RAL Tier1 Operations Report for 29th October 2014 (DRAFT)
| Review of Issues during the week 22nd to 29th October 2014.
|
- A problem reported last week, with a user filling up the spool areas on the ARC CEs has been fixed. The user was contacted (and responded) and in addition an automated process that cleans up the large log files put in place.
| Resolved Disk Server Issues
|
- GDSS673 (lhcbRawRdst - D0T1) failed around 7am on Sunday morning (26th Oct). A faulty disk drive was found. The server was checked out and firmware updated. It was returned to service during thw working day yesterday (Tuesday 28th).
- As reported last week: GDSS763 (AtlasDataDisk - D1T0) had failed for the third time on around a month. This system has been completely drained and is undergoing further investigations.
| Current operational status and issues
|
| Ongoing Disk Server Issues
|
| Notable Changes made this last week.
|
- The production FTS3 service was upgraded to version 3.2.29-1 on Monday (20th Oct).
- Yesterday, Tueday 21st, an Oracle update was applied to the OGMA (Atlas 3D) database system. This morning it was switched to update the Atlas 3D information from CERN using Oracle GoldenGate, rather than Oracle Streams. This update was done during a planned Atlas test. However, it transpired that another site was had load issues with their Frontier/database system and the updated OGMA/Frontier system was returned to service very quickly after completing the change. (This alleviates a problem whereby the replacement database system for OGMA ("Cronos") was not performing well enough owing to limitations of the disk array being used temporarily within that system.)
| Service
|
Scheduled?
|
Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
|
| arc-ce01.gridpp.rl.ac.uk
|
UNSCHEDULED
|
OUTAGE
|
20/10/2014 13:45
|
23/10/2014 17:00
|
3 days, 3 hours and 15 minutes
|
Investigating problems with the ARC CE.
|
| Advanced warning for other interventions
|
| The following items are being discussed and are still to be formally scheduled and announced.
|
- The Oracle regular "PSU" patches will be applied to the Pluto Castor standby database system on Monday (27th Oct) and to the Pluto production database on Wednesday (29th Oct). This is expected to be a transparent intervention. The 'Pluto' database hosts the Castor Nameserver as well as the CMS and LHCb stager databases.
- 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.
Listing by category:
- Databases:
- Apply latest Oracle patches (PSU) to the production database systems (Castor, LFC). (Underway).
- A new database (Oracle RAC) has been set-up to host the Atlas3D database. This is updated from CERN via Oracle GoldenGate.
- 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 22nd and 29th October 2014.
|
| Service
|
Scheduled?
|
Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
|
| arc-ce01.gridpp.rl.ac.uk
|
UNSCHEDULED
|
OUTAGE
|
20/10/2014 13:45
|
23/10/2014 17:00
|
3 days, 3 hours and 15 minutes
|
Investigating problems with the ARC CE.
|
| lcgwms06.gridpp.rl.ac.uk,
|
UNSCHEDULED
|
OUTAGE
|
15/10/2014 12:00
|
15/10/2014 16:37
|
4 hours and 37 minutes
|
Problems following EMI update
|
| Open GGUS Tickets (Snapshot during morning of meeting)
|
| GGUS ID |
Level |
Urgency |
State |
Creation |
Last Update |
VO |
Subject
|
| 109608
|
Green
|
Urgent
|
Waitig for Reply
|
2014-10-24
|
2014-10-28
|
|
LFC denies existence of new user
|
| 109399
|
Green
|
Less Urgent
|
In Progress
|
2014-10-17
|
2014-10-24
|
|
[Rod Dashboard] Issues detected at RAL-LCG2 (CE problems)
|
| 109276
|
Green
|
Less Urgent
|
In Progress
|
2014-10-11
|
2014-10-27
|
CMS
|
Submissions to RAL FTS3 REST interface are failing for some users
|
| 108944
|
Green
|
Urgent
|
In Progress
|
2014-10-01
|
2014-10-27
|
CMS
|
AAA access test failing at T1_UK_RAL
|
| 107935
|
Red
|
Less Urgent
|
On Hold
|
2014-08-27
|
2014-10-15
|
Atlas
|
BDII vs SRM inconsistent storage capacity numbers
|
| 107880
|
Red
|
Less Urgent
|
In Progress
|
2014-08-26
|
2014-10-15
|
SNO+
|
srmcp failure
|
| 106324
|
Red
|
Urgent
|
On Hold
|
2014-06-18
|
2014-10-13
|
CMS
|
pilots losing network connections at T1_UK_RAL
|
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
|
| 22/10/14 |
100 |
100 |
100 |
98.9 |
100 |
99 |
100 |
Problems with the ARC CEs.
|
| 23/10/14 |
100 |
100 |
98.3 |
72.6 |
88.0 |
99 |
99 |
Some SRM test failures at around 08:00 - 09:30 local time. Compunded by some (ARC) CE test failures.
|
| 24/10/14 |
100 |
100 |
98.3 |
99.3 |
100 |
100 |
100 |
Atlas: Pair of SRM test failures (User timeout): CMS: Batch (ARC CE issues)
|
| 25/10/14 |
100 |
100 |
100 |
98.6 |
100 |
100 |
98 |
Batch (ARC CE issues)
|
| 26/10/14 |
100 |
100 |
100 |
99.4 |
99.1 |
100 |
n/a |
CMS: Batch (ARC CE issues); LHCb: SRM test failure (No such file or directory).
|
| 27/10/14 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
| 28/10/14 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
