RAL Tier1 Operations Report for 18th February 2015
| Review of Issues during the week 11th to 18th February 2015.
|
- On Monday morning the Tier1 data link failed. This is the link between the Tier1 routers and the UKLight router). All data transfers stopped. The problem lasted for around an hour from 09:00.
- A single file loss was reported to Atlas. This was picked up by the regular checksum valdiation process.
| Resolved Disk Server Issues
|
- GDSS656 (LHCbRawRdst - D1T0) failed on Thursday afternoon (12th Feb). It was returned to service on the Saturday morning (14th Feb). A disk drive failed while verifying the RAID array.
| Current operational status and issues
|
- We are running with a single router connecting the Tier1 network to the site network, rather than a resilient pair.
| Ongoing Disk Server Issues
|
| Notable Changes made this last week.
|
- Condor update to version 8.2.7 applied to CEs and other internal Condor systems.
- Test/first roll-out deployments of condor 8.2.7 and cvmfs-client 2.1.20 on Worker nodes.
- Both production Atlas Frontier machines are now using Cronos as the Atlas 3D database backend instead of Ogma.
| Service
|
Scheduled?
|
Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
|
| Whole site
|
SCHEDULED
|
WARNING
|
19/02/2015 07:45
|
19/02/2015 08:30
|
45 minutes
|
Warning during test of network router. We expect a 5 minute break in connectivity to site sometime during this window.
|
| Advanced warning for other interventions
|
| The following items are being discussed and are still to be formally scheduled and announced.
|
- Investigate problems on the primary Tier1 router. Discussions with the vendor are ongoing and a test is scheduled for tomorrow morning (19th Feb).
- Physical move of 2011 disk server racks to make space for new delivery.
Listing by category:
- Databases:
- Switch LFC/3D to new Database Infrastructure.
- Update to Oracle 11.2.0.4
- Castor:
- Update SRMs to new version (includes updating to SL6).
- Fix discrepancies were found in some of the Castor database tables and columns. (The issue has no operational impact.)
- Update Castor to 2.1-14-latest.
- Networking:
- Resolve problems with primary Tier1 Router
- Move switches connecting the 2011 disk servers batches onto the Tier1 mesh network.
- Make routing changes to allow the removal of the UKLight Router.
- Enable the RIP protocol for updating routing tables on the Tier1 routers. (Install patch to Router software).
- Fabric
- Physical move of 2011 disk server racks to make space for new delivery.
- Firmware updates on remaining EMC disk arrays (Castor, FTS/LFC)
| Entries in GOC DB starting since the last report.
|
| Service
|
Scheduled?
|
Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
|
| All Castor (all SRM endpoints).
|
SCHEDULED
|
WARNING
|
11/02/2015 08:30
|
11/02/2015 15:00
|
6 hours and 30 minutes
|
Castor services At Risk during application of regular patches to back end database systems.
|
| Open GGUS Tickets (Snapshot during morning of meeting)
|
| GGUS ID |
Level |
Urgency |
State |
Creation |
Last Update |
VO |
Subject
|
| 111699
|
Green
|
Less Urgent
|
Waiting Reply
|
2015-02-10
|
2015-02-18
|
Atlas
|
gLExec hammercloud jobs keep failing at RAL-LCG2 & RALPP
|
| 111120
|
Green
|
Less Urgent
|
Waiting Reply
|
2015-01-12
|
2015-01-22
|
Atlas
|
large transfer errors from RAL-LCG2 to BNL-OSG2
|
| 109694
|
Red
|
Urgent
|
Waiting Reply
|
2014-11-03
|
2015-02-18
|
SNO+
|
gfal-copy failing for files at RAL
|
| 108944
|
Red
|
Urgent
|
In Progress
|
2014-10-01
|
2015-02-18
|
CMS
|
AAA access test failing at T1_UK_RAL
|
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
|
| 11/02/15 |
100 |
100 |
100 |
100 |
100 |
100 |
98 |
|
| 12/02/15 |
100 |
100 |
100 |
100 |
100 |
100 |
99 |
|
| 13/02/15 |
100 |
100 |
100 |
100 |
100 |
100 |
99 |
|
| 14/02/15 |
100 |
100 |
100 |
100 |
100 |
98 |
99 |
|
| 15/02/15 |
100 |
100 |
100 |
100 |
100 |
100 |
97 |
|
| 16/02/15 |
100 |
100 |
95.0 |
96.0 |
96.0 |
100 |
96 |
Break in network connectivity for data path
|
| 17/02/15 |
100 |
100 |
100 |
100 |
100 |
100 |
99 |
|
