Difference between revisions of "Tier1 Operations Report 2016-03-02"

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| style="background-color: #b7f1ce; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Review of Issues during the week 24th February to 2nd March 2016.
 
| style="background-color: #b7f1ce; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Review of Issues during the week 24th February to 2nd March 2016.
 
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* Some problems with the Atlas SRMs on Wednesday  (17th Feb) - with some SAM tests failing during the evening. Fixed by
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* Some problems with the Atlas SRMs on Tuesday (1st Mar) between 11 and 12:00. Fixed by restarting the front end processes.
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restarting the front end processes.
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* There was a problem in the "CIP" machine that inputs Castor information to the BDIIs. The standby CIP was used between Thursday (25th Feb) and Monday (29th Feb) before reverting to the normal one after its repair.
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* The traffic on the OPN link this last week was significant but not so as to cause concern.
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| style="background-color: #f8d6a9; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Resolved Disk Server Issues
 
| style="background-color: #f8d6a9; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Resolved Disk Server Issues
 
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* GDSS658 (AtlasScratchDisk - D1T0) reported problems overnight on Thursday/Friday 18/19 Feb. It was taken out of service for a short while on the Friday while it underwent checks.
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* None.
 
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| style="background-color: #b7f1ce; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Notable Changes made since the last meeting.
 
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* Completed Condor updates (to version 8.4.4) on  batches of worker nodes.
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* NIS Master node upgraded.
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* Many Linux errata updates.
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! Reason
 
! Reason
 
|-
 
|-
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| Whole Site
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|lcgfts3.gridpp.rl.ac.uk,
 
| SCHEDULED
 
| SCHEDULED
 
| WARNING
 
| WARNING
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| 01/03/2016 09:00
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| 03/03/2016 10:00
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| 01/03/2016 12:00
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| 03/03/2016 11:00
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| 3 hours
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| 1 hour
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| Warning on Site during an infrastucture upgrade.
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| Update of Production FTS3 service to version 3.4.2
 
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|-style="background:#b7f1ce"
 
|-style="background:#b7f1ce"
 
! Day !! OPS !! Alice !! Atlas !! CMS !! LHCb !! Atlas HC !! CMS HC !! Comment
 
! Day !! OPS !! Alice !! Atlas !! CMS !! LHCb !! Atlas HC !! CMS HC !! Comment
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|-
 
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| 17/02/16 || 100 || 100 || style="background-color: lightgrey;" | 90 || 100 || 100 || 94 || 100 || Failed some SRM tests (could not open connection to srm-atlas.gridpp.rl.ac.uk:8443). Fixed by restarting SRM Front end daemons.
 
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|-
 
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| 18/02/16 || 100 || 100 || style="background-color: lightgrey;" | 98 || 100 || 100 || 95 || 100 || Single SRM Test failure. (could not open connection to srm-atlas.gridpp.rl.ac.uk:8443)
 
−
|-
 
−
| 19/02/16 || 100 || 100 || 100 || 100 || 100 || 92 || 100 ||
 
−
|-
 
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| 20/02/16 || 100 || 100 || 100 || 100 || 100 || 97 || 88 ||
 
−
|-
 
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| 21/02/16 || 100 || 100 || 100 || 100 || 100 || 100 || 94 ||
 
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|-
 
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| 22/02/16 || 100 || 100 || 100 || 100 || 100 || 100 || 100 ||
 
−
|-
 
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| 23/02/16 || style="background-color: lightgrey;" | 82.3 || 100 || style="background-color: lightgrey;" | 84 || style="background-color: lightgrey;" | 87 || style="background-color: lightgrey;" | 87 || 100 || 100 || Outage of Castor for application of security update with all systems rebooted.
 
 
|-
 
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| 24/02/16 || 100 || 100 || 100 || 100 || 100 || 97 || 100 ||
 
| 24/02/16 || 100 || 100 || 100 || 100 || 100 || 97 || 100 ||
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| 29/02/16 || 100 || 100 || 100 || 100 || 100 || 97 || 100 ||
 
| 29/02/16 || 100 || 100 || 100 || 100 || 100 || 97 || 100 ||
 
|-
 
|-
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| 01/03/16 || 100 || 100 || 100 || 100 || 100 || 100 || 100 ||
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| 01/03/16 || 100 || 100 || 100 || style="background-color: lightgrey;" | 95 || 100 || 93 || 100 || Single SRM Test failure on PUT (User timeout).
 
