14/3: Following discussion at Jamboree Mark agreed to install XCache ib Bham. Mark asked for support and Ilija and Rod will help him to install XCache. Mark can deploy it by himself  ( install on bare metal or using singularity / docker container) or deploy kubernetes cluster with SLATE and Elena does the rest, keep it up and running, updated, monitored, set up in AGIS.   
    Sam suggested to discuss Bham XCache setup at the Storage meeting next week. Elena will send email to Mark
    21/03: Sam: Mark has a lot of experience setting up xrootd, so XCache setup should be a simple for him. He will setup XCache at Birmingham and agreed to be on-call. Mark can then advise other sites, eg. with Puppet. We won't use SLATE.
    Brian: ATLAS UK should do any needed AGIS setup.
    Sam: will need to understand how ATLAS uses XCache.
    04/04: Birmingham has XCache setup. Still need changes in AGIS, eg. to create an RSE. Alessandra will do it.
    18/04: Alessandra has been looking how to create RSE. Will need to contact DDM experts to understand what to change in AGIS. Perhaps there is already an XCache RSE defined at ECDF that could be used as a model model.
    02/05: Sam reported on the work, mainly by Mark and Alessandra. Some movement on configuring AGIS, but it broke things. Mario a bit reluctant because needs new Rucio features.
    Two modes we'd like to try: one cache and proxy on site and ATLAS knows nothing about the proxy. Other mode (beta) uses Rucio volatile storage. Some confusion as to which one we wanted to test. We (UK) would be happy with simple proxy, but ATLAS wants to test volatile storage.
    09/05: Brian debugging xcache it with xrdcp. Was confused by "no such file" message in debug log. This is normal for successful transfer.
    16/05: Brian: can xrdcp via Birmingham XCache from other sites, but problem with RAL Echo. Have a fix for RAL Echo, verified with a test gateway.
    Alessandra: RAL Echo via XCache will be needed eventually. Brian will put in a JIRA ticket.
    Alessandra: Rucio not yet ready to use XCache RSE. See https://its.cern.ch/jira/browse/ADCINFR-121 (and linked https://github.com/rucio/rucio/issues/2511)
    30/05: Brain will check after Alessandra's storage update
    06/06: Sam said that Teng will set up XCache monitoring  for Mark. Based on stuff he did at ECDF.
    Alessandra checked a few days ago. Stefan had changed the fairshare. Should be running more jobs now. These jobs use the XCache, so we can start to see how they do (especially once the XCache monitoring is available).
    13/06: Jobs are running fine, 2.5% are failing. Keep watching
    20/06: Mark reported success at last week's ADC Weekly. Very useful slides: https://indico.cern.ch/event/827071/contributions/3463355/attachments/1859714/3055943/AtlasDDMOpsMeeting_Jun2019.pdf
    Alessandra: still can't separate traffic. Manchester network is full, but probably not Birmingham. Some WNs outside UK using Manchester storage. Difficult to add monitoring to separate out Birmingham traffic without logging every connection.

27/06 John making progress for Cambridge, talking to Mark Slater.