Tier1 Operations Report 2018-01-17

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RAL Tier1 Operations Report for 17th January 2018

Review of Issues during the week 3rd January 2018 to 10th January 2018
  • Over the weekend (13/14 Jan) LHCb were running merging jobs and this caused problems for LHCb Castor. The on-call team responded - and the problems stopped when LHCb eased back on this workload.
  • Also over the weekend there was a problem with the Atlas Castor SRMs which stopped working for some hours. The SRMs started working on their own. However, the problem has recurred and further investigations have been taking place.
  • CMS AAA redirection problems were reported at the end of last week. Investigations continue but this appears to be affecting other sites too and may not be a local RAL Tier1 problem.
Current operational status and issues
  • Ongoing security patching.
Resolved Castor Disk Server Issues
  • gdss736 (LHCbDst - D1T0) – rebuilt and back in production (RO)
  • gdss728 (CMSDisk - D1T0) – rebuilt and back in production (RW)
Ongoing Castor Disk Server Issues
  • gdss717 (CMSTape - D0T1) – multiple drive failure
Limits on concurrent batch system jobs.
  • CMS Multicore 550
Notable Changes made since the last meeting.
  • Security patching done or underway.
Entries in GOC DB starting since the last report.
  • None
Declared in the GOC DB
Service Scheduled? Outage/At Risk Start End Duration Reason
srm-alice.gridpp.rl.ac.uk, srm-atlas.gridpp.rl.ac.uk, srm-biomed.gridpp.rl.ac.uk, srm-cert.gridpp.rl.ac.uk, srm-cms-disk.gridpp.rl.ac.uk, srm-cms.gridpp.rl.ac.uk, srm-dteam.gridpp.rl.ac.uk, srm-ilc.gridpp.rl.ac.uk, srm-lhcb.gridpp.rl.ac.uk, srm-lhcb.gridpp.rl.ac.uk, srm-mice.gridpp.rl.ac.uk, srm-minos.gridpp.rl.ac.uk, srm-na62.gridpp.rl.ac.uk, srm-pheno.gridpp.rl.ac.uk, srm-preprod.gridpp.rl.ac.uk, srm-snoplus.gridpp.rl.ac.uk, srm-solid.gridpp.rl.ac.uk, srm-t2k.gridpp.rl.ac.uk, SCHEDULED OUTAGE 17/01/2018 10:00 17/01/2018 13:00 3 hours Outage of Castor Storage to apply Security patches.
lcglb01.gridpp.rl.ac.uk, lcglb02.gridpp.rl.ac.uk, lcgwms04.gridpp.rl.ac.uk, lcgwms05.gridpp.rl.ac.uk, SCHEDULED OUTAGE 12/01/2018 10:00 19/01/2018 12:00 7 days, 2 hours WMS Decommissioning RAL Tier1
Advanced warning for other interventions
The following items are being discussed and are still to be formally scheduled and announced.

Ongoing or Pending - but not yet formally announced:

Listing by category:

  • Castor:
    • Update systems to use SL7 and configured by Quattor/Aquilon. (Tape servers done)
    • Move to generic Castor headnodes.
  • Echo:
    • Update to next CEPH version ("Luminous").
  • Networking
    • Extend the number of services on the production network with IPv6 dual stack. (Done for Perfsonar, FTS3, all squids and the CVMFS Stratum-1 servers).
  • Services
    • Ending of WMS service (ongoing).
  • Internal
    • DNS servers will be rolled out within the Tier1 network.
    • Infrastructure
  • Testing of power distribution boards in the R89 machine room is being scheduled for some time late July / Early August. The effect of this on our services is being discussed.
Open GGUS Tickets (Snapshot during morning of meeting)
Ticket-ID Type VO Notified Site Resp. Unit Status Priority Creation Last Update ToI Subject
132844 TEAM atlas RAL-LCG2 NGI_UK assign to:lcg-support@gridpp.rl.ac.uk waiting for reply urgent 2018-01-14 02:10:00 2018-01-16 16:51:00 Storage Systems UK RAL-LCG2 DATADISK transfer errors "DESTINATION OVERWRITE srm-ifce err:"
132830 USER cms RAL-LCG2 NGI_UK in progress very urgent 2018-01-12 11:11:00 2018-01-16 16:36:00 CMS_AAA WAN Access Reading issues T1_UK_RAL
132802 USER cms RAL-LCG2 NGI_UK in progress urgent 2018-01-11 10:30:00 2018-01-15 11:26:00 CMS_AAA WAN Access Low HC xrootd success rates at T1_UK_RAL
132712 USER other RAL-LCG2 NGI_UK assign to:lcg-support@gridpp.rl.ac.uk share with:Kashif.Mohammad@PHYSICS.OX.AC.UK in progress less urgent 2018-01-04 16:22:00 2018-01-16 15:01:00 Other support for the hyperk VO (RAL-LCG2)
132589 TEAM lhcb RAL-LCG2 NGI_UK in progress very urgent 2017-12-21 06:45:00 2018-01-10 11:07:00 Local Batch System Killed pilots at RAL
131815 USER t2k.org RAL-LCG2 NGI_UK waiting for reply less urgent 2017-11-13 14:42:00 2018-01-17 09:24:00 Storage Systems Extremely long download times for T2K files on tape at RAL
127597 USER cms RAL-LCG2 NGI_UK assign to:lcg-support@gridpp.rl.ac.uk share with:sexton@fnal.gov on hold urgent 2017-04-07 10:34:00 2017-10-05 09:14:00 File Transfer Check networking and xrootd RAL-CERN performance
124876 USER ops RAL-LCG2 NGI_UK assign to:lcg-support@gridpp.rl.ac.uk on hold less urgent 2016-11-07 12:06:00 2017-11-13 16:55:00 Operations [Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer-ops@gridftp.echo.stfc.ac.uk
117683 USER none RAL-LCG2 NGI_UK assign to:lcg-support@gridpp.rl.ac.uk on hold less urgent 2015-11-18 11:36:00 2018-01-03 15:26:00 Information System CASTOR at RAL not publishing GLUE 2
Availability Report
Day OPS Alice Atlas CMS LHCb Atlas Echo Comment
10/01/18 100 100 100 100 100 100
11/01/18 100 100 100 100 98 100 gdss736 (LHCb) failed
12/01/18 100 100 100 100 100 100
13/01/18 100 100 100 100 100 100
14/01/18 100 96 53 100 100 100
15/01/18 100 100 74 100 100 100
16/01/18 100 100 92 100 100 100
Hammercloud Test Report

Key: Atlas HC = Atlas HammerCloud (Queue ANALY_RAL_UCORE, Template 841); CMS HC = CMS HammerCloud

Day Atlas HC CMS HC Comment
10/01/18 100 100
11/01/18 100 100
12/01/18 100 100
13/01/18 100 100
14/01/18 100 100
15/01/18 100 99
16/01/18 85 99


Notes from Meeting.
  • None yet.