Experiment Support CERN IT Department CH-1211 Geneva 23 Switzerland t DBES CVMFS deployment status Ian Collier – STFC Stefan Roiser – CERN

CERN IT Department CH-1211 Geneva 23 Switzerland t ES Content CVMFS recap Deployment status / experiment FAQs for deployment CVMFS next steps 11 July '12I Collier, S Roiser2

CERN IT Department CH-1211 Geneva 23 Switzerland t ES CVMFS recap 11 July '12I Collier, S Roiser3

CERN IT Department CH-1211 Geneva 23 Switzerland t ES Atlas deployment status 11 July '12I Collier, S Roiser4 78 out of 104 WLCG/OSG sites deployed CVMFS –Cern and all Tier 1 sites migrated Deployment by Tier Level Deployment by Cloud * T2D – T2 with better network connectivity

CERN IT Department CH-1211 Geneva 23 Switzerland t ES Info for sites supporting Atlas Using two repositories –/cvmfs/atlas.cern.ch – the “normal” sw repository –/cvmfs/atlas-conddb.cern.ch Recommendation to use CVMFS at all sites –Plan to have all sites migrated by Q Obstacle at remaining sites often lack of disk space on WNs –Current requirement for small local shared area to be dropped in the future 11 July '12I Collier, S Roiser5

CERN IT Department CH-1211 Geneva 23 Switzerland t ES LHCb deployment status 36 of 86 WLCG sites have deployed CVMFS –Cern and all Tier 1 sites are migrated –Good part of Tier 2 sites (LHCb has no Tier 3s) Possibility to follow deployment at /go/H8rd (updated weekly) /go/H8rd 11 July '12I Collier, S Roiser6 CVMFS deployed Other FS deployed

CERN IT Department CH-1211 Geneva 23 Switzerland t ES Info for sites supporting LHCb LHCb officially requests all sites supporting the VO to deploy CVMFS (squid + WNs) LHCb uses two worker node mount points –/cvmfs/lhcb.cern.ch – the “normal” sw repository –/cvmfs/lhcb-conddb.cern.ch – fast conditions !! New !! Deployed so far at all but one T1 sites. For T2s please install if not done yet Tier 2 sites with CVMFS will be preferred for extra workload –e.g. end of year data reprocessing or other CPU intensive computations 11 July '12I Collier, S Roiser7

CERN IT Department CH-1211 Geneva 23 Switzerland t ES CMS deployment status 5 Tier 2 sites have currently migrated CMS encourages sites to move to CVMFS –Wanted to wait for “hot” ICHEP period to be over –Now rolling out at T1s as well Now “hardening” procedures to install software releases on the master and critical service procedures CMS CVMFS info (inc. deployment) – mpOpsCVMFShttps://twiki.cern.ch/twiki/bin/view/CMSPublic/Co mpOpsCVMFS –Will be added to VO card soon 11 July '12I Collier, S Roiser8

CERN IT Department CH-1211 Geneva 23 Switzerland t ES CVMFS next steps / releases Client with shared cache is in testing –Should reduce overall cache space requirement Improved server software in development –New backend based on a union file system no separate read-write copy, possibility of distributing change set processing – Stratum 0s for other VOs in deployment now (eg at RAL) A client that can be NFS exported is being looked at (very problematic) Mac OS X Client 11 July '12I Collier, S Roiser9

CERN IT Department CH-1211 Geneva 23 Switzerland t ES CVMFS FAQs I’m site admin and would like to install CVMFS, where shall I look for info? – –CVMFS Technical Report: –Many sites & VOs have their own guides/channels Eg What are the channels I should subscribe to get more info / updates on CVMFS? I have an issue with CVMFS, who should I contact? –Start with 11 July '12I Collier, S Roiser10

CERN IT Department CH-1211 Geneva 23 Switzerland t ES Thanks for additional input Jarka Schovancova Alessandro de Salvo Christoph Wissing Oliver Gutsche Marco Cattaneo Maarten Litmaath 11 July '12I Collier, S Roiser11