Difference between revisions of "Tier1 Operations Report 2016-11-09"

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| Configuration updated AAA - CMS Site Name missing
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| 2016-10-24
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Revision as of 12:56, 9 November 2016

RAL Tier1 Operations Report for 9th November 2016

Review of Issues during the week 2nd to 9th November 2016.
  • There has been some mopping up of systems for patching against CVE-2016-5195.
  • On Friday (4th November) there was a problem with the "test" FTS3 service. The disk area hosting the back end database filled up. Atlas (the only users of this) were asked to move to the "production" FTS service.
  • There was a problem with the Atlas Frontier service Tuesday/Wednesday (8/9 Nov). Resolved by reverting the version of the frontier-squid code - an update having been picked up during the latest security patching.
Resolved Disk Server Issues
  • None
Current operational status and issues
  • There is a problem seen by LHCb of a low but persistent rate of failure when copying the results of batch jobs to Castor. There is also a further problem that sometimes occurs when these (failed) writes are attempted to storage at other sites.
  • The intermittent, low-level, load-related packet loss that has been seen over external connections is still being tracked. The replacement of the UKLight router appears to have reduced this - but we are allowing more time to pass before drawing any conclusions.
Ongoing Disk Server Issues
  • None
Notable Changes made since the last meeting.
  • Further work in response to CVE-2016-5195.
  • LHCb now writing to the 'D' tapes.
Declared in the GOC DB
Service Scheduled? Outage/At Risk Start End Duration Reason
gridftp.echo.stfc.ac.uk, s3.echo.stfc.ac.uk, s3.echo.stfc.ac.uk, xrootd.echo.stfc.ac.uk SCHEDULED OUTAGE 16/11/2016 10:30 16/11/2016 14:30 4 hours Upgrading backend network behind Echo Storage service
Advanced warning for other interventions
The following items are being discussed and are still to be formally scheduled and announced.

Listing by category:

  • Castor:
    • Merge AtlasScratchDisk and LhcbUser into larger disk pools
    • Update to Castor version 2.1.15. Planning to roll out January 2017. (Proposed dates: 10th Jan: Nameserver; 17th Jan: First stager (LHCb); 24th Jan: Stager (Atlas); 26th Jan: Stager (GEN); 31st Jan: Final stager (CMS)).
    • Update SRMs to new version, including updating to SL6. This will be done after the Castor 2.1.15 update.
  • Fabric
    • Firmware updates on older disk servers.
Entries in GOC DB starting since the last report.
Service Scheduled? Outage/At Risk Start End Duration Reason
All Castor tape SCHEDULED WARNING 02/11/2016 07:00 02/11/2016 16:00 9 hours Tape Library not available during work on the mechanics. Tape access for read will stop. Writes will be buffered on disk and flushed to tape after the work has completed. (Delayed one day from previous announcement).
Open GGUS Tickets (Snapshot during morning of meeting)
GGUS ID Level Urgency State Creation Last Update VO Subject
124877 Green Less Urgent In Progress 2016-11-07 2016-11-07 OPS [Rod Dashboard] Issue detected : org.nordugrid.ARC-CE-SRM-result-ops@arc-ce04.gridpp.rl.ac.uk
124876 Green Less Urgent In Progress 2016-11-07 2016-11-08 OPS [Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer-ops@gridftp.echo.stfc.ac.uk
124785 Green Urgent Waiting for Reply 2016-11-02 2016-11-02 CMS Configuration updated AAA - CMS Site Name missing
124606 Green Very Urgent In Progress 2016-10-24 2016-11-01 CMS Consistency Check for T1_UK_RAL
124478 Green Urgent On Hold 2016-10-17 2016-11-01 Jobs submitted via RAL WMS stuck in state READY forever and ever and ever
123504 Amber Less Urgent Waiting for Reply 2016-08-19 2016-09-20 T2K proxy expiration
122827 Green Less Urgent Waiting for Reply 2016-07-12 2016-10-11 SNO+ Disk area at RAL
120350 Yellow Less Urgent On Hold 2016-03-22 2016-08-09 LSST Enable LSST at RAL
117683 Red Less Urgent On Hold 2015-11-18 2016-10-05 CASTOR at RAL not publishing GLUE 2 (Updated. There are ongoing discussions with GLUE & WLCG)
Availability Report

Key: Atlas HC = Atlas HammerCloud (Queue ANALY_RAL_SL6, Template 729); CMS HC = CMS HammerCloud

Day OPS Alice Atlas CMS LHCb Atlas HC CMS HC Comment
02/11/16 100 100 100 100 100 N/A 100
03/11/16 100 100 100 100 100 N/A N/A
04/11/16 100 100 100 100 96 N/A N/A Single SRM test failure on list (No such file or directory)
05/11/16 100 100 100 100 100 N/A N/A
06/11/16 100 100 100 100 100 N/A N/a
07/11/16 100 100 100 100 100 N/A 93
08/11/16 100 100 100 100 100 N/A 100
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