RAL Tier1 Operations Report for 21st June 2017
| Review of Issues during the week 14th to 21st June 2017.
|
- Problems with the Echo gateways were reported last week. These coincide with a large increase in requests. In response the xrootd gateway was stopped for a few days and a concurrent connection limit applied to the GridFTP gateways. High memory usage was observed and steps are being taken to rectify this.
| Resolved Disk Server Issues
|
- GDSS732 (LHCbDst - D1T0) failed early afternoon on Wednesday 14th June. It was returned to service the following day. One disk drive was replaced and one file declared lost from the failure.
- GDSS819 (LHCbDst - D1T0) failed in the early hours of Saturday morning (17th June). It was returned to service, initially read-only, later that day.
| 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. CMS are also looking at file access performance and have turned off "lazy-download". The CMS SRM SAM test success rate has improved since the Castor 2.1.16 upgrade on the 25th May, although is still not 100%. It is still planned to re-visit this issue now Castor has been upgraded.
- There is a problem on the site firewall which is causing problems for some specific data flows. This was being investigated in connection with videoconferencing problems. It is expected that this is having an effect on our data that flows through the firewall (such as to/from worker nodes).
| Ongoing Disk Server Issues
|
| Limits on concurrent batch system jobs.
|
| Notable Changes made since the last meeting.
|
- An internal (transparent) change to the Echo CEPH CMS pool was made to increase the number of placement groups. This improves the distribution of data and is being done ahead of adding more hardware capacity.
| 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:
- Increase OPN link to CERN from 2*10Gbit to 3*10Gbit links (delayed until 28th June).
- Firmware updates in OCF 14 disk servers.
- Upgrade the FTS3 service to a version that will no longer support the SOAP interface.
- Increase the number of placement groups in the Atlas Echo CEPH pool.
Listing by category:
- Castor:
- Move to generic Castor headnodes.
- Merge AtlasScratchDisk into larger Atlas disk pool.
- Echo:
- Increase the number of placement groups in the Atlas Echo CEPH pool.
- Networking
- Increase OPN link to CERN from 2*10Gbit to 3*10Gbit links.
- Enable first services on production network with IPv6 now that the addressing scheme has been agreed. (Perfsonar already working over IPv6).
- Services
- The production FTS needs updating. This will no longer support the SOAP interface. (The "test" FTS , used by Atlas, has already been upgraded.)
| Entries in GOC DB starting since the last report.
|
| Open GGUS Tickets (Snapshot during morning of meeting)
|
| GGUS ID |
Level |
Urgency |
State |
Creation |
Last Update |
VO |
Subject
|
| 129072
|
Green
|
Less Urgent
|
In Progress
|
2017-06-20
|
2017-06-20
|
|
Please remove vo.londongrid.ac.uk from RAL-LCG2 resources
|
| 129059
|
Green
|
Very Urgent
|
In Progress
|
2017-06-20
|
2017-06-20
|
LHCb
|
Timeouts on RAL Storage
|
| 128991
|
Green
|
Less Urgent
|
In Progress
|
2017-06-16
|
2017-06-16
|
Solid
|
solidexperiment.org CASTOR tape support
|
| 128954
|
Green
|
Less Urgent
|
In Progress
|
2017-06-14
|
2017-06-20
|
SNO+
|
Tape storage failure
|
| 128830
|
Yellow
|
Less Urgent
|
Waiting For Reply
|
2017-06-07
|
2017-06-07
|
Pheno
|
Jobs failing at RAL due errors with gfal2
|
| 127612
|
Red
|
Alarm
|
In Progress
|
2017-04-08
|
2017-05-19
|
LHCb
|
CEs at RAL not responding
|
| 127597
|
Red
|
Urgent
|
On Hold
|
2017-04-07
|
2017-06-14
|
CMS
|
Check networking and xrootd RAL-CERN performance
|
| 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
|
2017-05-10
|
|
CASTOR at RAL not publishing GLUE 2.
|
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 Echo |
Atlas HC |
Atlas HC Echo |
CMS HC |
Comment
|
| 14/06/17 |
100 |
100 |
100 |
99 |
96 |
100 |
100 |
81 |
100 |
SRM test failures. CMS: User timeouts. LHCb: There is no data for the SRM tests, the other tests seem fine.
|
| 15/06/17 |
100 |
100 |
100 |
98 |
100 |
100 |
98 |
100 |
100 |
SRM test failures. (User timeouts).
|
| 16/06/17 |
100 |
100 |
100 |
98 |
100 |
100 |
100 |
100 |
N/A |
SRM test failures. (User timeouts).
|
| 17/06/17 |
100 |
100 |
98 |
99 |
100 |
100 |
100 |
100 |
100 |
SRM test failures. (User timeouts).
|
| 18/06/17 |
100 |
100 |
100 |
94 |
95 |
100 |
100 |
100 |
100 |
CMS: Could not open connection to srm-cms.gridpp.rl.ac.uk; LHCb: Could not open connection to srm-lhcb.gridpp.rl.ac.uk – Both CMS and LHCb test failures occurred at similar times (17:00 CET).
|
| 18/06/17 |
100 |
100 |
100 |
98 |
100 |
100 |
100 |
98 |
100 |
SRM test failures. (User timeouts).
|
| 20/06/17 |
100 |
100 |
100 |
99 |
100 |
100 |
100 |
100 |
98 |
Single SRM test failure. (User timeout).
|
- None yet. Note this is a "virtual" meeting. This report is produced and comments invited.
|
