Difference between revisions of "Tier1 Operations Report 2017-04-26"
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<!-- **********************End Availability Report************************** -----> | <!-- **********************End Availability Report************************** -----> |
Revision as of 18:44, 25 April 2017
RAL Tier1 Operations Report for 26th April2017
Review of Issues during the week 19th to 26th April 2017. |
- Problems with the LHCb Castor instance continued until Wednesday 12th April when the SRM upgrade was reverted for LHCb. Since then LHCb Castor has performed much better and the backlog of work has largely been eliminated.
- On Wednesday, 12th April a problem with certificate ownership on eight Atlas disk servers was identified. This was causing some SAM test failures. The incorrect certificate ownership was present on these servers for around 24 hours before the problem was identified and fixed.
Resolved Disk Server Issues |
- GDSS722 (AtlasDataDisk - D1T0) was taken out of service on Tuesday 18th April for memory errors to be investigated. Following a swap round and re-seating of its memory it was returned to service the following day (Wednesday 19th April).
- GDSS737 (LHCbDst - D1T0) was taken out of service on Monday, 24th April after two disk drives had failed. It returned to service, intially read-only, yesterday (25th April).
Current operational status and issues |
- We are still seeing a rate of failures of the CMS SAM tests against the SRM. These are affecting our (CMS) availabilities but the level of failures is reduced as compared to a few weeks ago.
Ongoing Disk Server Issues |
- GDSS729 (CMSDisk - D1tT0) was taken out of service yesterday (18th April) after it became unresponsive. Investigations are ongoing.
Limits on concurrent batch system jobs. |
- Atlas Pilot (Analysis) 1500
- CMS Multicore 550
Notable Changes made since the last meeting. |
- LHCb Castor SRM downgraded to version 2.11.
- Site Argus sytems put behind load balancer.
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. |
Pending - but not yet formally announced:
- Update Castor SRMs - CMS & GEN still to do. Problems seen with the SRM update mean these will probably wait until Castor 2.1.16 is rolled out.
- Chiller replacement - work ongoing. (First chiller replacement completed, second in place).
- Merge AtlasScratchDisk into larger Atlas disk pool.
Listing by category:
- Castor:
- Update SRMs to new version, including updating to SL6.
- Update to version 2.1.16
- Networking
- Enable first services on production network with IPv6 now that the addressing scheme has been agreed.
- Infrastructure:
- Two of the chillers supplying the air-conditioning for the R89 machine room are being replaced.
Entries in GOC DB starting since the last report. |
Service | Scheduled? | Outage/At Risk | Start | End | Duration | Reason |
---|---|---|---|---|---|---|
srm-lhcb.gridpp.rl.ac.uk | UNSCHEDULED | OUTAGE | 12/04/2017 13:45 | 12/04/2017 15:49 | 2 hours and 4 minutes | LHCb SRMs being downgraded in response to recent problems |
lcgwms04.gridpp.rl.ac.uk | SCHEDULED | OUTAGE | 12/04/2017 09:05 | 12/04/2017 10:57 | 1 hour and 52 minutes | server migration |
Open GGUS Tickets (Snapshot during morning of meeting) |
GGUS ID | Level | Urgency | State | Creation | Last Update | VO | Subject |
---|---|---|---|---|---|---|---|
127720 | Green | Urgent | In Progress | 2017-04-13 | 2017-04-13 | Atlas | RAL-LCG2 frontier squid has been down in the last few days |
127617 | Green | Alarm | In Progress | 2017-04-09 | 2017-04-10 | LHCb | RAL srm-s are down for LHCb |
127612 | Green | Alarm | In Progress | 2017-04-08 | 2017-04-10 | LHCb | CEs at RAL not responding |
127611 | Green | Top Priority | In Progress | 2017-04-08 | 2017-04-13 | Alice | ALICE VOBOX network problem |
127598 | Green | Urgent | In Progress | 2017-04-07 | 2017-04-07 | CMS | UK XRootD Redirector |
127597 | Green | Urgent | In Progress | 2017-04-07 | 2017-04-10 | CMS | Check networking and xrootd RAL-CERN performance |
127240 | Green | Urgent | In Progress | 2017-03-21 | 2017-04-05 | CMS | Staging Test at UK_RAL for Run2 |
126905 | Green | Less Urgent | In progress | 2017-03-02 | 2017-04-18 | solid | finish commissioning cvmfs server for solidexperiment.org |
126184 | Amber | Less Urgent | In Progress | 2017-01-26 | 2017-02-07 | Atlas | Request of inputs for new sites monitoring |
124876 | Red | Less Urgent | On Hold | 2016-11-07 | 2017-01-01 | OPS | [Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer-ops@gridftp.echo.stfc.ac.uk |
117683 | Red | Less Urgent | On Hold | 2015-11-18 | 2017-03-02 | CASTOR at RAL not publishing GLUE 2. |
Availability Report |
Key: Atlas HC = Atlas HammerCloud (Queue ANALY_RAL_SL6, Template 845); Atlas HC ECHO = Atlas ECHO (Template 841);CMS HC = CMS HammerCloud
Day | OPS | Alice | Atlas | CMS | LHCb | Atlas HC | Atlas HC ECHO | CMS HC | Comment |
---|---|---|---|---|---|---|---|---|---|
12/04/17 | 100 | 100 | 71 | 98 | 54 | 100 | 100 | 97 | Atlas: Problem with certificate ownership on some disk servers; CMS - SRM test failure: Unable to issue PrepareToPut request to Castor; LHCb - Castor/SRM problem - including short (less than hour) outage to downgrade SRM. |
13/04/17 | 100 | 100 | 92 | 98 | 100 | 99 | 100 | N/A | Atlas - Tail end of credentials problem. |
14/04/17 | 100 | 100 | 98 | 99 | 83 | 100 | 100 | N/A | Atlas - Single SRM test failure; LHCb - high load caused some test failures. |
15/04/17 | 100 | 100 | 98 | 100 | 100 | 99 | 100 | N/A | Some data missing from SAM results |
16/04/17 | 100 | 100 | 100 | 98 | 100 | 100 | 100 | N/A | Some data missing from SAM results |
17/04/17 | 100 | 100 | 100 | 99 | 100 | 87 | 100 | 100 | Some data missing from SAM results |
18/04/17 | 100 | 100 | 99 | 92 | 100 | 100 | 100 | N/A | Some data missing from SAM results |
19/04/17 | 100 | 100 | 98 | 93 | 100 | 100 | 100 | 100 | |
20/04/17 | 100 | 100 | 94 | 98 | 84 | 100 | 100 | 100 | |
21/04/17 | 100 | 100 | 87 | 100 | 92 | 100 | 100 | 100 | Atlas & LHCb: SRM Test failures |
22/04/17 | 100 | 100 | 84 | 96 | 100 | 100 | 100 | 100 | Atlas & CMS: SRM errors |
23/04/17 | 100 | 98 | 90 | 97 | 100 | 100 | 100 | 100 | Alice: Missing data; Atlas - pool full; CMS - SRM errors |
24/04/17 | 100 | 100 | 100 | 95 | 79 | 100 | 100 | 100 | SRM test failures for both VOs. |
25/04/17 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | SRM test failures for both VOs. |
Notes from Meeting. |