Difference between revisions of "Tier1 Operations Report 2014-12-03"
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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 26th November to 3rd December 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 26th November to 3rd December 2014. | ||
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Revision as of 15:39, 2 December 2014
RAL Tier1 Operations Report for 3rd December 2014
Review of Issues during the week 26th November to 3rd December 2014. |
- None
Resolved Disk Server Issues |
- None
Current operational status and issues |
- There were continuing problems with the CMS transfer manager machine (lcgclsf02) failing over the weekend (29th and 30th November) and again on Tuesday morning. These have now been traced to the xrootd redirector process running on the box. We are taking steps to stop this in future.
- The problem of locking sessions in the Castor database that affected CMS & LHCb recurred on the morning of Tuesday 2nd December. Whilst this was transitory the cause has been understood and a fix will be provided in a future version of Castor.
Ongoing Disk Server Issues |
- None.
Notable Changes made this last week. |
- LHCb Castor headnodes were updated to SL6 on Tuesday 2nd December
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 26th November and 3rd December 2014. |
Service | Scheduled? | Outage/At Risk | Start | End | Duration | Reason |
---|---|---|---|---|---|---|
srm-lhcb-tape.gridpp.rl.ac.uk, srm-lhcb.gridpp.rl.ac.uk, | SCHEDULED | OUTAGE | 02/12/2014 10:00 | 02/12/2014 14:00 | 4 hours | OS upgrade (SL6) on headnodes for LHCb Castor instance. |
Open GGUS Tickets (Snapshot during morning of meeting) |
GGUS ID | Level | Urgency | State | Creation | Last Update | VO | Subject |
---|---|---|---|---|---|---|---|
110497 | Green | Less Urgent | In Progress | 2014-12-02 | 2014-11-02 | [Rod Dashboard] Issues detected at RAL-LCG2 | OPS |
110397 | Green | Less Urgent | In Progress | 2014-11-26 | 2014-11-27 | Unable to access LFC webdav interface via browser | dteam |
110382 | Green | Less Urgent | In Progress | 2014-11-26 | 2014-11-26 | RAL-LCG2: please reinstall your perfsonar hosts(s) | N/A |
109712 | Amber | Urgent | In Progress | 2014-10-29 | 2014-11-27 | CMS | Glexec exited with status 203; ... |
109694 | Green | Urgent | On hold | 2014-11-03 | 2014-11-26 | SNO+ | gfal-copy failing for files at RAL |
108944 | Amber | Urgent | In Progress | 2014-10-01 | 2014-11-26 | 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 | 2014-11-27 | 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 |
---|---|---|---|---|---|---|---|---|
26/11/14 | 100 | 100 | 100 | 100 | 100 | 99 | n/a | |
27/11/14 | 100 | 100 | 100 | 100 | 100 | 98 | n/a | |
28/11/14 | 100 | 100 | 98.1 | 100 | 100 | 100 | n/a | |
29/11/14 | 100 | 100 | 100 | 98.5 | 100 | 100 | n/a | Start of problems with CMS Castor scheduler headnode. |
30/11/14 | 100 | 100 | 100 | 73.0 | 100 | 100 | n/a | Problems with CMS Castor scheduler headnode. |
01/12/14 | 100 | 100 | 99.2 | 95.9 | 91.9 | 100 | n/a | |
02/12/14 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |