WLCG DOMA BDT Meeting

Wednesday 21 Sept 2022, 16:30 → 17:30 Europe/Zurich

Brian Paul Bockelman (University of Wisconsin Madison (US)), Maria Arsuaga Rios (CERN), Petr Vokac (Czech Technical University in Prague (CZ))

Topic: WLCG DOMA BDT Meeting (twiki)

1 News

2 Packet marking

Speakers: Marian Babik (CERN), Shawn Mc Kee (University of Michigan (US))

• Flow lifecycle
  • Tickets created for the developments needed in the data management and transfer systems to propagate flow identifier to the storages
  • Rucio, FTS/GFAL2 tickets 
    • https://github.com/rucio/rucio/issues/5856
    • https://its.cern.ch/jira/browse/FTS-1829
    • https://its.cern.ch/jira/browse/DMC-1344
• Storages
  • dCache update
• Flowd 
  • Netlink support
  • Packet marking backends (eBPF-TC)
  • UDP listener plugin (fireflies forwarding)
  • Prometheus backend (exposing flows+netlink+exp/activity)
  • All changes in testing, I will merge to scitags repo once done
• Working on SC22 demo (packet marking with xrootd/flowd via eBPF and accounting using P4 switch on LHCONE)

3 Transfers with tokens

Speaker: Francesco Giacomini (INFN CNAF)

WLCG SAM/ETF storage tests with tokens

• Plan? Include WLCG JWT storage compliance tests as suggested by CMS?
• rely on higher level tools like gfal2
• to be presented next BDT meeting

4 Tape REST access

Speaker: Mihai PATRASCOIU (CERN)

FTS tests status with TAPE REST API

• No news from FTS

dCache volunteers for early adoption of TAPE REST in production?

• basically T1 site that could provide dCache 8.2 in ~ Q1 2023

5 AOB

FTS_IPv6_Monitoring.pdf

HTTP-TPC standard evolution

• Where is the official repository for this standard?
  • original document with HTTP / WebDAV Third-Party-Copy Technical Details
  • github repo with a draft of HTTP Third Party Transfer standard
• What is the way to request new feature?
  • Process to agree on mandatory / optional features?
  • Pass HTTP-TPC transfer info via TransferHeader mechanism
  • Versioning / list of supported functions?
• Create simple twiki page with basic instructions
  • include reference to the current HTTP-TPC standard "1.0"
  • list of suggestions for new extensions
    • target standard version if we agree to implement given feature, timeline(?)
    • include rejected proposals with description

Presentation on FTS & (HTTP-TPC) IPv6 Monitoring

• (slides attached)