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Latest revision as of 08:33, 2 March 2016

RAL Tier1 Operations Report for 2nd March 2016

Review of Issues during the week 24th February to 2nd March 2016.
  • Some problems with the Atlas SRMs on Tuesday (1st Mar) between 11 and 12:00. Fixed by restarting the front end processes.
  • There was a problem in the "CIP" machine that inputs Castor information to the BDIIs. The standby CIP was used between Thursday (25th Feb) and Monday (29th Feb) before reverting to the normal one after its repair.
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. A recent modification has improved, but not completed fixed this.
  • The intermittent, low-level, load-related packet loss seen over external connections is still being tracked. Likewise we have been working to understand some remaining low level of packet loss seen within a part of our Tier1 network.
Ongoing Disk Server Issues
  • None
Notable Changes made since the last meeting.
  • NIS Master node upgraded.
Declared in the GOC DB
Service Scheduled? Outage/At Risk Start End Duration Reason
lcgfts3.gridpp.rl.ac.uk, SCHEDULED WARNING 03/03/2016 10:00 03/03/2016 11:00 1 hour Update of Production FTS3 service to version 3.4.2
Advanced warning for other interventions
The following items are being discussed and are still to be formally scheduled and announced.
  • The Castor 2.1.15 update will soon be scheduled. We await successful completion of testing before scheduling.

Listing by category:

  • Databases:
    • Switch LFC/3D to new Database Infrastructure.
  • Castor:
    • Update SRMs to new version (includes updating to SL6).
    • Update to Castor version 2.1.15.
    • Migration of data from T10KC to T10KD tapes (affects Atlas & LHCb data).
  • Networking:
    • Replace the UKLight Router. Then upgrade the 'bypass' link to the RAL border routers to 2*10Gbit.
  • Fabric
    • Firmware updates on remaining EMC disk arrays (Castor, LFC)
  • Grid Services
    • A Load Balancer (HAProxy) will be used in front of the FTS service.
Entries in GOC DB starting since the last report.
Service Scheduled? Outage/At Risk Start End Duration Reason
Whole site SCHEDULED WARNING 01/03/2016 09:00 01/03/2016 12:00 3 hours Warning on Site during an infrastucture upgrade.
Open GGUS Tickets (Snapshot during morning of meeting)
GGUS ID Level Urgency State Creation Last Update VO Subject
119841 Green Less Urgent In Progress 2016-03-01 2016-03-01 LHCb HTTP support for lcgcadm04.gridpp.rl.ac.uk
119389 Green Urgent Waiting Reply 2016-02-05 2016-02-12 LHCb Data transfer problem to RAL BUFFER
118809 Amber Urgent On Hold 2016-01-05 2016-01-13 Towards a recommendation on how to configure memory limits for batch jobs
117683 Green Less Urgent In Progress 2015-11-18 2016-02-17 CASTOR at RAL not publishing GLUE 2
116864 Red Urgent In Progress 2015-10-12 2016-01-29 CMS T1_UK_RAL AAA opening and reading test failing again...
Availability Report

Key: Atlas HC = Atlas HammerCloud (Queue ANALY_RAL_SL6, Template 508); CMS HC = CMS HammerCloud

Day OPS Alice Atlas CMS LHCb Atlas HC CMS HC Comment
24/02/16 100 100 100 100 100 97 100
25/02/16 100 100 100 100 100 100 100
26/02/16 100 100 100 100 100 100 100
27/02/16 100 100 100 100 100 100 N/A
28/02/16 100 100 100 100 100 91 100
29/02/16 100 100 100 100 100 97 100
01/03/16 100 100 100 95 100 93 100 Single SRM Test failure on PUT (User timeout).
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