Tier1 Operations Report 2018-01-03

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RAL Tier1 Operations Report for 3rd January 2018

Review of Issues during the week 21st December 2017 to 3rd 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
  • GDSS688 (cmsDisk - D1T0) is back in production.
  • GDSS743 (atlasStripInput - D1T0) is back in production.
Ongoing Castor Disk Server Issues
  • GDSS757 (cmsDisk - D1T0) not in production.
  • GDSS756 (cmsDisk - D1T0) not in production.
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 (initially tape servers) to use SL7 and configured by Quattor/Aquilon.
    • 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
132589 TEAM lhcb RAL-LCG2 NGI_UK in progress very urgent 2017-12-21 06:45:00 2017-12-21 16:22:00 Local Batch System Killed pilots at RAL
132540 TEAM lhcb RAL-LCG2 NGI_UK assign to:lcg-support@gridpp.rl.ac.uk in progress top priority 2017-12-18 09:32:00 2017-12-23 10:13:00 Other Upload problems 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
130207 USER mice RAL-LCG2 NGI_UK assign to:lcg-support@gridpp.rl.ac.uk on hold urgent 2017-08-24 09:46:00 2017-12-18 17:22:00 Network problem Timeouts when copyiing MICE reco data to CASTOR
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 2017-11-06 16:59:00 Information System CASTOR at RAL not publishing GLUE 2
Availability Report
Day OPS Alice Atlas CMS LHCb Atlas Echo Comment
20/12/17 100 100 100 100 100 100
21/12/17 100 100 100 100 100 100
22/12/17 100 100 100 100 100 100
23/12/17 100 100 100 100 53 100 Problem with VOs monitoring.
24/12/17 100 100 100 98 100 100
25/12/17 100 100 100 100 100 100
26/12/17 100 100 100 100 100 100
27/12/17 100 100 100 100 100 100
28/12/17 100 100 100 100 100 100
29/12/17 100 100 100 100 100 100
30/12/17 100 100 100 100 100 100
31/12/17 100 100 100 100 100 100
01/01/18 100 100 100 100 100 100
02/01/18 100 100 100 100 100 100
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 Atlas HC Echo CMS HC Comment
20/12/17 100 0 100 Atlas HC Echo - No test run in time bin
21/12/17 98 0 100 Atlas HC Echo - No test run in time bin
22/12/17 100 0 98 Atlas HC Echo - No test run in time bin
23/12/17 100 0 100 Atlas HC Echo - No test run in time bin
24/12/17 0 0 100 Atlas HC Echo - No test run in time bin
25/12/17 100 0 100 Atlas HC Echo - No test run in time bin
26/12/17 100 0 100 Atlas HC Echo - No test run in time bin
27/12/17 100 0 100 Atlas HC Echo - No test run in time bin
28/12/17 100 0 100 Atlas HC Echo - No test run in time bin
29/12/17 100 0 100 Atlas HC Echo - No test run in time bin
30/12/17 93 0 100 Atlas HC Echo - No test run in time bin
31/12/17 100 0 100 Atlas HC Echo - No test run in time bin
01/01/18 100 0 100 Atlas HC Echo - No test run in time bin
02/01/18 100 0 100 Atlas HC Echo - No test run in time bin
Notes from Meeting.
  • None.