Difference between revisions of "Tier1 Operations Report 2016-02-24"
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| − | * GDSS658 (AtlasScratchDisk - D1T0) reported problems overnight on Thursday/Friday 18/19 Feb. It was taken out of service for a short while on the | + | * GDSS658 (AtlasScratchDisk - D1T0) reported problems overnight on Thursday/Friday 18/19 Feb. It was taken out of service for a short while on the Friday while it underwent checks. |
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| − | * | + | * Completed Condor updates (to version 8.4.4) on batches of worker nodes. |
* Many Linux errata updates. | * Many Linux errata updates. | ||
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| + | * The Castor 2.1.15 update will soon be scheduled. We are hopeful of carrying out the Nameserver part of the update (requiring a Castor down) next week. | ||
'''Listing by category:''' | '''Listing by category:''' | ||
* Databases: | * Databases: | ||
Latest revision as of 09:21, 24 February 2016
RAL Tier1 Operations Report for 24th February 2016
| Review of Issues during the week 17th to 24th February 2016. |
- Some problems with the Atlas SRMs on Wednesday (17th Feb) - with some SAM tests failing during the evening. Fixed by
restarting the front end processes.
- The traffic on the OPN link this last week was significant but not so as to cause concern.
| Resolved Disk Server Issues |
- GDSS658 (AtlasScratchDisk - D1T0) reported problems overnight on Thursday/Friday 18/19 Feb. It was taken out of service for a short while on the Friday while it underwent checks.
| 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 |
- None
| Notable Changes made since the last meeting. |
- Completed Condor updates (to version 8.4.4) on batches of worker nodes.
- Many Linux errata updates.
| Declared in the GOC DB |
| 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. |
| 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 are hopeful of carrying out the Nameserver part of the update (requiring a Castor down) next week.
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 |
|---|---|---|---|---|---|---|
| All Castor (all SRM endpoints) | SCHEDULED | WARNING | 23/02/2016 13:30 | 23/02/2016 16:30 | 3 hours | Warning period after glic upgrades. |
| lcgfts3.gridpp.rl.ac.uk | SCHEDULED | WARNING | 23/02/2016 10:30 | 23/02/2016 11:30 | 1 hour | Updating the fts3 servers due to glibc updates |
| All Castor (all SRM endpoints) | SCHEDULED | OUTAGE | 23/02/2016 09:30 | 23/02/2016 13:30 | 4 hours | Downtime on RAL Storage for glibC updates |
| Open GGUS Tickets (Snapshot during morning of meeting) |
| GGUS ID | Level | Urgency | State | Creation | Last Update | VO | Subject |
|---|---|---|---|---|---|---|---|
| 119389 | Green | Urgent | Waiting Reply | 2016-02-05 | 2016-02-12 | LHCb | Data transfer problem to RAL BUFFER |
| 118809 | Yellow | 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... |
| Availability Report |
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 |
|---|---|---|---|---|---|---|---|---|
| 17/02/16 | 100 | 100 | 90 | 100 | 100 | 94 | 100 | Failed some SRM tests (could not open connection to srm-atlas.gridpp.rl.ac.uk:8443). Fixed by restarting SRM Front end daemons. |
| 18/02/16 | 100 | 100 | 98 | 100 | 100 | 95 | 100 | Single SRM Test failure. (could not open connection to srm-atlas.gridpp.rl.ac.uk:8443) |
| 19/02/16 | 100 | 100 | 100 | 100 | 100 | 92 | 100 | |
| 20/02/16 | 100 | 100 | 100 | 100 | 100 | 97 | 88 | |
| 21/02/16 | 100 | 100 | 100 | 100 | 100 | 100 | 94 | |
| 22/02/16 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
| 23/02/16 | 82.3 | 100 | 84 | 87 | 87 | 100 | 100 | Outage of Castor for application of security update with all systems rebooted. |
