RAL Tier1 Operations Report for 2nd March 2016
| Review of Issues during the week 24th February to 2nd March 2016.
|
- Some problems with the Atlas SRMs on Tuesday (1st Mar) between 11 and 12:00. Fixed by restarting the front end processes.
- There was a problem in the "CIP" machine that inputs Castor information to the BDIIs. The standby CIP was used between Thursday (25th Feb) and Monday (29th Feb) before reverting to the normal one after its repair.
| 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
|
| Notable Changes made since the last meeting.
|
- NIS Master node upgraded.
| Service
|
Scheduled?
|
Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
|
| lcgfts3.gridpp.rl.ac.uk,
|
SCHEDULED
|
WARNING
|
03/03/2016 10:00
|
03/03/2016 11:00
|
1 hour
|
Update of Production FTS3 service to version 3.4.2
|
| Advanced warning for other interventions
|
| The following items are being discussed and are still to be formally scheduled and announced.
|
- The Castor 2.1.15 update will soon be scheduled. We await successful completion of testing before scheduling.
Listing by category:
- Databases:
- Switch LFC/3D to new Database Infrastructure.
- Castor:
- Update SRMs to new version (includes updating to SL6).
- Update to Castor version 2.1.15.
- 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*10Gbit.
- Fabric
- Firmware updates on remaining EMC disk arrays (Castor, LFC)
- Grid Services
- A Load Balancer (HAProxy) will be used in front of the FTS service.
| Entries in GOC DB starting since the last report.
|
| Service
|
Scheduled?
|
Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
|
| Whole site
|
SCHEDULED
|
WARNING
|
01/03/2016 09:00
|
01/03/2016 12:00
|
3 hours
|
Warning on Site during an infrastucture upgrade.
|
| Open GGUS Tickets (Snapshot during morning of meeting)
|
| GGUS ID |
Level |
Urgency |
State |
Creation |
Last Update |
VO |
Subject
|
| 119841
|
Green
|
Less Urgent
|
In Progress
|
2016-03-01
|
2016-03-01
|
LHCb
|
HTTP support for lcgcadm04.gridpp.rl.ac.uk
|
| 119389
|
Green
|
Urgent
|
Waiting Reply
|
2016-02-05
|
2016-02-12
|
LHCb
|
Data transfer problem to RAL BUFFER
|
| 118809
|
Amber
|
Urgent
|
On Hold
|
2016-01-05
|
2016-01-13
|
|
Towards a recommendation on how to configure memory limits for batch jobs
|
| 117683
|
Green
|
Less Urgent
|
In Progress
|
2015-11-18
|
2016-02-17
|
|
CASTOR at RAL not publishing GLUE 2
|
| 116864
|
Red
|
Urgent
|
In Progress
|
2015-10-12
|
2016-01-29
|
CMS
|
T1_UK_RAL AAA opening and reading test failing again...
|
Key: Atlas HC = Atlas HammerCloud (Queue ANALY_RAL_SL6, Template 508); CMS HC = CMS HammerCloud
| Day |
OPS |
Alice |
Atlas |
CMS |
LHCb |
Atlas HC |
CMS HC |
Comment
|
| 24/02/16 |
100 |
100 |
100 |
100 |
100 |
97 |
100 |
|
| 25/02/16 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
| 26/02/16 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
| 27/02/16 |
100 |
100 |
100 |
100 |
100 |
100 |
N/A |
|
| 28/02/16 |
100 |
100 |
100 |
100 |
100 |
91 |
100 |
|
| 29/02/16 |
100 |
100 |
100 |
100 |
100 |
97 |
100 |
|
| 01/03/16 |
100 |
100 |
100 |
95 |
100 |
93 |
100 |
Single SRM Test failure on PUT (User timeout).
|
