PowerPoint Presentation

ALICE WLCG operations reportMaarten LitmaathCERNIT-SDC

ALICE T1-T2 WorkshopTsukubaMarch 5, 2014

v1.0

IT-SDC : Support for Distributed Computing1Things mostly doneSL6 migrationCVMFSFairly smooth operation well done!WLCG VOBOXSHA-2gLExec

2IT-SDC2SLC6 at CERNLower CPU-over-wallclock efficiencieshttp://alimonitor.cern.ch?1081 CERN-CREAM, CERN-L: SLC5 in CERN CCCERN-SHA2: SLC6 in CERN CCCERN-CVMFS: SLC6 in Wigner CCI/O asymmetry CERN Wigner jobsAll EOS data currently only in the CERN CCTo be continued3IT-SDC3WLCG VOBOXPlease upgrade your gLite 3.2 VOBOX (if any)https://twiki.cern.ch/twiki/bin/view/LCG/WLCGvoboxDeploymentPlus CVMFS, of courseInbound connectivity to port 1975 (gsissh) from CERN networks facilitates expert assistanceIPv4128.142/16137.138/16188.184/15 sicIPv62001:1458::/32FD01:1458::/324IT-SDC4EMI-3 and UMD-3EMI-2 and UMD-2 end of support 2014-04-30EGI will run a campaign to get affected services upgraded or switched offThe WLCG baseline is updated regularlyhttps://twiki.cern.ch/twiki/bin/view/LCG/WLCGBaselineVersionsEMI-3/UMD-3 essentially OK for any productSome caveats may apply for certain productsCheck known issues along with release notesSignificant issues usually documented on the baseline page

New product versions will continue to appear in EMI-3 + EPEL and (after Staged Rollout) in UMD-3At least for the time being also see next page

5IT-SDC5Middleware Readiness WGWLCG working group to facilitate steady deployment of new versions, while keeping the infrastructure stablehttps://twiki.cern.ch/twiki/bin/view/LCG/MiddlewareReadiness

Main concern for ALICE: new versions of XRootD?Advanced sites may show the way and get official WLCG recognition for their efforts!Could we set up a small infrastructure parallel to production where new versions can be safely verified?6IT-SDC6gLExecgLExec is a utility allowing user separation in multi-user pilot jobsLet each user task run under a corresponding accountHelps dealing with security incidents and misbehaving jobsWLCG sites must implement support for gLExecALICE jobs cannot use it yet, but adaptation is plannedThe site setup is tested through SAMStatus:https://twiki.cern.ch/twiki/bin/view/LCG/GlexecDeploymentTracking Most ALICE sites done thanks!Only sites with a CE are concerned for the time being7IT-SDC7SAM testsAs of Jan 2014 the WLCG Availability and Reliability reports are no longer based on the tests by the Ops VOThe experiment tests are used instead

Test results are in the SUM dashboardhttp://dashb-alice-sum.cern.ch/ Tests simplified as of early MarchNo more tests via WMS, only direct CREAM testsA temporary trick may be needed for the OSG sitesXRootD and VOBOX tests to be added soonTo be debugged, tuned and agreed for A/R profilesBased on corresponding MonALISA tests8IT-SDC8Sites usually OK - thanks!However VOBOX issuesCE not ready for jobs, wrong proxy being used, MyProxy running out, Admins please check site issues pagehttp://alimonitor.cern.ch/siteinfo/issues.jsp Subscribe to relevant notificationshttp://alimonitor.cern.ch/xml.jsp Files unavailable due to SE problemSee aboveAbsence of system library on WNHEP_OSlibs rpm was created to avoid that9IT-SDC9