Difference between revisions of "Tier1 Operations Report 2015-02-18"

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* Application of Oracle patches to some database nodes (ongoing).
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* Condor update to version 8.2.7 applied to CEs and other internal Condor systems.
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* We are now fully using cgroups to control job memory limits on the batch farm.  
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* Starting test deployments of condor 8.2.7 and cvmfs-client 2.1.20 on WOrker nodes.
 
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Revision as of 11:31, 18 February 2015

RAL Tier1 Operations Report for 18th February 2015

Review of Issues during the week 11th to 18th February 2015.
  • On Monday morning the Tier1 data link failed. This is the link between the Tier1 routers and the UKLight router). All data transfers stopped. The problem lasted for an hour from 09:00 to 10:00.
Resolved Disk Server Issues
  • GDSS656 (LHCbRawRdst - D1T0) failed on Thursday afternoon (12th Feb). It was returned to service on teh Saturday morning (14th). A disk drive failed while verifying the RAID array.
Current operational status and issues
  • We are running with a single router connecting the Tier1 network to the site network, rather than a resilient pair.
Ongoing Disk Server Issues
  • None
Notable Changes made this last week.
  • Condor update to version 8.2.7 applied to CEs and other internal Condor systems.
  • Starting test deployments of condor 8.2.7 and cvmfs-client 2.1.20 on WOrker nodes.
Declared in the GOC DB
Service Scheduled? Outage/At Risk Start End Duration Reason
All Castor (All SRMs) SCHEDULED WARNING 11/02/2015 08:30 11/02/2015 15:00 6 hours and 30 minutes Castor services At Risk during application of regular patches to back end database systems.
Advanced warning for other interventions
The following items are being discussed and are still to be formally scheduled and announced.
  • Investigate problems on the primary Tier1 router. Discussions with the vendor are ongoing.
  • Physical move of 2011 disk server racks to make space for new delivery.

Listing by category:

  • Databases:
    • Application of Oracle PSU patches to database systems (ongoing)
    • A new database (Oracle RAC) has been set-up to host the Atlas 3D database. This is updated from CERN via Oracle GoldenGate. This system is yet to be brought into use. (Currently Atlas 3D/Frontier still uses the OGMA datase system, although this was also changed to update from CERN using Oracle Golden Gate.)
    • Switch LFC/3D to new Database Infrastructure.
    • Update to Oracle 11.2.0.4
  • Castor:
    • Update SRMs to new version (includes updating to SL6).
    • Fix discrepancies were found in some of the Castor database tables and columns. (The issue has no operational impact.)
    • Update Castor to 2.1-14-latest.
  • Networking:
    • Resolve problems with primary Tier1 Router
    • Move switches connecting the 2011 disk servers batches onto the Tier1 mesh network.
    • Make routing changes to allow the removal of the UKLight Router.
    • Enable the RIP protocol for updating routing tables on the Tier1 routers. (Install patch to Router software).
  • Fabric
    • Physical move of 2011 disk server racks to make space for new delivery.
    • Firmware updates on remaining EMC disk arrays (Castor, FTS/LFC)
Entries in GOC DB starting since the last report.
Service Scheduled? Outage/At Risk Start End Duration Reason
All Castor instances (all SRMs) SCHEDULED WARNING 11/02/2015 08:30 11/02/2015 15:00 6 hours and 30 minutes Castor services At Risk during application of regular patches to back end database systems.
Castor Atlas & GEN instances. SCHEDULED WARNING 04/02/2015 08:30 04/02/2015 15:00 6 hours and 30 minutes Castor services At Risk during application of regular patches to back end database systems.
Open GGUS Tickets (Snapshot during morning of meeting)
GGUS ID Level Urgency State Creation Last Update VO Subject
111699 Green Less Urgent In Progress 2015-02-10 2015-02-11 Atlas gLExec hammercloud jobs keep failing at RAL-LCG2 & RALPP
111120 Green Less Urgent Waiting Reply 2015-01-12 2015-02-09 Atlas large transfer errors from RAL-LCG2 to BNL-OSG2
109694 Red Urgent On hold 2014-11-03 2015-01-20 SNO+ gfal-copy failing for files at RAL
108944 Red Urgent In Progress 2014-10-01 2015-02-10 CMS AAA access test failing at T1_UK_RAL
107935 Red Less Urgent On Hold 2014-08-27 2015-02-09 Atlas BDII vs SRM inconsistent storage capacity numbers
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
11/02/15 100 100 100 100 100 100 98
12/02/15 100 100 100 100 100 100 99
13/02/15 100 100 100 100 100 100 99
14/02/15 100 100 100 100 100 98 99
15/02/15 100 100 100 100 100 100 97
16/02/15 100 100 95.0 96.0 96.0 100 96 Break in network connectivity for data path
17/02/15 100 100 100 100 100 100 99
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