RAL Tier1 Operations Report for 13th August 2014
| Review of Issues during the week 6th to 13th August 2014.
|
- There was a problem with the CMS Castor instance overnight on the 6/7 August triggered by attempts to use the disk server re-balancing feature now in Castor.
| Resolved Disk Server Issues
|
| Current operational status and issues
|
- There are ongoing problems with disk server draining in Castor (and specifically for Atlas) in Castor 2.1.4. This is under investigation.
- Discrepancies were found in some of the Castor database tables and columns. The Castor team are considering options with regard to fixing these. The issue has no operational impact.
- We are still investigating xroot access to CMS Castor following the upgrade on the 17th June. The service has improved but there may still be work to be done.
| Ongoing Disk Server Issues
|
| Notable Changes made this last week.
|
- Last Wednesday (6th Aug) 8 disk servers (total around 900TB) were deployed to AtlasDataDisk and 5 disk servers (a total of 180TB, with the servers having 10Gbit interfaces) were added to the disk cache for CMSTape. (This is in addition to the 10 disk servers (over a Petabyte of capacity) deployed into lhcbDst and reported last week).
| Service
|
Scheduled?
|
Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
|
| lcgfts.gridpp.rl.ac.uk,
|
SCHEDULED
|
OUTAGE
|
02/09/2014 11:00
|
02/10/2014 11:00
|
30 days,
|
Service being decommissioned.
|
| 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.
- We are planning the termination of the FTS2 service (announced for 2nd September) now that almost all use is on FTS3.
- The removal of the (NFS) software server is scheduled for the 2nd September.
- We are planning stop access to the cream CEs - although possibly leaving them available to ALICE for some time. No date has yet been specified for this.
Listing by category:
- Databases:
- Switch LFC/FTS/3D to new Database Infrastructure.
- Castor:
- 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. (Requires resolution of blocking issue).
- Fabric
- We are phasing out the use of the software server used by the small VOs.
- 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 during 2014.
| Entries in GOC DB starting between the 6th and 13th August 2014.
|
| Open GGUS Tickets (Snapshot during morning of meeting)
|
| GGUS ID |
Level |
Urgency |
State |
Creation |
Last Update |
VO |
Subject
|
| 106324
|
Red
|
Urgent
|
In Progress
|
2014-06-18
|
2014-08-07
|
CMS
|
pilots losing network connections at T1_UK_RAL
|
| 105405
|
Red
|
Urgent
|
On Hold
|
2014-05-14
|
2014-07-29
|
|
please check your Vidyo router firewall configuration
|
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
|
| 06/08/14 |
100 |
100 |
100 |
98.7 |
100 |
97 |
99 |
Problem triggered by rebalancing (started late evening)
|
| 07/08/14 |
100 |
100 |
100 |
87.4 |
100 |
99 |
99 |
Problem triggered by rebalancing (continued)
|
| 08/08/14 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
| 09/08/14 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
| 10/08/14 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
| 11/08/14 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
| 12/08/14 |
100 |
100 |
98.9 |
100 |
100 |
100 |
100 |
Single test failure (SRMServer restart on one of Atlas SRMs.)
|
