RAL Tier1 Operations Report for 15th April 2015
| Review of Issues during the week 8th to 15th April 2015.
|
- On Wednesday 8th April a minor network change triggered a wider problem across the Tier1 network and caused significant disruption of services. The planned Castor upgrade for that day had to be abandoned. A post mortem is being generated for this incident.
| Resolved Disk Server Issues
|
| 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.
- The bypass link from the Tier1 to the UKLR has been restored to 2 x 10Gb/s but traffic going outbound is not being correctly balanced across the two links. This is still under investigation.
- Since 27th March there has been sporadic low level packet loss on the OPN primary link to CERN. This is being investigated.
| Ongoing Disk Server Issues
|
| Notable Changes made this last week.
|
- Castor was successfully upgraded to version 2.1.14-15 this morning.
- gfal2 and davix rpms are in the process of being updated across the worker nodes.
| Service
|
Scheduled?
|
Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
|
| cream-ce01.gridpp.rl.ac.uk, cream-ce02.gridpp.rl.ac.uk
|
SCHEDULED
|
OUTAGE
|
05/05/2015 12:00
|
02/06/2015 12:00
|
28 days,
|
Decommissioning of CREAM CEs (cream-ce01.gridpp.rl.ac.uk, cream-ce02.gridpp.rl.ac.uk).
|
| All Castor (All SRMs)
|
SCHEDULED
|
OUTAGE
|
15/04/2015 09:30
|
15/04/2015 15:30
|
6 hours
|
Castor upgrade to 2.1.14-15 as this was postponed last week.
|
| Advanced warning for other interventions
|
| The following items are being discussed and are still to be formally scheduled and announced.
|
- Turn off CREAM CEs (planned for 5th May).
- Turn off ARC-CE05. This will leave four ARC CEs (as planned.) This fifth was set-up to temporarily workround a specific problem and is no longer required.
Listing by category:
- Databases:
- Switch LFC/3D to new Database Infrastructure.
- Update to Oracle 11.2.0.4. This will affect all services that use Oracle databases (Castor, LFC and Atlas Frontier)
- Castor:
- Update SRMs to new version (includes updating to SL6).
- Fix discrepancies found in some of the Castor database tables and columns. (The issue has no operational impact.)
- Networking:
- Separate some non-Tier1 services off our network so as to be able to more easily investigate the router problems.
- Resolve problems with primary Tier1 Router
- Enable the RIP protocol for updating routing tables on the Tier1 routers. (Install patch to Router software).
- Increase bandwidth of the link from the Tier1 into the RAL internal site network to 40Gbit.
- Make routing changes to allow the removal of the UKLight Router.
- Fabric
- 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 SRMs)
|
SCHEDULED
|
OUTAGE
|
15/04/2015 09:30
|
15/04/2015 15:30
|
6 hours
|
Castor upgrade to 2.1.14-15 as this was postponed last week.
|
| Whole Site
|
UNSCHEDULED
|
WARNING
|
08/04/2015 18:57
|
09/04/2015 11:00
|
16 hours and 3 minutes
|
Network problems continue at RAL
|
| Whole Site
|
UNSCHEDULED
|
OUTAGE
|
08/04/2015 18:07
|
08/04/2015 19:06
|
59 minutes
|
Network problems continue at RAL
|
| Whole Site
|
UNSCHEDULED
|
OUTAGE
|
08/04/2015 10:31
|
08/04/2015 18:03
|
7 hours and 32 minutes
|
Networking problem at RAL, we are investigating
|
| All Castor (All SRMs)
|
SCHEDULED
|
OUTAGE
|
08/04/2015 10:00
|
08/04/2015 14:00
|
4 hours
|
Upgrade of Castor storage to version 2.1.14-15
|
| Open GGUS Tickets (Snapshot during morning of meeting)
|
| GGUS ID |
Level |
Urgency |
State |
Creation |
Last Update |
VO |
Subject
|
| 113010
|
Green
|
Very Urgent
|
Waiting Reply
|
2015-04-13
|
2015-04-14
|
SNO+
|
Job statuses reported by WMS not updating
|
| 112977
|
Green
|
Very Urgent
|
In Progress
|
2015-04-10
|
2015-04-13
|
CMS
|
High failure rate for RAL!
|
| 112896
|
Green
|
Urgent
|
In Progress
|
2015-04-09
|
2015-04-09
|
CMS
|
Please check this dataset
|
| 112866
|
Green
|
Less Urgent
|
In Progress
|
2015-04-02
|
2015-04-07
|
CMS
|
Many jobs are failed/aborted at T1_UK_RAL
|
| 112819
|
Green
|
Less Urgent
|
In Progress
|
2015-04-02
|
2015-04-07
|
SNO+
|
ArcSync hanging
|
| 112721
|
Green
|
Less Urgent
|
waiting for reply
|
2015-03-28
|
2015-04-06
|
Atlas
|
RAL-LCG2: SOURCE Failed to get source file size
|
| 112713
|
Green
|
Urgent
|
In Progress
|
2015-03-27
|
2015-03-31
|
CMS
|
Please clean up unmerged area - RAL
|
| 111699
|
Yellow
|
Less Urgent
|
In Progress
|
2015-02-10
|
2015-03-23
|
Atlas
|
gLExec hammercloud jobs keep failing at RAL-LCG2 & RALPP
|
| 109694
|
Red
|
Urgent
|
In Progress
|
2014-11-03
|
2015-03-31
|
SNO+
|
gfal-copy failing for files at RAL
|
| 108944
|
Red
|
Less Urgent
|
In Progress
|
2014-10-01
|
2015-03-30
|
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
|
| 08/04/15 |
70.5 |
100 |
65.0 |
65.0 |
62.0 |
76 |
77 |
Networking problems before, and at start of, Castor upgrade (which was pulled).
|
| 09/04/15 |
100 |
100 |
100 |
100 |
100 |
100 |
97 |
|
| 10/04/15 |
100 |
100 |
100 |
100 |
100 |
100 |
84 |
|
| 11/04/15 |
100 |
100 |
100 |
100 |
100 |
100 |
95 |
|
| 12/04/15 |
100 |
100 |
100 |
100 |
100 |
100 |
97 |
|
| 13/04/15 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
| 14/04/15 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
