Difference between revisions of "Tier1 Operations Report 2014-11-26"
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| style="background-color: #b7f1ce; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Review of Issues during the week 19th to 26th November 2014. | | style="background-color: #b7f1ce; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Review of Issues during the week 19th to 26th November 2014. | ||
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− | + | * On the evening of Tuesday 18th, the CMS transfer manager machine (lcgclsf02) failed. The services failed over to the backup. A replacement machine was prepared and put into service that afternoon. The following day the original system was fixed and returned to service. | |
− | * On the evening of Tuesday 18th, the CMS transfer manager machine (lcgclsf02) failed. The services failed over to the backup | + | * I the early hours of Friday 21st Nov. there was a problem of locking sessions in the Castor database that affected CMS & LHCb. |
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Revision as of 11:57, 26 November 2014
RAL Tier1 Operations Report for 26th November 2014
Review of Issues during the week 19th to 26th November 2014. |
- On the evening of Tuesday 18th, the CMS transfer manager machine (lcgclsf02) failed. The services failed over to the backup. A replacement machine was prepared and put into service that afternoon. The following day the original system was fixed and returned to service.
- I the early hours of Friday 21st Nov. there was a problem of locking sessions in the Castor database that affected CMS & LHCb.
Resolved Disk Server Issues |
- None
Current operational status and issues |
- Some problems on Atlas Castor instance. At various times in the last couple of weeks the Atlas workload has led to differing groups of disk servers spending a lot of time in a "wait i/o" state. This is triggered by the numbers of reads using xroot and has led to some SAM test failures.
Ongoing Disk Server Issues |
- GDSS673 (LhcbRawDst - D0T1) failed during the evening of Friday 14th November. The server is still undergoing checks. There are two files on the server that had not been migrated to tape.
Notable Changes made this last week. |
- Made 4 GB the default memory limit for LHCb jobs on arc-ce01.
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. |
- The rollout of the RIP protocol to the Tier1 routers still has to be completed.
- First quarter 2015: Circuit testing of the remaining (i.e. non-UPS) circuits in the machine room.(Provisional dates: week 12-16 January).
- Castor headnode upgrades to SL6: (Assume 4 hour outage of Castor instance in each case for stager updates).
- Tuesday 2nd Dec - LHCb; Tues 9th Dec - CMS; Wed 10th Dec - Atlas; Wednesday 7th Jan - GEN; Thursday 8th Jan - Nameserver (transparent - at risk)
Listing by category:
- Databases:
- A new database (Oracle RAC) has been set-up to host the Atlas 3D database. This is updated from CERN via Oracle GoldenGate. This system is yet to be brought into use. (Currently Atlas 3D/Frontier still uses the OGMA datase system, although this was also changed to update from CERN using Oracle Golden Gate.)
- Switch LFC/3D to new Database Infrastructure.
- Castor:
- Update Castor headnodes to SL6.
- Fix discrepancies were found in some of the Castor database tables and columns. (The issue has no operational impact.)
- Networking:
- Move switches connecting the 2011 disk servers batches onto the Tier1 mesh network.
- Make routing changes to allow the removal of the UKLight Router.
- Enable the RIP protocol for updating routing tables on the Tier1 routers.
- Fabric
- Migration of data to new T10KD tapes. (Migration of CMS from 'B' to 'D' tapes underway; migration of GEN from 'A' to 'D' tapes to follow.)
- Firmware updates on remaining EMC disk arrays (Castor, FTS/LFC)
- There will be circuit testing of the remaining (i.e. non-UPS) circuits in the machine room (Expected first quarter 2015).
Entries in GOC DB starting between the 19th and 26th November 2014. |
Service | Scheduled? | Outage/At Risk | Start | End | Duration | Reason |
---|---|---|---|---|---|---|
Castor (srm endpoints). | SCHEDULED | WARNING | 25/11/2014 11:00 | 25/11/2014 12:00 | 1 hour | At risk on some castor instances while we deploy errata updates |
Whole site | UNSCHEDULED | WARNING | 25/11/2014 07:00 | 25/11/2014 08:00 | 1 hour | Site warning during firewall configuration change. |
lcgfts3.gridpp.rl.ac.uk, | SCHEDULED | WARNING | 24/11/2014 10:00 | 24/11/2014 12:00 | 2 hours | At risk for FTS3 upgrade to 3.2.30 |
srm-cms-disk.gridpp, srm-cms.gridpp.rl.ac.uk | UNSCHEDULED | WARNING | 20/11/2014 14:00 | 20/11/2014 15:00 | 1 hour | At risk while we return a CMS Castor headnode to production |
Open GGUS Tickets (Snapshot during morning of meeting) |
GGUS ID | Level | Urgency | State | Creation | Last Update | VO | Subject |
---|---|---|---|---|---|---|---|
110360 | Green | Less Urgent | Waiting for Reply | 2014-11-25 | 2014-11-25 | SNO+ | Jobs failing to load cvmfs data |
110244 | Green | Less Urgent | In progress | 2014-11-19 | 2014-11-24 | None | LFC Webdav support |
109712 | Green | Urgent | On Hold | 2014-10-29 | 2014-11-10 | CMS | Glexec exited with status 203; ... |
109694 | Green | Urgent | On hold | 2014-11-03 | 2014-11-24 | SNO+ | gfal-copy failing for files at RAL |
109276 | Green | Urgent | In Progress | 2014-22 | 2014-24 | SNO+ | gfal-copy failing for files at RAL (re-opened) |
108944 | Amber | Urgent | In Progress | 2014-10-01 | 2014-11-24 | CMS | AAA access test failing at T1_UK_RAL |
107935 | Red | Less Urgent | On Hold | 2014-08-27 | 2014-11-03 | Atlas | BDII vs SRM inconsistent storage capacity numbers |
106324 | Red | Urgent | On Hold | 2014-06-18 | 2014-10-13 | CMS | pilots losing network connections at T1_UK_RAL |
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 |
---|---|---|---|---|---|---|---|---|
19/11/14 | 100 | 100 | 98.3 | 92.8 | 100 | 100 | n/a | SRM test failures. For CMS there was a general problem affecting multiple sites. |
20/11/14 | 100 | 100 | 99.2 | 99.3 | 100 | 99 | n/a | Single SRM test failures. |
21/11/14 | 100 | 100 | 95.8 | 92.4 | 91.7 | 99 | n/a | SRM test failures caused by problem of locking sessions in database. |
22/11/14 | 100 | 100 | 100 | 100 | 100 | 100 | n/a | |
23/11/14 | 100 | 100 | 100 | 100 | 100 | 87 | 95 | |
24/11/14 | 100 | 100 | 100 | 100 | 95.8 | 96 | n/a | Single SRM test failure. |
25/11/14 | 100 | 100 | 99.1 | 100 | 100 | 100 | n/a | Expired proxy affected Atlas tests for many sites. |