to CCE with the compilers being based on LLVM. Documentation can be found here: https://pubs.cray.com/content/S-5212/9.0/cray-compiling-environment-cce-release-overview/cce-900-release-overview-introduction