RAL Tier1 Operations Report for 8th October 2014
Review of Issues during the week 1st to 8th October 2014.
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- As reported last week there was a problem with one of the site BDIIs that caused a problem for SAM tests against CEs through Tuesday/Wednesday last week (20/9 - 01/10).
Resolved Disk Server Issues
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- GDSS707 (AtlasDataDisk - D1T0) failed around 5am on Sunday morning (5th Oct). It was restarted and tested but no fault found. The system was returned to service this morning (8th Oct).
Current operational status and issues
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- We are investigating why the Atlas Frontier systems had problems using the new Cronos database.
Ongoing Disk Server Issues
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Notable Changes made this last week.
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- One batch of worker nodes (64 machines) have had Linux cgroups configured to enforce memory limits. (Before it was just advisory).
- Oracle patches (PSU) applied to the standby Neptune database (Castor Atlas & GEN) yesterday (Tuesday 30th Sep).
- Assorted system (Linux) updates.
- Migration of CMS data from 'B' to 'D' tapes is continuing.
- There was a successful UPS/Generator load test this morning (Wed 1st Oct).
Service
|
Scheduled?
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Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
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arc-ce02, arc-ce03, arc-ce04
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SCHEDULED
|
WARNING
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09/10/2014 10:00
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09/10/2014 11:00
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1 hour
|
Upgrade of ARC CEs to version 4.2.0
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All Castor (all SRM endpoints)
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UNSCHEDULED
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WARNING
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07/10/2014 15:00
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08/10/2014 17:00
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1 day, 2 hours
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Extending warning while databases running with degraded RAID battery
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Advanced warning for other interventions
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The following items are being discussed and are still to be formally scheduled and announced.
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- The rollout of the RIP protocol to the Tier1 routers still has to be completed.
- Access to the Cream CEs will be withdrawn apart from leaving access for ALICE. This was proposed for yesterday (Tuesday 30th September) but has been delayed.
- First quarter 2015: Circuit testing of the remaining (i.e. non-UPS) circuits in the machine room.
Listing by category:
- Databases:
- Apply latest Oracle patches (PSU) to the production database systems (Castor, LFC). (Underway).
- A new database (Oracle RAC) has been set-up to host the Atlas3D database. This is updated from CERN via Oracle GoldenGate.
- Switch LFC/3D to new Database Infrastructure.
- Castor:
- Update Castor headnodes to SL6.
- Fix discrepancies were found in some of the Castor database tables and columns. (The issue has no operational impact.)
- Networking:
- 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.
- Fabric
- Migration of data to new T10KD tapes. (Migration of CMS from 'B' to 'D' tapes underway; migration of GEN from 'A' to 'D' tapes to follow.)
- Firmware updates on remaining EMC disk arrays (Castor, FTS/LFC)
- There will be circuit testing of the remaining (i.e. non-UPS) circuits in the machine room (Expected first quarter 2015).
Entries in GOC DB starting between the 1st and 8th October 2014.
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Service
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Scheduled?
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Outage/At Risk
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Start
|
End
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Duration
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Reason
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All Castor (all SRM endpoints)
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UNSCHEDULED
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WARNING
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07/10/2014 15:00
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08/10/2014 17:00
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1 day, 2 hours
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Extending warning while databases running with degraded RAID battery
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arc-ce01.gridpp.rl.ac.uk
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SCHEDULED
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WARNING
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07/10/2014 10:00
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07/10/2014 11:00
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1 hour
|
Upgrade of ARC CE to version 4.2.0
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All Castor (all SRM endpoints)
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UNSCHEDULED
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WARNING
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06/10/2014 17:00
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07/10/2014 15:00
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22 hours
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At risk on all Castor instances due to problems with RAID cache battery on Castor DB RAID arrays
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All Castor (all SRM endpoints)
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UNSCHEDULED
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OUTAGE
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06/10/2014 16:00
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06/10/2014 16:22
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22 minutes
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Extending downtime to switch over dataguard for SRM databases
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srm-alice.gridpp.rl.ac.uk, srm-atlas.gridpp.rl.ac.uk, srm-biomed.gridpp.rl.ac.uk, srm-dteam.gridpp.rl.ac.uk, srm-hone.gridpp.rl.ac.uk, srm-ilc.gridpp.rl.ac.uk, srm-lhcb.gridpp.rl.ac.uk, srm-mice.gridpp.rl.ac.uk, srm-minos.gridpp.rl.ac.uk, srm-na62.gridpp.rl.ac.uk, srm-pheno.gridpp.rl.ac.uk, srm-snoplus.gridpp.rl.ac.uk, srm-superb.gridpp.rl.ac.uk, srm-t2k.gridpp.rl.ac.uk,
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UNSCHEDULED
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OUTAGE
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06/10/2014 14:30
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06/10/2014 16:00
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1 hour and 30 minutes
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Downtime to switch to failover databases because of hardware failure
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Whole Site
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SCHEDULED
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WARNING
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01/10/2014 10:00
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01/10/2014 12:00
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2 hours
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RAL Tier1 site in warning state due to UPS/generator test.
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Open GGUS Tickets (Snapshot during morning of meeting)
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GGUS ID |
Level |
Urgency |
State |
Creation |
Last Update |
VO |
Subject
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108944
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Green
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Urgent
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In Progress
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2014-10-01
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2014-10-01
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CMS
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AAA access test failing at T1_UK_RAL
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108845
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Green
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Urgent
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In Progress
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2014-09-27
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2014-10-07
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Atlas
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RAL-LCG2: Source connection timeout plus globus_ftp_client error
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108546
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Amber
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Less Urgent
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In Progress
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2014-09-16
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2014-09-22
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Atlas
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RAL-LCG2_HIMEM_SL6: production jobs failed
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107935
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Red
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Less Urgent
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In Progress
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2014-08-27
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2014-10-07
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Atlas
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BDII vs SRM inconsistent storage capacity numbers
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107880
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Red
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Less Urgent
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In Progress
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2014-08-26
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2014-10-08
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SNO+
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srmcp failure
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106324
|
Red
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Urgent
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In Progress
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2014-06-18
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2014-09-23
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CMS
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pilots losing network connections at T1_UK_RAL
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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
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01/10/14 |
67.6 |
100 |
100 |
95.5 |
100 |
100 |
n/a |
Multiple CE test failures. Appear to be due to problem on one of our site BDIIs. (Problem started yesterday).
|
02/10/14 |
100 |
100 |
98.1 |
100 |
100 |
97 |
100 |
Two SRM test failures. Both "could not open connection to srm-atlas.gridpp.rl.ac.uk". One approximately coincidental with Oracle PSU upgrade.
|
03/10/14 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
04/10/14 |
100 |
100 |
100 |
100 |
100 |
100 |
n/a |
|
05/10/14 |
100 |
100 |
99.3 |
100 |
100 |
100 |
n/a |
Single SRM test failure
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06/10/14 |
100 |
100 |
78.9 |
100 |
100 |
81 |
91 |
Battery failure in disk array holding Castor databases lead to poor database performance.
|
07/10/14 |
100 |
100 |
99.1 |
100 |
100 |
99 |
100 |
Single SRM test failure
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