RAL Tier1 Operations Report for 20th July 2016
Review of Issues during the week 13th to 20th July 2016.
|
- There has been saturation of the inbound 10Gbit OPN link at times over the last week. The bypass route to JANET has also shown high traffic volumes.
Resolved Disk Server Issues
|
Current operational status and issues
|
- There is a problem seen by LHCb of a low but persistent rate of failure when copying the results of batch jobs to Castor. There is also a further problem that sometimes occurs when these (failed) writes are attempted to storage at other sites. A recent modification has improved, but not completed fixed this.
- The intermittent, low-level, load-related packet loss seen over external connections is still being tracked. Likewise we have been working to understand some remaining low level of packet loss seen within a part of our Tier1 network.
Ongoing Disk Server Issues
|
- gdss650 (lhcbUser, D1T0) is out of production since 20:45 on Monday 19th July
Notable Changes made since the last meeting.
|
- The migration of Atlas data from "C" to "D" tapes continues. We have migrated over 700 of the 1300 tapes so far.
Service
|
Scheduled?
|
Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
|
lcgfts3.gridpp.rl.ac.uk,
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SCHEDULED
|
WARNING
|
19/07/2016 12:00
|
19/07/2016 13:00
|
1 hour
|
Upgrade FTS to v3.4.7
|
Advanced warning for other interventions
|
The following items are being discussed and are still to be formally scheduled and announced.
|
Listing by category:
- Databases:
- Switch LFC database to use new Database Infrastructure.
- Castor:
- Update SRMs to new version, including updating to SL6. This will be done after the Castor 2.1.15 update.
- Update to Castor version 2.1.15. This awaits successful resolution and testing of the new version.
- Migration of data from T10KC to T10KD tapes (Affects Atlas & LHCb data).
- Networking:
- Replace the UKLight Router. Then upgrade the 'bypass' link to the RAL border routers to 2*40Gbit.
- Fabric
- Firmware updates on older disk servers.
Entries in GOC DB starting since the last report.
|
Open GGUS Tickets (Snapshot during morning of meeting)
|
GGUS ID |
Level |
Urgency |
State |
Creation |
Last Update |
VO |
Subject
|
122827
|
Green
|
Less Urgent
|
In Progress
|
2016-07-12
|
2016-07-13
|
SNO+
|
Disk area at RAL
|
122818
|
Green
|
Less Urgent
|
In Progress
|
2016-07-12
|
2016-07-12
|
Atlas
|
Object Store at RAL
|
122804
|
Green
|
Less Urgent
|
Waiting Reply
|
2016-07-12
|
2016-07-15
|
SNO+
|
glite-transfer failure
|
122364
|
Green
|
Less Urgent
|
Waiting Reply
|
2016-06-27
|
2016-07-15
|
|
cvmfs support at RAL-LCG2 for solidexperiment.org
|
121687
|
Yellow
|
Less Urgent
|
On Hold
|
2016-05-20
|
2016-05-23
|
|
packet loss problems seen on RAL-LCG perfsonar
|
120810
|
Green
|
Urgent
|
In Progress
|
2016-04-13
|
2016-06-24
|
Biomed
|
Decommissioning of SE srm-biomed.gridpp.rl.ac.uk - forbid write access for biomed users
|
120350
|
Green
|
Less Urgent
|
In Progress
|
2016-03-22
|
2016-05-06
|
LSST
|
Enable LSST at RAL
|
119841
|
Red
|
Less Urgent
|
On Hold
|
2016-03-01
|
2016-04-26
|
LHCb
|
HTTP support for lcgcadm04.gridpp.rl.ac.uk
|
117683
|
Yellow
|
Less Urgent
|
On Hold
|
2015-11-18
|
2016-04-05
|
|
CASTOR at RAL not publishing GLUE 2
|
Key: Atlas HC = Atlas HammerCloud (Queue ANALY_RAL_SL6, Template 729); CMS HC = CMS HammerCloud
Day |
OPS |
Alice |
Atlas |
CMS |
LHCb |
Atlas HC |
CMS HC |
Comment
|
13/07/16 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
14/07/16 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
15/07/16 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
16/07/16 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
17/07/16 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
18/07/16 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
19/07/16 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|