RAL Tier1 Operations Report for 3rd December 2014
Review of Issues during the week 26th November to 3rd December 2014.
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Resolved Disk Server Issues
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Current operational status and issues
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- The problem of locking sessions in the Castor database that affected CMS & LHCb recurred on the morning of Tuesday 2nd December. Whilst this was transitory the cause has been understood and a fix will be provided in a future version of Castor.
Ongoing Disk Server Issues
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Notable Changes made this last week.
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- LHCb Castor headnodes were updated to SL6 on Tuesday 2nd December
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.
- First quarter 2015: Circuit testing of the remaining (i.e. non-UPS) circuits in the machine room.(Provisional dates: week 12-16 January).
- Castor headnode upgrades to SL6: (Assume 4 hour outage of Castor instance in each case for stager updates).
- Tuesday 2nd Dec - LHCb; Tues 9th Dec - CMS; Wed 10th Dec - Atlas; Wednesday 7th Jan - GEN; Thursday 8th Jan - Nameserver (transparent - at risk)
Listing by category:
- Databases:
- 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.
- 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 26th November and 3rd December 2014.
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Service
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Scheduled?
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Outage/At Risk
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Start
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End
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Duration
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Reason
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srm-lhcb-tape.gridpp.rl.ac.uk, srm-lhcb.gridpp.rl.ac.uk,
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SCHEDULED
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OUTAGE
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02/12/2014 10:00
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02/12/2014 14:00
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4 hours
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OS upgrade (SL6) on headnodes for LHCb Castor instance.
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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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110497
|
Green
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Less Urgent
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In Progress
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2014-12-02
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2014-11-02
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[Rod Dashboard] Issues detected at RAL-LCG2
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OPS
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110397
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Green
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Less Urgent
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In Progress
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2014-11-26
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2014-11-27
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Unable to access LFC webdav interface via browser
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dteam
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110382
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Green
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Less Urgent
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In Progress
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2014-11-26
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2014-11-26
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RAL-LCG2: please reinstall your perfsonar hosts(s)
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N/A
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109712
|
Amber
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Urgent
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In Progress
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2014-10-29
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2014-11-27
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CMS
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Glexec exited with status 203; ...
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109694
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Green
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Urgent
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On hold
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2014-11-03
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2014-11-26
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SNO+
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gfal-copy failing for files at RAL
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108944
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Amber
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Urgent
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In Progress
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2014-10-01
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2014-11-26
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CMS
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AAA access test failing at T1_UK_RAL
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107935
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Red
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Less Urgent
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On Hold
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2014-08-27
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2014-11-03
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Atlas
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BDII vs SRM inconsistent storage capacity numbers
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106324
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Red
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Urgent
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On Hold
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2014-06-18
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2014-11-27
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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
|
26/11/14 |
100 |
100 |
100 |
100 |
100 |
99 |
n/a |
|
27/11/14 |
100 |
100 |
100 |
100 |
100 |
98 |
n/a |
|
28/11/14 |
100 |
100 |
98.1 |
100 |
100 |
100 |
n/a |
|
29/11/14 |
100 |
100 |
100 |
98.5 |
100 |
100 |
n/a |
Start of problems with CMS Castor scheduler headnode.
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30/11/14 |
100 |
100 |
100 |
73.0 |
100 |
100 |
n/a |
Problems with CMS Castor scheduler headnode.
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01/12/14 |
100 |
100 |
99.2 |
95.9 |
91.9 |
100 |
n/a |
|
02/12/14 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
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