RAL Tier1 Operations Report for 22nd November 2017
Review of Issues during the week 16th to 22th November 2017.
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- There was a power outage affecting the RAL site (and wider area), on the 20th November at around 12:05. This lasted around 10 minutes. Services impacted were Tier1, SCARF, Jasmin, Databases etc. However, many services have stayed up (i.e. those on UPS). All services were back by 18:34.
- Production FTS was migrated to a distributed database for the back-end. (Tuesday, 21st November).
Current operational status and issues
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- FTS problems since power outage (both instances), appears to be related to IPv6 and router issues. Temporary resolution to disable IPv6 on host.
Resolved Disk Server Issues
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- GDSS776 - (LHCbDst D1T0) crashed at the end of yesterday afternoon (14th). gdss776 is ready to go back to full production mode.
Ongoing Disk Server Issues
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- GDSS698 - FSProbe Error on GDSS698 - Failed disk has been replaced and is being rebuilt.
- GDSS740 - RAID Partially Degraded. Failed disk has been replaced and is being rebuilt.
Limits on concurrent batch system jobs.
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Notable Changes made since the last meeting.
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- Re-distribution of data in Echo onto the 2015 capacity hardware is now complete. There are now 8PBytes of usable space in Echo. However, there is some data rebalancing to be done before upping the quotas so the VOs can make use of the extra space.
- Consolidation of the FTS back-end database
- Echo configuration modified to allow Atlas an additional 500TB of space on Echo bringing their current total to 3600TB.
Entries in GOC DB starting since the last report.
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Service
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Scheduled?
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Outage/At Risk
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Start
|
End
|
Duration
|
Reason
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lcgfts3.gridpp.rl.ac.uk,
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SCHEDULED
|
OUTAGE
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21/11/2017 07:00
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21/11/2017 15:00
|
8 hours
|
MySQL backend consolidation
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All CASTOR
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UNSCHEDULED
|
OUTAGE
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20/11/2017 15:00
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20/11/2017 18:01
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3 hours and 1 minutes
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RAL Tier1 Power outage update : All systems now back with the exception of CASTOR.
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All CASTOR
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UNSCHEDULED
|
OUTAGE
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20/11/2017 12:05
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20/11/2017 15:00
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2 hours and 55 minutes
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Site power cut Power restored, investigations ongoing.
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srm-lhcb.gridpp.rl.ac.uk, srm-lhcb.gridpp.rl.ac.uk,
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SCHEDULED
|
OUTAGE
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15/11/2017 10:00
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15/11/2017 10:40
|
40 minutes
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LHCb CASTOR SRM Update to 2.1.16-18
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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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Ongoing or Pending - but not yet formally announced:
Listing by category:
- Castor:
- Update systems (initially tape servers) to use SL7 and configured by Quattor/Aquilon.
- Move to generic Castor headnodes.
- Echo:
- Update to next CEPH version ("Luminous").
- Networking
- Extend the number of services on the production network with IPv6 dual stack. (Done for Perfsonar, FTS3, all squids and the CVMFS Stratum-1 servers).
- Services
- The Production and "Test" (Atlas) FTS3 services will be merged and will make use of a resilient distributed database.
- Internal
- DNS servers will be rolled out within the Tier1 network.
Open GGUS Tickets (Snapshot during morning of meeting)
|
GGUS ID |
Level |
Urgency |
State |
Creation |
Last Update |
VO |
Subject
|
131981
|
Green
|
Urgent
|
In Progress
|
2017-11-20
|
2017-11-21
|
ATLAS
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BNL-OSG2_DATADISK: ERROR MSG SOURCE [70] srm-ifce err: Communication error on send
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131975
|
Green
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Urgent
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In Progress
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2017-11-20
|
2017-11-21
|
ATLAS
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NDGF-T1: transfer issues from everywhere
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131912
|
Green
|
Less Urgent
|
In Progress
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2017-11-17
|
2017-11-20
|
None
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FTS RAL: fts log was not found on this server
|
131840
|
Green
|
Urgent
|
In Progress
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2017-11-14
|
2017-11-15
|
Other
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solidexperiment.org CASTOR tape copy fails
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131815
|
Green
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Less Urgent
|
In Progress
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2017-11-13
|
2017-11-20
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T2K.Org
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Extremely long download times for T2K files on tape at RAL
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130207
|
Red
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Urgent
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On Hold
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2017-08-24
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2017-11-13
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MICE
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Timeouts when copyiing MICE reco data to CASTOR
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127597
|
Red
|
Urgent
|
On Hold
|
2017-04-07
|
2017-10-05
|
CMS
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Check networking and xrootd RAL-CERN performance
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124876
|
Red
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Less Urgent
|
On Hold
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2016-11-07
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2017-11-13
|
Ops
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[Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer-ops@gridftp.echo.stfc.ac.uk
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117683
|
Red
|
Less Urgent
|
On Hold
|
2015-11-18
|
2017-11-06
|
|
CASTOR at RAL not publishing GLUE 2
|
Day |
OPS |
Alice |
Atlas |
CMS |
LHCb |
Atlas Echo |
Comment
|
15/11/17 |
100 |
100 |
100 |
100 |
100 |
100 |
|
16/11/17 |
100 |
100 |
100 |
100 |
100 |
100 |
|
17/11/17 |
100 |
100 |
100 |
100 |
Missing |
100 |
LHCb - No data returned by DB query
|
18/11/17 |
100 |
100 |
100 |
100 |
Missing |
100 |
LHCb - No data returned by DB query
|
19/11/17 |
100 |
100 |
100 |
100 |
Missing |
100 |
LHCb - No data returned by DB query
|
20/11/17 |
100 |
100 |
98 |
87 |
Missing |
100 |
LHCb - No data returned by DB query
|
21/11/17 |
100 |
100 |
61 |
100 |
Missing |
100 |
LHCb - No data returned by DB query
|
Key: Atlas HC = Atlas HammerCloud (Queue ANALY_RAL_SL6, Template 845); Atlas HC Echo = Atlas Echo (Template 841);CMS HC = CMS HammerCloud
Day |
Atlas HC |
Atlas HC Echo |
CMS HC |
Comment
|
15/11/17 |
100 |
99 |
100 |
|
16/11/17 |
100 |
100 |
100 |
|
17/11/17 |
100 |
97 |
99 |
|
18/11/17 |
100 |
100 |
100 |
|
19/11/17 |
99 |
100 |
100 |
|
20/11/17 |
99 |
99 |
92 |
|
21/11/17 |
95 |
100 |
99 |
|