UK NGI Status Kashif Mohammad Based on slides

UK NGI Status Kashif Mohammad Based on slides from Alastair Dewhurst and Alessandra Forti 16/10/2021 1

UK NGI • 17 T 2 Sites and one Tier-1 at RAL • CE’s are mainly ARC-CE • Few CREAM-CE as well • Mostly DPM as storage • d. Cache, Sto. RM also in use • Tier-1 uses Castor/CEPH 16/10/2021 2

UK BDII Status • 18 Site BDII’s • 3 Top BDII’s 16/10/2021 Site Bdii Top Bdii ECDF info 4. glite. ecdf. ed. ac. uk BHAM epgr 09. ph. bham. ac. uk Liverpool hepgrid 4. ph. liv. ac. uk Manchester sitebdii. tier 2. hep. manchester. a c. uk Sheffield lcg. shef. ac. uk Durham site-bdii. dur. scotgrid. ac. uk Brunel dc 2 -grid-68. brunel. ac. uk RHUL sbdii 2. ppgrid 1. rhul. ac. uk Cambridge vserv 02. hep. phy. cam. ac. u k Bristol lcgbdii 02. phy. bris. ac. uk Sussex grid-bdii-02. hpc. susx. ac. uk Lancaster py-fjalar. hec. lancs. ac. uk QMUL bdii 02. esc. qmul. ac. uk Oxford t 2 bdii 06. physics. ox. ac. uk Imperial bdii. grid. hep. ph. ic. ac. uk (2) Glasgow svr 030. gla. scotgrid. ac. uk RALPP site-bdii. pp. rl. ac. uk RAL Tier-1 site-bdii. gridpp. rl. ac. uk (2) lcgbdii. gridpp. rl. ac. uk (2) TOTAL hosts 20 5 topbdii. tier 2. hep. manchester. a c. uk topbdii. grid. hep. ph. ic. ac. uk (2) 3

Motivation for BDII Replacement • Since December 2012 there have been discussions about replacing the BDII. • It’s too complex and doesn’t provide VOs with the information they need. • New users (e. g. DUNE, SKA) are getting their information from elsewhere • It cannot be easily extended for new services. • OSG BDII has been decommissioned since 31 / 3 / 2017. • Less efforts at site due to funding cut so it would be useful to have one less service to manage 16/10/2021 4

UK BDII Plan • UK has been involved with WLCG Information System Task Force from the very beginning • https: //twiki. cern. ch/twiki/bin/view/EGEE/WLCGISEvolution • Contributions from Alessandra Forti, Andy Mc. Nab, David Meredith (former GOCDB developer). • General consensus among UK sites are to publish static information in JSON format as described in WLCG Information task force. • Site JSON file can be updated manually or semi-automatically

Time Line • During the October WLCG Information System Evolution Task Force the json format for Computing Elements was agreed: • https: //indico. cern. ch/event/762547/ • RAL and Manchester testing new format. • Manchester is planning to publish by end of this week. • UK intend to have json at many sites by end of the year • At least 3 months running systems in parallel. • Hope to decommission BDII by mid 2019. 16/10/2021 6

Residual Issues • Some work would be needed at UK Dirac instance • Need to migrate LFC users to DIRAC File Catalogue (ongoing). • Inevitably some problems will be uncovered during the migration. • Forgotten about VO still using BDII? • How to publish several CEs if all have access to same batch resource • https: //docs. google. com/document/d/1 pg_5 Kibc_Z 4 JF 4_HJy. W 5 x. L 6 GVYKw. Xx. OU 7 DXf 2 QP 9 Ag/edit • Storage Publishing ? 16/10/2021 7

Security Implications • Main security monitoring EGI CSIRT uses relies upon Argo. • Migration to Argo ongoing. • Argo developers need to be able to understand new format. • Other things to consider: • Make sure up to date information on sites for incident response. • Need to propagate suspension information. • BDII is used to identify endpoints for security service challenges. Comments from UK NGI security officer (David Crooks) 16/10/2021 8