SAM tests are ok, just occasional failures. Transfers seem fine.

However, real jobs are failing at a very high rate. Efficiency is extremely low. CMS L1s have asked me to organise stopping Processing-type jobs running at RAL, as these are the culprits. Failures are 60-80% and efficiencies are <1% for many jobs. These jobs mostly fail with FileOpen or File Read.

I changed the redirector fallback from the UK alias to the European alias. This seemed to reduce the number of FileOpen errors (the total number of failures remained high - FileOpen errors were replaced by FileRead errors).