Difference between revisions of "Tier1 Operations Report 2015-11-04"
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− | * gdss665 (AtlasTape - D0T1) failed on Sat (24th Oct). | + | * gdss665 (AtlasTape - D0T1) failed on Sat (24th Oct). Following a disk replacement and updating the firmware in the disk controller the system was re-run through the acceptance testing for 5 days before being returned to service yesterday (3rd November). |
− | * gdss663 (AtlasTape - D0T1) failed on Sun (25th Oct). | + | * gdss663 (AtlasTape - D0T1) failed on Sun (25th Oct). Following a disk and battery replacement and updating the firmware in the disk controller the system was re-run through the acceptance testing for 5 days before being returned to service yesterday (3rd November). |
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Revision as of 10:30, 4 November 2015
RAL Tier1 Operations Report for 4th November 2015
Review of Issues during the week 28th October to 4th November 2015. |
- Early on Saturday (24/10/2015) morning, arc-ce02 developed problems. It was probably due to problems with the underlying hyper-visor. Some other less critical machines on the same hyper-visor were also affected.
- On Monday (26/10/2015) evening, there were problems with the WMS servers. A user was submitting jobs with very big output files. This was filling up the working partition on the machines.
Resolved Disk Server Issues |
- gdss665 (AtlasTape - D0T1) failed on Sat (24th Oct). Following a disk replacement and updating the firmware in the disk controller the system was re-run through the acceptance testing for 5 days before being returned to service yesterday (3rd November).
- gdss663 (AtlasTape - D0T1) failed on Sun (25th Oct). Following a disk and battery replacement and updating the firmware in the disk controller the system was re-run through the acceptance testing for 5 days before being returned to service yesterday (3rd November).
Current operational status and issues |
- The LHCb problem with 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.
- 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.
- Long-standing CMS issues. The two items that remain are CMS Xroot (AAA) redirection and file open times. Work is ongoing into the Xroot redirection with a new server having been added in recent weeks. File open times using Xroot remain slow but this is a less significant problem.
Ongoing Disk Server Issues |
- gdss707 (AtlasDataDisk - D1T0) has been out of production since Friday (16th Oct). The server is currently undergoing testing with fabric.
- gdss664 (AtlasTape - D0T1) has had a few issues starting over the weekend. This morning (28th Oct) we decided to remove it from production so it can be investigated.
Notable Changes made since the last meeting. |
- None
Declared in the GOC DB |
- None
Advanced warning for other interventions |
The following items are being discussed and are still to be formally scheduled and announced. |
- Upgrade of remaining Castor disk servers (those in tape-backed service classes) to SL6. This will be transparent to users.
- Some detailed internal network re-configurations to enable the removal of the old 'core' switch from our network. This includes changing the way the UKLIGHT router connects into the Tier1 network.
Listing by category:
- Databases:
- Switch LFC/3D to new Database Infrastructure.
- Castor:
- Update SRMs to new version (includes updating to SL6).
- Update disk servers to SL6 (ongoing)
- Update to Castor version 2.1.15.
- Networking:
- Complete changes needed to remove the old core switch from the Tier1 network.
- Make routing changes to allow the removal of the UKLight Router.
- Fabric
- Firmware updates on remaining EMC disk arrays (Castor, LFC)
Entries in GOC DB starting since the last report. |
- None
Open GGUS Tickets (Snapshot during morning of meeting) |
GGUS ID | Level | Urgency | State | Creation | Last Update | VO | Subject |
---|---|---|---|---|---|---|---|
117277 | Green | Urgent | Waiting for Reply | 2015-10-30 | 2015-11-03 | Atlas | UK RAL-LCG2 staging error "bring-online timeout has been exceeded" (over 500 errors) |
117248 | Green | Less Urgent | In Progress | 2015-10-28 | 2015-11-03 | Incorrect Certificate for SRM | |
116866 | Green | Less Urgent | On Hold | 2015-10-12 | 2015-10-19 | SNO+ | snoplus support at RAL-LCG2 (pilot role) |
116864 | Green | Urgent | In Progress | 2015-10-12 | 2015-10-26 | 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 |
---|---|---|---|---|---|---|---|---|
28/10/15 | 100 | 100 | 100 | 100 | 100 | 97 | 100 | |
29/10/15 | 100 | 100 | 100 | 100 | 100 | 93 | 100 | |
30/10/15 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
31/10/15 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
01/11/15 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
02/11/15 | 100 | 100 | 100 | 100 | 96 | 100 | 100 | Single SRM test failure. "could not open connection to srm-lhcb.gridpp.rl.ac.uk" |
03/11/15 | 100 | 100 | 100 | 100 | 100 | 91 | 100 |