RAL Tier1 Operations Report for 14th March 2018
Review of Issues during the week 7th to 14th March 2018
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- The Castor intervention scheduled for last Thursday (1st March) was cancelled owing to staff availability in the poor weather. (It was to apply Oracle patches to the database systems behind Castor). It is being re-scheduled possibly towards the end of March.
- As planned the Echo gateways were dual stacked – so providing IPv6 access – last Tuesday (27th Feb). This change itself went well – however, it revealed problems with transfers to/from Echo via our FTS service. One issue was identified – the load balancers in front of the FTS system were not dual stacked. This was fixed quickly but the problem persists. Some VOs are making use of other FTS servers as a workaround. (LHCb seem to be the only one using our FTS server significantly at the moment).
- Following aproblem with two (of the three) connections that make up the OPN link last week errors were seen on one of those links along with some packet loss. The problem was at the far end of the link and was fixed some time towards the end of yesterday (Tuesday) by Janet.
Current operational status and issues
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- The problems with data flows through the site firewall being restricted is still present. New firewall kit has be purchased and delivered, awaiting deployment.
- After the Echo Gateway Dual Stack upgrade RAL FTS is still broken. Currently CERN FTS is being used as a stop-gap solution.
Resolved Castor Disk Server Issues
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- gdss618 (GenTape d0t1) failed late Monday morning. A faulty disk drive was replaced.
Ongoing Castor Disk Server Issues
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Limits on concurrent batch system jobs.
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Notable Changes made since the last meeting.
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- Nine disk servers from the Dell 2015 batch were taken out of production for short periods yesterday (Tuesday 6th March) for BIOS update and to alter fan speeds to improve cooling. These servers were located in D0T1 areas (tape buffers).
Entries in GOC DB starting since the last report.
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Service
|
Scheduled?
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Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
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All Castor
|
SCHEDULED
|
OUTAGE
|
27/03/2018 10:00
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27/03/2018 16:00
|
6 hours
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Outage to Castor Storage System while back-end databases are patched. During the intervention both Castor disk and tape will be unavailable.
|
Advanced warning for other interventions
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The following items are being discussed and are still to be formally scheduled and announced.
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Listing by category:
- Echo
- Applying minor CEPH update to fix the "backfill" bug. Increase number of placement groups and add more capacity.
- Castor:
- Update systems to use SL7 and configured by Quattor/Aquilon. (Tape servers done)
- Move to generic Castor headnodes.
- Networking
- Extend the number of services on the production network with IPv6 dual stack. (Done for Perfsonar, FTS3, all squids and the CVMFS Stratum-1 servers).
- Replacement (upgrade) of RAL firewall.
- Internal
- DNS servers will be rolled out within the Tier1 network.
- Infrastructure
- Testing of power distribution boards in the R89 machine room is being scheduled for some time late July / Early August. The effect of this on our services is being discussed.
Open GGUS Tickets (Snapshot during morning of meeting)
|
Request id
|
Affected vo
|
Status
|
Priority
|
Date of creation
|
Last update
|
Type of problem
|
Subject
|
Scope
|
117683
|
none
|
on hold
|
less urgent
|
18/11/2015
|
09/03/2018
|
Information System
|
CASTOR at RAL not publishing GLUE 2
|
EGI
|
124876
|
ops
|
on hold
|
less urgent
|
07/11/2016
|
13/11/2017
|
Operations
|
[Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer-ops@gridftp.echo.stfc.ac.uk
|
EGI
|
127597
|
cms
|
on hold
|
urgent
|
07/04/2017
|
29/01/2018
|
File Transfer
|
Check networking and xrootd RAL-CERN performance
|
EGI
|
132589
|
lhcb
|
in progress
|
very urgent
|
21/12/2017
|
12/03/2018
|
Local Batch System
|
Killed pilots at RAL
|
WLCG
|
133619
|
cms
|
waiting for reply
|
top priority
|
21/02/2018
|
12/03/2018
|
CMS_Central Workflows
|
T1_UK_RAL Unmerged files missing
|
WLCG
|
133717
|
cms
|
in progress
|
very urgent
|
27/02/2018
|
07/03/2018
|
CMS_Data Transfers
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RAL FTS3 Service: Significant Drop in Transfer Efficiency
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WLCG
|
133764
|
snoplus.snolab.ca
|
in progress
|
very urgent
|
01/03/2018
|
08/03/2018
|
Information System
|
BDII missing SFU information
|
EGI
|
133992
|
atlas
|
in progress
|
less urgent
|
12/03/2018
|
14/03/2018
|
File Transfer
|
RAL-LCG2-ECHO: No such file or directory
|
EGI
|
GGUS Tickets Closed Last week
|
Request id
|
Affected vo
|
Status
|
Priority
|
Date of creation
|
Last update
|
Type of problem
|
Subject
|
Scope
|
133719
|
atlas
|
solved
|
urgent
|
27/02/2018
|
14/03/2018
|
File Transfer
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Transfers to RAL-LCG2-ECHO failing
|
WLCG
|
133752
|
atlas
|
solved
|
very urgent
|
01/03/2018
|
14/03/2018
|
File Transfer
|
RAL FTS service appears broken
|
WLCG
|
133842
|
snoplus.snolab.ca
|
solved
|
less urgent
|
05/03/2018
|
08/03/2018
|
Other
|
File Stuck on RAL
|
EGI
|
133997
|
lhcb
|
verified
|
urgent
|
13/03/2018
|
14/03/2018
|
File Access
|
Bad data was encountered
|
WLCG
|
Day
|
ALICE
|
ATLAS
|
ATLAS-ECHO
|
CMS
|
LHCb
|
OPS
|
Comment
|
2018-03-07
|
100
|
100
|
100
|
99
|
100
|
100
|
|
2018-03-08
|
100
|
100
|
100
|
98
|
100
|
100
|
|
2018-03-09
|
100
|
100
|
100
|
98
|
100
|
100
|
|
2018-03-10
|
100
|
100
|
100
|
97
|
100
|
100
|
|
2018-03-11
|
100
|
100
|
100
|
100
|
100
|
100
|
|
2018-03-12
|
100
|
100
|
100
|
100
|
100
|
100
|
|
2018-03-13
|
100
|
98
|
100
|
100
|
100
|
100
|
|
Key: Atlas HC = Atlas HammerCloud (Queue RAL-LCG2_UCORE, Template 841); CMS HC = CMS HammerCloud
Day |
Atlas HC |
CMS HC |
Comment
|
2018/03/07 |
96 |
100 |
|
2018/03/08 |
90 |
100 |
|
2018/03/09 |
96 |
99 |
|
2018/03/10 |
96 |
100 |
|
2018/03/11 |
86 |
99 |
|
2018/03/12 |
86 |
100 |
|
2018/04/13 |
98 |
100 |
|