******************* This email originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list https://spam.ic.ac.uk/SpamConsole/Senders.aspx to disable email stamping for this address. ******************* Hi All, Due to CentOS7 reaching end-of-life at the end of June, we are required to upgrade the operating system of the GridPP DIRAC servers. We hope to do this with minimal disruption (about 5 min downtime per server, 4 servers total), but we cannot rule out that this won't affect the processing of your jobs, so to be on the safe side, it's probably best to ensure that you have no jobs running on the day. The upgrade will happen on May 23rd starting at 11:00. We will send out a notice when we are done and services are stable again. Sorry for any inconvenience, but a brief downtime beats getting hacked. Regards, Daniela -- ----------------------------------------------------------- daniela.bauer@imperial.ac.uk HEP Group/Physics Dep Imperial College London, SW7 2BW Tel: 020-75947810 https://www.hep.ph.ic.ac.uk/~dbauer/