Tier1 Operations Report 2018-01-17

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RAL Tier1 Operations Report for 17th January 2018

Review of Issues during the week 11th January 2018 to 17th January 2018
  • Disk server gdss745 (AtlasDataDisk - D1T0) has failed with loss of all data on the server. The problem was triggered by a failed drive. However, errors seen on other disk drives while this one was rebuilding led to loss of the RAID6 array. There were around 960,000 files on the server - around half of which were unique. A post mortem investigation of this incident will be carried out.
  • There was a problem with the Castor GEN instance yesterday morning (Tuesday 9th). Staff restarted some of the Castor process and the service was restored by the end of the morning.
  • Patching ongoing for recent security issues.
Current operational status and issues
  • Ongoing security patching.
Resolved Castor Disk Server Issues
  • gdss736 (LHCb - D1T0) - Has been rebuilt and returned to production
  • gdss756 (CMS - D1T0) - Disk server crashed double disk failure port 24,port 28, port 3 and port 8
Ongoing Castor Disk Server Issues
  • None
Limits on concurrent batch system jobs.
  • CMS Multicore 550
Notable Changes made since the last meeting.
  • The termination of the WMS service had been announced - with a drain (i.e. not accepting new jobs) planned to start on 1st February. However, as the WMS is not being used by VOs at the moment and security patches need to be applied urgently the drain was brought forward and started this morning (10th Jan).
  • Other security patching done or underway.
Entries in GOC DB starting since the last report.

No downtime scheduled in the GOCDB between 2017-12-20 and 2018-01-03

Declared in the GOC DB
Service Scheduled? Outage/At Risk Start End Duration Reason
WMS Service: lcglb01, lcglb02, lcgwms04, lcgwms05 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
  • 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
132748 USER ops RAL-LCG2 NGI_UK in progress less urgent 2018-01-08 14:45:00 2018-01-09 09:58:00 Operations [Rod Dashboard] Issues detected at RAL-LCG2
132712 USER other RAL-LCG2 NGI_UK assign to:lcg-support@gridpp.rl.ac.uk in progress less urgent 2018-01-04 16:22:00 2018-01-08 13:35:00 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 2018-01-03 15:21:00 Local Batch System Killed pilots at RAL
131815 USER t2k.org RAL-LCG2 NGI_UK in progress less urgent 2017-11-13 14:42:00 2017-12-01 19:30:00 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
03/01/18 100 100 100 100 100 100
04/01/18 100 100 100 100 100 100
05/01/18 100 100 100 100 100 100
06/01/18 100 100 100 100 100 100
07/01/18 100 100 100 100 100 100
08/01/18 100 100 100 100 100 100
09/01/18 100 100 100 100 100 100
Hammercloud Test Report

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

Day Atlas HC CMS HC Comment
03/01/18 100 100
04/01/18 100 100
05/01/18 100 100
06/01/18 100 100
07/01/18 100 100
08/01/18 100 100
09/01/18 100 100


Notes from Meeting.
  • None yet.