Difference between revisions of "Tier1 Operations Report 2016-11-23"
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| style="background-color: #b7f1ce; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Review of Issues during the week 16th to 23rd November 2016. | | style="background-color: #b7f1ce; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Review of Issues during the week 16th to 23rd November 2016. | ||
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− | * There was a problem on | + | * There was a problem on the Castor 'GEN' instance following the renewal of the host certificates on the SRMs. The renewal process did not replicate the 'alternative names' section of the certificates and the DNS aliases for the GEN SRMs were not included. This caused failures when accessing the SRMs. GGUS tickets were received from both SNO+_ and MICE on Monday evening and Tuesday Morning (21/22 Nov). However, the lack of Admin On Duty yesterday meant these tickets were not acted upon until this morning (Wed 23rd) when the problem was quickly resolved. |
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Revision as of 12:04, 23 November 2016
RAL Tier1 Operations Report for 23rd November 2016
Review of Issues during the week 16th to 23rd November 2016. |
- There was a problem on the Castor 'GEN' instance following the renewal of the host certificates on the SRMs. The renewal process did not replicate the 'alternative names' section of the certificates and the DNS aliases for the GEN SRMs were not included. This caused failures when accessing the SRMs. GGUS tickets were received from both SNO+_ and MICE on Monday evening and Tuesday Morning (21/22 Nov). However, the lack of Admin On Duty yesterday meant these tickets were not acted upon until this morning (Wed 23rd) when the problem was quickly resolved.
Resolved Disk Server Issues |
- GDSS750 (LHCbDst – D1T0) ...
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 that has been seen over external connections is still being tracked. The replacement of the UKLight router appears to have reduced this - but we are allowing more time to pass before drawing any conclusions.
Ongoing Disk Server Issues |
- None
Notable Changes made since the last meeting. |
- There was a short (one to two hour) interruption to tape mounts while the system that runs the tape library control software was swapped on Tuesday morning (15th Nov).
- LHCb writing to the 'D' tapes. The migration of their data from 'C' to 'D' tapes is underway - with around 100 (some 10%) of the tapes done.
Declared in the GOC DB |
None
Advanced warning for other interventions |
The following items are being discussed and are still to be formally scheduled and announced. |
Listing by category:
- Castor:
- Merge AtlasScratchDisk and LhcbUser into larger disk pools
- Update to Castor version 2.1.15. Planning to roll out January 2017. (Proposed dates: 10th Jan: Nameserver; 17th Jan: First stager (LHCb); 24th Jan: Stager (Atlas); 26th Jan: Stager (GEN); 31st Jan: Final stager (CMS)).
- Update SRMs to new version, including updating to SL6. This will be done after the Castor 2.1.15 update.
- 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 |
---|---|---|---|---|---|---|
gridftp.echo.stfc.ac.uk, s3.echo.stfc.ac.uk, s3.echo.stfc.ac.uk, xrootd.echo.stfc.ac.uk | UNSCHEDULED | OUTAGE | 18/11/2016 14:30 | 21/11/2016 11:00 | 2 days, 20 hours and 30 minutes | Echo cluster is coming back online, following on from shutdown for backend network upgrade behind Echo Storage service |
gridftp.echo.stfc.ac.uk, s3.echo.stfc.ac.uk, s3.echo.stfc.ac.uk, xrootd.echo.stfc.ac.uk | UNSCHEDULED | OUTAGE | 16/11/2016 14:30 | 18/11/2016 14:30 | 2 day, | Follow on work dealing with bringing cluster back online after backend network upgrade behind Echo Storage service |
gridftp.echo.stfc.ac.uk, s3.echo.stfc.ac.uk, s3.echo.stfc.ac.uk, xrootd.echo.stfc.ac.uk | SCHEDULED | OUTAGE | 16/11/2016 10:30 | 16/11/2016 14:30 | 4 hours | Upgrading backend network behind Echo Storage service |
Open GGUS Tickets (Snapshot during morning of meeting) |
GGUS ID | Level | Urgency | State | Creation | Last Update | VO | Subject |
---|---|---|---|---|---|---|---|
124876 | Green | Less Urgent | On Hold | 2016-11-07 | 2016-11-15 | OPS | [Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer-ops@gridftp.echo.stfc.ac.uk |
124785 | Red | Urgent | Reopened | 2016-11-02 | 2016-11-09 | CMS | Configuration updated AAA - CMS Site Name missing |
124606 | Yellow | Very Urgent | In Progress | 2016-10-24 | 2016-11-01 | CMS | Consistency Check for T1_UK_RAL |
122827 | Green | Less Urgent | Waiting for Reply | 2016-07-12 | 2016-10-11 | SNO+ | Disk area at RAL |
120350 | Yellow | Less Urgent | In Progress | 2016-03-22 | 2016-08-09 | LSST | Enable LSST at RAL |
117683 | Red | Less Urgent | On Hold | 2015-11-18 | 2016-10-05 | CASTOR at RAL not publishing GLUE 2 (Updated. There are ongoing discussions with GLUE & WLCG) |
Availability Report |
Key: Atlas HC = Atlas HammerCloud (Queue ANALY_RAL_SL6, Template 808); CMS HC = CMS HammerCloud
Day | OPS | Alice | Atlas | CMS | LHCb | Atlas HC | CMS HC | Comment |
---|---|---|---|---|---|---|---|---|
16/11/16 | 100 | 100 | 100 | 100 | 100 | 99 | N/A | |
17/11/16 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
18/11/16 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
19/11/16 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
20/11/16 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
21/11/16 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
22/11/16 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
Notes from Meeting. |
- None yet