Tier1 Operations Report 2018-01-10

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RAL Tier1 Operations Report for 10th January 2018

Review of Issues during the week 3rd January 2018 to 10th January 2018
  • Network connectivity issues on Stack 9 in the UPS room overnight Thursday/Friday 21/22 December affected some internal systems (mainly monitoring). A member of staff attended overnight and a faulty transceiver was found the be the cause and replaced. External services were unaffected.
  • Operations over the Christmas and New year holiday were generally stable although not completely quiet for the oncall team. There were some Castor disk server failures and staff did attend site over the holiday to replace failed disk drives. Our monitoring flagged problems with LHCb SAM tests - although these turned out to be a caused by a problem with a LHCb certificate.
  • The number of Atlas batch jobs being run is lower than expected. The batch (Condor) scheduling will be looked at to try and understand and improve this.
Current operational status and issues
  • None
Resolved Castor Disk Server Issues
  • gdss736 (LHCb)
  • gdss756 (CMS)


Ongoing Castor Disk Server Issues
Limits on concurrent batch system jobs.
  • CMS Multicore 550
Notable Changes made since the last meeting.
  • The ATLAS quota on Echo was increased by 500TB yesterday (2nd Jan). It now stands at 4.6PBytes.
  • A round of Linux kernel patching of back-end database systems has been completed.
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
  • None
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 in March. 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_SL6, Template 845); Atlas HC Echo = Atlas Echo (Template 841);CMS HC = CMS HammerCloud

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


Notes from Meeting.
  • CMS quota on Echo will be increased from 250 to 500TB. CMS will then do more stress testing.
  • MICE have probably taken their final data. Some problems with rate of transfer of data into Castor will no longer be relevant.