RAL Tier1 Operations Report for 4th January 2017
| Review of Issues during the fortnight 21st December 2016 to 4th January 2017.
|
Overall it was a fairly quiet holiday time operationally:
- There was a failure of a Power Distribution Unit in a rack in the UPS room in the early hours of Friday 23rd December. Staff attended on site to get the power back. This mainly affected internal services (monitoring etc) - but also the Top BDIIs. This was the second time this PDU had given problems and it was swapped out during Friday morning.
- We have had load issues on the CMS Castor instance throughout the holiday period which has led to repeated SAM test failures.
| Resolved Disk Server Issues
|
- GDSS671 (AliceDisk - D1T0) failed on Saturday (17th Dec) with a read-only filesystem. Three drives were replaced and the server was returned to service on the 22nd Dec.
| 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.
| Ongoing Disk Server Issues
|
- GDSS665 (lhcbRawRdst - D0T1) failed on Saturday 31st Dec). Investigations are ongoing.
| Notable Changes made since the last meeting.
|
| Service
|
Scheduled?
|
Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
|
| Castor CMS instance
|
SCHEDULED
|
OUTAGE
|
31/01/2017 10:00
|
31/01/2017 16:00
|
6 hours
|
Castor 2.1.15 Upgrade. Only affecting CMS instance. (CMS stager component being upgraded).
|
| Castor GEN instance
|
SCHEDULED
|
OUTAGE
|
26/01/2017 10:00
|
26/01/2017 16:00
|
6 hours
|
Castor 2.1.15 Upgrade. Only affecting GEN instance. (GEN stager component being upgraded).
|
| Castor Atlas instance
|
SCHEDULED
|
OUTAGE
|
24/01/2017 10:00
|
24/01/2017 16:00
|
6 hours
|
Castor 2.1.15 Upgrade. Only affecting Atlas instance. (Atlas stager component being upgraded).
|
| Castor LHCb instance
|
SCHEDULED
|
OUTAGE
|
17/01/2017 10:00
|
17/01/2017 16:00
|
6 hours
|
Castor 2.1.15 Upgrade. Only affecting LHCb instance. (LHCb stager component being upgraded).
|
| All Castor (all SRM endpoints)
|
SCHEDULED
|
OUTAGE
|
10/01/2017 10:00
|
10/01/2017 16:00
|
6 hours
|
Castor 2.1.15 Upgrade. Upgrade of Nameserver component. All instances affected.
|
| gridftp.echo.stfc.ac.uk, s3.echo.stfc.ac.uk, s3.echo.stfc.ac.uk, xrootd.echo.stfc.ac.uk,
|
SCHEDULED
|
OUTAGE
|
05/01/2017 10:00
|
06/01/2017 15:00
|
1 day, 5 hours
|
ECHO Re-install
|
| All Castor
|
SCHEDULED
|
OUTAGE
|
05/01/2017 09:30
|
05/01/2017 17:00
|
7 hours and 30 minutes
|
Outage of Castor Storage System for patching
|
| 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:
- Merge AtlasScratchDisk into larger Atlas disk pool.
Listing by category:
- Castor:
- Update to Castor version 2.1.15. Dates announced via GOC DB for early 2017.
- 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
|
| lcgbdii.gridpp.rl.ac.uk
|
UNSCHEDULED
|
OUTAGE
|
23/12/2016 01:30
|
23/12/2016 03:30
|
2 hours
|
Networking problems affecting part of the Tier-1 service.
|
| Open GGUS Tickets (Snapshot during morning of meeting)
|
| GGUS ID |
Level |
Urgency |
State |
Creation |
Last Update |
VO |
Subject
|
| 125480
|
Green
|
Less Urgent
|
On Hold
|
2016-12-09
|
2016-12-21
|
|
total Physical and Logical CPUs values
|
| 125157
|
Green
|
Less Urgent
|
In Progress
|
2016-11-24
|
2017-01-03
|
|
Creation of a repository within the EGI CVMFS infrastructure
|
| 124876
|
Yellow
|
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
|
2016-12-07
|
|
CASTOR at RAL not publishing GLUE 2. We looked at this as planned in December (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
|
| 21/12/16 |
100 |
100 |
100 |
96 |
100 |
N/A |
100 |
SRM test failures - User timeout
|
| 22/12/16 |
100 |
100 |
100 |
100 |
100 |
N/A |
100 |
|
| 23/12/16 |
100 |
100 |
100 |
88 |
100 |
N/A |
N/A |
SRM test failures - User timeout
|
| 24/12/16 |
100 |
100 |
100 |
96 |
100 |
N/A |
100 |
SRM test failures - User timeout
|
| 25/12/16 |
100 |
100 |
100 |
97 |
100 |
N/A |
100 |
SRM test failures - User timeout
|
| 26/12/16 |
100 |
100 |
100 |
97 |
100 |
N/A |
100 |
SRM test failures - User timeout
|
| 27/12/16 |
100 |
100 |
100 |
96 |
100 |
N/A |
N/A |
SRM test failures - User timeout
|
| 28/12/16 |
100 |
100 |
100 |
79 |
100 |
N/A |
100 |
SRM test failures - User timeout
|
| 29/12/16 |
100 |
100 |
97 |
62 |
100 |
N/A |
100 |
CMS: Block of SRM test failures - User timeout; Atlas: single SRM test failure ( could not open connection to srm-atlas.gridpp.rl.ac.uk).
|
| 30/12/16 |
100 |
100 |
100 |
95 |
100 |
N/A |
100 |
SRM test failures - User timeout
|
| 31/12/16 |
100 |
100 |
100 |
97 |
100 |
N/A |
100 |
SRM test failures - User timeout
|
| 01/01/17 |
100 |
100 |
100 |
99 |
100 |
N/A |
100 |
SRM test failures - User timeout
|
| 02/01/17 |
100 |
100 |
100 |
96 |
100 |
N/A |
100 |
SRM test failures - User timeout
|
| 03/01/17 |
100 |
100 |
100 |
94 |
100 |
N/A |
100 |
SRM test failures - User timeout
|
- It was reported that CMS are seeing poor CMS efficiencies across all Tier1s.
- We had to connect to Vidyo using the phone link. Will try and get Vidyo client fixed in our meeting room.
