Tier1 Operations Report 2018-04-23

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RAL Tier1 Operations Report for 23rd April 2018

Review of Issues during the week 16th April to the 23rd April 2018.
  • The upgrade (replacement) of the RAL firewall is scheduled to take place on the morning of the 25th April. Hopefully this will fix problems we have seen with data flows to/from our worker nodes.
  • A chassis needs replacing has almost all the services that DS provide to the whole STFC going through it. The chassis also has DNS (IPV4 & V6) which will potentially (read as 'will'), affect some of the transfers that Tier-1 are part of. This is to be scheduled three weeks time, however if required (i.e. the chassis state deteriorates further), then this will be done sooner as an emergency intervention.
Current operational status and issues
  • The problems with data flows through the site firewall being restricted is still present. New firewall equipment has been delivered and is now scheduled for deployment 25th April 2018.
Resolved Castor Disk Server Issues
  • gdss782 (atlasStripInput - D1T0) - Back in full production.
Ongoing Castor Disk Server Issues
  • gdss756 (genTape - D1T0) - Currently out of production awaiting investigation by the CASTOR and Fabric teams.
Limits on concurrent batch system jobs.
  • CMS Multicore 550
Notable Changes made since the last meeting.
  • None.
Entries in GOC DB starting since the last report.
  • None
Declared in the GOC DB
Downtime id Hosts Start Time End Time Severity Description
25175 All RAL 18/11/2015 28/03/2018 SCHEDULED WARNING Upgrade (Replacement) of Site Firewall. Within this time window there is expected to be a short break in connectivity while connections are moved across to the new firewall.
Advanced warning for other interventions
The following items are being discussed and are still to be formally scheduled and announced.

Listing by category:

  • Echo
    • Applying minor CEPH update to fix the "backfill" bug. Increase number of placement groups and add more capacity.
  • Castor:
    • Update systems to use SL7 and configured by Quattor/Aquilon. (Tape servers done)
    • Move to generic Castor headnodes.
  • 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).
    • Replacement (upgrade) of RAL firewall.
  • 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)
Request id Affected vo Status Priority Date of creation Last update Type of problem Subject Scope
117683 none on hold less urgent 18/11/2015 28/03/2018 Information System CASTOR at RAL not publishing GLUE 2 EGI
124876 ops on hold less urgent 07/11/2016 13/11/2017 Operations [Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer-ops@gridftp.echo.stfc.ac.uk EGI
127597 cms on hold urgent 07/04/2017 16/04/2018 File Transfer Check networking and xrootd RAL-CERN performance EGI
132589 lhcb in progress very urgent 21/12/2017 17/04/2018 Local Batch System Killed pilots at RAL WLCG
133992 atlas in progress less urgent 12/03/2018 19/04/2018 File Transfer RAL-LCG2-ECHO: No such file or directory EGI
134342 cms in progress urgent 29/03/2018 19/04/2018 CMS_Data Transfers CERN->MSS rate test WLCG
134488 snoplus.snolab.ca waiting for reply urgent 10/04/2018 19/04/2018 File Transfer FTS failures to RAL EGI
134494 atlas waiting for reply top priority 11/04/2018 18/04/2018 Storage Systems json space reporting not updated WLCG
134599 t2k.org in progress less urgent 18/04/2018 22/04/2018 File Access Unable to reach 25 files at RAL which are ONLINE AND NEARLINE EGI
134619 cms in progress urgent 19/04/2018 20/04/2018 CMS_SAM tests Problems reading data from ECHO WLCG
134627 cms in progress urgent 19/04/2018 20/04/2018 CMS_Data Transfers Transfer backlogs WLCG
GGUS Tickets Closed Last week
Request id Affected vo Status Priority Date of creation Last update Type of problem Subject Scope
134030 other closed less urgent 14/03/2018 17/04/2018 Other request to replicate larsoft.opensciencegrid.org cvmfs repository EGI
134362 cms closed urgent 01/04/2018 17/04/2018 CMS_SAM tests SAM3 CE and SRM problems at T1_UK_RAL WLCG
134468 cms solved top priority 09/04/2018 18/04/2018 CMS_AAA WAN Access Xrootd redirector not seeing some files in ECHO WLCG
134622 cms solved urgent 19/04/2018 19/04/2018 CMS_Data Transfers Update FileDownload configuration for RAL_Buffer - point to RAL's FTS server WLCG
Availability Report
Target Availability for each site is 97.0% Red <90% Orange <97%
2018-04-17 100 100 100 100 100 100
2018-04-18 100 100 100 90 100 100
2018-04-19 100 100 100 74 100 100
2018-04-20 100 100 100 100 100 100
2018-04-21 100 100 100 100 100 100
2018-04-22 100 100 100 100 100 100
2018-04-23 100 100 100 100 100 100
Hammercloud Test Report
Target Availability for each site is 97.0% Red <90% Orange <97%

Key: Atlas HC = Atlas HammerCloud (Queue RAL-LCG2_UCORE, Template 841); CMS HC = CMS HammerCloud

Day Atlas HC CMS HC Comment
2018/04/16 100 100
2018/04/17 100 99
2018/04/18 97 95
2018/04/19 82 99
2018/04/20 100 100
2018/04/21 100 99
2018/04/22 100 99
Notes from Meeting.
  • None yet


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