RAL Tier1 Operations Report for 6th September 2017
| Review of Issues during the week 30th August to 6th September 2017.
|
- There were further problems with Echo at the end of last week. These appear similar to those of the previous week but we believe are now better understood. Media errors in the hardware that has been added into Echo exposed a bug in the CEPH Erasure Coding when back-filling. Furthermore a problem in the Echo gateways when a CEPH placement group is unavailable (as in this case) requires that the gateways be stopped while the problem is fixed.
| Resolved Disk Server Issues
|
- GDSS746 (AtlasDataDisk - D1T0) was unavailable for around six hours yesterday (Tuesday 5th Sep) after a replacement drive for a fault also failed.
| Current operational status and issues
|
- We were seeing a high rate of failures of the CMS SAM tests against the SRM which affected our (CMS) availabilities. The last few weeks have shown significantly better availability test results - although it is not understood why. We continue to monitor this.
- There is a problem on the site firewall which is causing problems for some specific data flows. Discussions have been taking place with the vendor. 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.
|
- Further services migrated from our old Windows HyperV2008 infrastructure to hypervisors running HyperV2012 as we prepare to fully decommission the HyperV2008 systems.
- On the 30th August the site firewall was upgrade to a newer more supported version of software.
| 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:
- Upgrade the FTS3 service to a version that will no longer support the SOAP interface. The SOAP interface was disabled on Monday (17th July).
- Re-distribute the data in Echo onto the 2015 capacity hardware. (Ongoing)
Listing by category:
- Castor:
- Move to generic Castor headnodes.
- Echo:
- Re-distribute the data in Echo onto the remaining 2015 capacity hardware.
- Networking
- Extend the number of services on the production network with IPv6 dual stack. (Done for Perfsonar, all squids and the CVMFS Stratum-1 servers).
- Services
- The production FTS will be updated now the requirement to support the deprecated SOAP interface has been removed.
| Entries in GOC DB starting since the last report.
|
| Service
|
Scheduled?
|
Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
|
| gridftp.echo.stfc.ac.uk, s3.echo.stfc.ac.uk, xrootd.echo.stfc.ac.uk
|
UNSCHEDULED
|
OUTAGE
|
01/09/2017 12:00
|
01/09/2017 17:00
|
5 hours
|
Problems with Ceph/Echo instance at RAL
|
| gridftp.echo.stfc.ac.uk, s3.echo.stfc.ac.uk, xrootd.echo.stfc.ac.uk
|
UNSCHEDULED
|
OUTAGE
|
31/08/2017 19:30
|
01/09/2017 13:00
|
17 hours and 30 minutes
|
Problems with Ceph, service is degraded
|
| srm-superb.gridpp.rl.ac.uk
|
SCHEDULED
|
OUTAGE
|
20/07/2017 16:00
|
30/08/2017 13:00
|
40 days, 21 hours
|
SuperB no longer supported on Castor storage. Retiring endpoint.
|
| srm-hone.gridpp.rl.ac.uk
|
SCHEDULED
|
OUTAGE
|
20/07/2017 16:00
|
30/08/2017 13:00
|
40 days, 21 hours
|
H1 no longer supported on Castor storage. Retiring endpoint.
|
| Open GGUS Tickets (Snapshot during morning of meeting)
|
| GGUS ID |
Level |
Urgency |
State |
Creation |
Last Update |
VO |
Subject
|
| 130207
|
Green
|
Urgent
|
Waiting for Reply
|
2017-08-24
|
2017-08-31
|
MICE
|
Timeouts when copying MICE reco data to CASTOR
|
| 130193
|
Green
|
Urgent
|
In Progress
|
2017-08-23
|
2017-09-04
|
CMS
|
Staging from RAL tape systems
|
| 128991
|
Green
|
Less Urgent
|
On Hold
|
2017-06-16
|
2017-08-24
|
Solid
|
solidexperiment.org CASTOR tape support
|
| 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
|
2017-07-06
|
|
CASTOR at RAL not publishing GLUE 2.
|
| Day |
OPS |
Alice |
Atlas |
CMS |
LHCb |
Atlas Echo |
Comment
|
| 30/08/17 |
100 |
100 |
100 |
100 |
100 |
100 |
|
| 31/08/17 |
100 |
100 |
100 |
100 |
100 |
100 |
|
| 01/09/17 |
97.9 |
100 |
100 |
100 |
100 |
100 |
CE test failures. (Possibly triggered by problems on Echo).
|
| 02/09/17 |
100 |
100 |
100 |
100 |
100 |
100 |
|
| 03/09/17 |
100 |
100 |
100 |
100 |
100 |
100 |
|
| 04/09/17 |
100 |
100 |
100 |
100 |
100 |
100 |
|
| 05/09/17 |
100 |
100 |
100 |
100 |
100 |
100 |
|
Key: Atlas HC = Atlas HammerCloud (Queue ANALY_RAL_SL6, Template 845); Atlas HC Echo = Atlas Echo (Template 841);CMS HC = CMS HammerCloud
| Day |
Atlas HC |
Atlas HC Echo |
CMS HC |
Comment
|
| 30/08/17 |
100 |
100 |
100 |
|
| 31/08/17 |
100 |
86 |
100 |
|
| 01/09/17 |
99 |
51 |
100 |
|
| 02/09/17 |
100 |
100 |
100 |
|
| 03/09/17 |
98 |
100 |
100 |
|
| 04/09/17 |
92 |
95 |
100 |
|
| 05/09/17 |
85 |
96 |
98 |
|
- There has been a successful test transfer of CMS data into Echo using PhEDEx.
