Cirrus EX4000 service start
We are pleased to announce that the new Cirrus EX4000 service has now started. Jobs finishing after 0800 GMT today (Mon 8 Dec 2025) will be charged against budgets.
You should now use “login.cirrus.ac.uk” to access the system rather than “preview.cirrus.ac.uk”. The preview address will be removed at some time in the future. If you previously had a entry in your “known_hosts” file for the old Cirrus login nodes, you may need to manualy remove this before you can login. An example of the error and how you can fix it are included at the bottom of this message.