RAL Tier1 Operations Report for 15th April 2015
Review of Issues during the week 8th to 15th April 2015.
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- On Wednesday 18th April a minor network change triggered a wider problem across the Tier1 network and caused significant disruption of services. The planned Castor upgrade for that day had to be abandoned. A post mortem is being generated for this incident.
Resolved Disk Server Issues
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Current operational status and issues
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- We are running with a single router connecting the Tier1 network to the site network, rather than a resilient pair.
Ongoing Disk Server Issues
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Notable Changes made this last week.
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- gfal2 and davix rpms are in the process of being updated across the worker nodes.
Service
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Scheduled?
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Outage/At Risk
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Start
|
End
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Duration
|
Reason
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cream-ce01.gridpp.rl.ac.uk, cream-ce02.gridpp.rl.ac.uk
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SCHEDULED
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OUTAGE
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05/05/2015 12:00
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02/06/2015 12:00
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28 days,
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Decommissioning of CREAM CEs (cream-ce01.gridpp.rl.ac.uk, cream-ce02.gridpp.rl.ac.uk).
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All Castor (All SRMs)
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SCHEDULED
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OUTAGE
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15/04/2015 09:30
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15/04/2015 15:30
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6 hours
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Castor upgrade to 2.1.14-15 as this was postponed last week.
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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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- Turn off CREAM CEs (planned for 5th May).
- Turn off ARC-CE05. This will leave four ARC CEs (as planned.) This fifth was set-up to temporarily workround a specific problem and is no longer required.
Listing by category:
- Databases:
- Switch LFC/3D to new Database Infrastructure.
- Update to Oracle 11.2.0.4. This will affect all services that use Oracle databases (Castor, LFC and Atlas Frontier)
- Castor:
- Update SRMs to new version (includes updating to SL6).
- Fix discrepancies found in some of the Castor database tables and columns. (The issue has no operational impact.)
- Networking:
- Separate some non-Tier1 services off our network so as to be able to more easily investigate the router problems.
- Resolve problems with primary Tier1 Router
- Enable the RIP protocol for updating routing tables on the Tier1 routers. (Install patch to Router software).
- Increase bandwidth of the link from the Tier1 into the RAL internal site network to 40Gbit.
- Make routing changes to allow the removal of the UKLight Router.
- Fabric
- Firmware updates on remaining EMC disk arrays (Castor, FTS/LFC)
Entries in GOC DB starting since the last report.
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Service
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Scheduled?
|
Outage/At Risk
|
Start
|
End
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Duration
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Reason
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All Castor (All SRMs)
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SCHEDULED
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OUTAGE
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15/04/2015 09:30
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15/04/2015 15:30
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6 hours
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Castor upgrade to 2.1.14-15 as this was postponed last week.
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Whole Site
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UNSCHEDULED
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WARNING
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08/04/2015 18:57
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09/04/2015 11:00
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16 hours and 3 minutes
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Network problems continue at RAL
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Whole Site
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UNSCHEDULED
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OUTAGE
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08/04/2015 18:07
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08/04/2015 19:06
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59 minutes
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Network problems continue at RAL
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Whole Site
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UNSCHEDULED
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OUTAGE
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08/04/2015 10:31
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08/04/2015 18:03
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7 hours and 32 minutes
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Networking problem at RAL, we are investigating
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All Castor (All SRMs)
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SCHEDULED
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OUTAGE
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08/04/2015 10:00
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08/04/2015 14:00
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4 hours
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Upgrade of Castor storage to version 2.1.14-15
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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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112866
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Green
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Less Urgent
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In Progress
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2015-04-02
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2015-04-07
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CMS
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Many jobs are failed/aborted at T1_UK_RAL
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112819
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Green
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Less Urgent
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In Progress
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2015-04-02
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2015-04-07
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SNO+
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ArcSync hanging
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112721
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Green
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Less Urgent
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waiting for reply
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2015-03-28
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2015-04-06
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Atlas
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RAL-LCG2: SOURCE Failed to get source file size
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112713
|
Green
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Urgent
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In Progress
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2015-03-27
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2015-03-31
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CMS
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Please clean up unmerged area - RAL
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111699
|
Yellow
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Less Urgent
|
In Progress
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2015-02-10
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2015-03-23
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Atlas
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gLExec hammercloud jobs keep failing at RAL-LCG2 & RALPP
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109694
|
Red
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Urgent
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In Progress
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2014-11-03
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2015-03-31
|
SNO+
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gfal-copy failing for files at RAL
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108944
|
Red
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Less Urgent
|
In Progress
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2014-10-01
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2015-03-30
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CMS
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AAA access test failing 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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08/04/15 |
70.5 |
100 |
65.0 |
65.0 |
62.0 |
76 |
77 |
Networking problems before, and at start of, Castor upgrade (which was pulled).
|
09/04/15 |
100 |
100 |
100 |
100 |
100 |
100 |
97 |
|
10/04/15 |
100 |
100 |
100 |
100 |
100 |
100 |
84 |
|
11/04/15 |
100 |
100 |
100 |
100 |
100 |
100 |
95 |
|
12/04/15 |
100 |
100 |
100 |
100 |
100 |
100 |
97 |
|
13/04/15 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
14/04/15 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|