Tier1 Operations Report 2018-11-20

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RAL Tier1 Operations Report for 20th November 2018

Review of Issues during the week 13th November to the 20th November 2018.
  • On Thursday 15th November, all non-LHC VOs were migrated to the new consolidated Castor tape instance.
  • CMS AAA issues are ongoing, although we may have finally turned a corner! It was found that certain CMS requests do not specify the Ceph pool to use (in this case it should be “cms”). There was no default pool set, thus the request fails. It was found that a bug meant that any subsequent requests would be sent to the (non-set) default pool causing all transfers to fail. This required a restart of the XRootD process. For the CMS AAA service we have added a default pool and monitoring of the logs, which will restart the process should it detect that transfers are using a non-set pool. SAM test results were at 96% over the weekend.
  • We have been experiencing issues with (Ceph/Echo), Cluster Vision 17 disk servers that were occasionally/randomly rebooting. This has now been resolved with a firmware patch that was rolled out last week. The hardware continues to be weighted up and we exceed 1Tb/s aggregated throughput on Friday 16th - graph below.

Echoplot.png

Current operational status and issues
  • NTR
Resolved Castor Disk Server Issues
Machine VO DiskPool dxtx Comments
- - - - -
Ongoing Castor Disk Server Issues
Machine VO DiskPool dxtx Comments
gdss788 WLCG - gridTape d0t1


Limits on concurrent batch system jobs.
  • None currently enforced.
Notable Changes made since the last meeting.
  • NA62 were successfully migrated to the new consolidated Castor tape instance.
Entries in GOC DB starting since the last report.
Service ID Scheduled? Outage/At Risk Start End Duration Reason
- - - - - - - -
Declared in the GOC DB
Service ID Scheduled? Outage/At Risk Start End Duration Reason
CASTOR 26325 Yes Outage 15/11/2018 15/11/2018 3Hrs Castor SRM endpoint migration
CASTOR 26338 Yes Outage 20/11/2018 20/11/2018 3Hrs CASTOR out as part of Oracle Patch Instalation (Neptune and Pluto environments)
  • No ongoing downtime
  • No downtime scheduled in the GOCDB for next 2 weeks
Advanced warning for other interventions
The following items are being discussed and are still to be formally scheduled and announced.

Listing by category:

  • DNS servers will be rolled out within the Tier1 network.
Open

GGUS Tickets (Snapshot taken during morning of the meeting).

Request id Affected vo Status Priority Date of creation Last update Type of problem Subject Scope
138361 t2k.org in progress less urgent 19/11/2018 19/11/2018 Other RAL-LCG2: t2k.org LFC to DFC transition EGI
138356 cms in progress urgent 19/11/2018 20/11/2018 CMS_Data Transfers Transfers failing from T1_UK_RAL_Buffer to T1_UK_RAL_Disk WLCG
138327 cms in progress urgent 16/11/2018 20/11/2018 CMS_Data Transfers RAL FTS reporting connection issue with many hosts WLCG
138033 atlas in progress urgent 01/11/2018 15/11/2018 Other singularity jobs failing at RAL EGI
137897 enmr.eu in progress less urgent 23/10/2018 20/11/2018 Accounting enmr.eu accounting at RAL EGI
137822 lhcb in progress top priority 18/10/2018 14/11/2018 File Transfer FTS server seems in bad state. WLCG
137650 cms in progress top priority 09/10/2018 19/11/2018 CMS_AAA WAN Access Low HC xrootd success rates at T1_UK_RAL WLCG
GGUS Tickets Closed Last week
Request id Affected vo Status Priority Date of creation Last update Type of problem Subject Scope
138103 cms solved urgent 05/11/2018 07/11/2018 CMS_Data Transfers Transfers failing from RALPP to RAL WLCG
138077 cms solved urgent 02/11/2018 08/11/2018 CMS_SAM tests SAM test critical T1_UK_RAL WLCG
138028 lhcb verified urgent 01/11/2018 12/11/2018 File Access File cannot be staged WLCG
137752 other solved less urgent 15/10/2018 12/11/2018 VO Specific Software Replicate OSG CVMFS repositories to EGI stratum 1s EGI
136701 lhcb verified very urgent 14/08/2018 06/11/2018 File Transfer background of transfer errors WLCG
136199 lhcb verified very urgent 18/07/2018 06/11/2018 File Transfer Lots of submitted transfers on RAL FTS WLCG

Availability Report

Target Availability for each site is 97.0% Red <90% Orange <97%
Day Atlas Atlas-Echo CMS LHCB Alice OPS Comments
2018-11-07 100 100 99 100 100 100
2018-11-08 100 100 100 100 100 100
2018-11-09 100 100 100 100 100 100
2018-11-10 100 100 100 100 100 100
2018-11-11 100 100 100 100 100 100
2018-11-12 100 100 100 100 100 100
2018-11-13 100 100 87 100 100 100
Hammercloud Test Report
Target Availability for each site is 97.0% Red <90% Orange <97%
Day Atlas HC CMS HC Comment
2018-11-06 98 100
2018-11-07 100 99
2018-11-08 100 99
2018-11-09 100 98
2018-11-10 100 96
2018-11-11 100 92
2018-11-12 100 99
2018-11-13 100 99

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

Notes from Meeting.