Difference between revisions of "Tier1 Operations Report 2016-09-21"
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− | * | + | * We continue to move services (including arc-ce03) to the Hyper-V 2012 infrastructure. |
− | * | + | * Upgraded condor to 8.4.8 on some systems. |
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Revision as of 11:17, 21 September 2016
RAL Tier1 Operations Report for 21st September 2016
Review of Issues during the week 14th to 21st September 2016. |
- A brief power blip affected parts of the RAL site. The R89 machine room was OK. However, it was seen by equipment in the Atlas building. This had no affect on our services.
- On Sunday (18th Sep) there was a problem with the CVMFS squids. This problem was finally solved on Tuesday (20th) when all worker nodes were reverted to CVMFS 2.1.20
Resolved Disk Server Issues |
- GDSS779 (LHCbDst - D1T0) reported problems on 14th September. It was returned to service in read-only mode the following day, then back to full service on Monday (19th). Three disks showing media errors were replaced.
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.
- The intermittent, low-level, load-related packet loss seen over external connections is still being tracked.
Ongoing Disk Server Issues |
- None
Notable Changes made since the last meeting. |
- We continue to move services (including arc-ce03) to the Hyper-V 2012 infrastructure.
- Upgraded condor to 8.4.8 on some systems.
Declared in the GOC DB |
Service | Scheduled? | Outage/At Risk | Start | End | Duration | Reason |
---|---|---|---|---|---|---|
arc-ce04.gridpp.rl.ac.uk | SCHEDULED | OUTAGE | 23/09/2016 10:00 | 30/09/2016 18:00 | 7 days, 8 hours | ARC-CE04 being drained ahead of a reconfiguration and move to run on different infrastructure. |
Advanced warning for other interventions |
The following items are being discussed and are still to be formally scheduled and announced. |
Listing by category:
- Preventative Maintenance on the Tape Libraries. Tuesday 13th September.
Listing by category:
- 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 LHCb data from T10KC to T10KD tapes.
- 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. |
Service | Scheduled? | Outage/At Risk | Start | End | Duration | Reason |
---|---|---|---|---|---|---|
arc-ce03.gridpp.rl.ac.uk | SCHEDULED | OUTAGE | 15/09/2016 13:00 | 22/09/2016 18:00 | 7 days, 5 hours | ARC-CE03 being drained ahead of a reconfiguration and move to run on different infrastructure. |
Open GGUS Tickets (Snapshot during morning of meeting) |
GGUS ID | Level | Urgency | State | Creation | Last Update | VO | Subject |
---|---|---|---|---|---|---|---|
123504 | Green | Less Urgent | In Progress | 2016-08-19 | 2016-08-23 | T2K | proxy expiration |
122827 | Green | Less Urgent | In Progress | 2016-07-12 | 2016-08-22 | SNO+ | Disk area at RAL |
122364 | Green | Less Urgent | On Hold | 2016-06-27 | 2016-08-23 | cvmfs support at RAL-LCG2 for solidexperiment.org | |
121687 | Red | Less Urgent | On Hold | 2016-05-20 | 2016-05-23 | packet loss problems seen on RAL-LCG perfsonar | |
120350 | Yellow | Less Urgent | On Hold | 2016-03-22 | 2016-08-09 | LSST | Enable LSST at RAL |
117683 | Amber | Less Urgent | On Hold | 2015-11-18 | 2016-04-05 | CASTOR at RAL not publishing GLUE 2 |
Availability Report |
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 |
---|---|---|---|---|---|---|---|---|
14/09/16 | 100 | 99 | 100 | 100 | 100 | N/A | 100 | AliEn-SE test failures. Problem seen at other sites too. |
15/09/16 | 100 | 81 | 100 | 92 | 100 | N/A | 100 | ALICE: AliEn-SE test failures. Problem seen at other sites too; CMS: Several SRM test failures because of a user timeout error |
16/09/16 | 100 | 100 | 100 | 100 | 100 | N/A | 100 | |
17/09/16 | 100 | 100 | 100 | 100 | 100 | N/A | 100 | |
18/09/16 | 100 | 100 | 100 | 100 | 100 | N/A | 100 | |
19/09/16 | 100 | 100 | 100 | 96 | 100 | N/A | 100 | Two SRM test failures (could not open connection to srm-cms.gridpp.rl.ac.uk) plus CE test failures. |
20/09/16 | 100 | 100 | 100 | 98 | 50 | N/A | 100 | CMS: Single SRM test failure (user timeout) plus CE test failures; LHCb: We have one CE down, others working OK. But the SAM results don't seem to allow for it correctly. |