Tier1 Operations Report 2019-04-01

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RAL Tier1 Operations Report for 1st April 2019

Review of Issues during the week 26th March 2019 to the 1st April 2019.
  • This years CPU capacity entered production on 27th March. V11 CPU has been retired.
  • gdss733 had a double disk failure in Castor. Was out of production from 27th - 29th March.
  • CMS CPU efficiency has been poor all last week (25%-40%). Efficiency started dropping around the 20th March.
  • We fixed a problem that prevent LSST jobs from running (HTCondor had not been updated with the new VOMS server).
Current operational status and issues
Resolved Castor Disk Server Issues
Machine VO DiskPool dxtx Comments
gdss733 LHCb lcbhDsy d1t0 -
Ongoing Castor Disk Server Issues
Machine VO DiskPool dxtx Comments
Limits on concurrent batch system jobs.
  • ALICE - 1000
Notable Changes made since the last meeting.
  • NTR
Entries in GOC DB starting since the last report.
Service ID Scheduled? Outage/At Risk Start End Duration Reason
- - - - - - - -
Declared in the GOC DB
Service ID Scheduled? Outage/At Risk Start End Duration Reason
- - - - - - - -
  • No ongoing downtime
Advanced warning for other interventions
The following items are being discussed and are still to be formally scheduled and announced.

Listing by category:

  • DNS servers will be rolled out within the Tier1 network.

GGUS Tickets (Snapshot taken during morning of the meeting).

Request id Affected vo Status Priority Date of creation Last update Type of problem Subject Scope Solution
140521 ops in progress less urgent 01/04/2019 01/04/2019 Operations [Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer@gridftp.echo.stfc.ac.uk EGI
140511 cms in progress urgent 01/04/2019 01/04/2019 CMS_Facilities T1_UK_RAL SAM job run out of date WLCG
140447 dteam in progress less urgent 27/03/2019 02/04/2019 Network problem packet loss outbound from RAL-LCG2 over IPv6 EGI
140220 mice in progress less urgent 15/03/2019 25/03/2019 Other mice LFC to DFC transition EGI
139672 other in progress urgent 13/02/2019 18/03/2019 Middleware No LIGO pilots running at RAL EGI
138665 mice on hold urgent 04/12/2018 30/01/2019 Middleware Problem accessing LFC at RAL EGI
GGUS Tickets Closed Last week
Request id Affected vo Status Priority Date of creation Last update Type of problem Subject Scope Solution
140493 atlas solved less urgent 29/03/2019 29/03/2019 File Transfer UK RAL-LCG2 MCTAPE: transfer error with" Connection timed out," WLCG Hi xin wang,

This looks more like a problem with the source site, LRZ-LMU_DATADISK. The error message refers to the source URL at httpg://lcg-lrz-srm.grid.lrz.de:8443/srm/managerv2. Also, if I try to download from the source path, it gets stuck:

gfal-copy srm://lcg-lrz-srm.grid.lrz.de:8443/srm/managerv2?SFN=/pnfs/lrz-muenchen.de/data/atlas/dq2/atlasdatadisk/rucio/mc16_13TeV/35/cb/HITS.17137527._002530.pool.root.1 .

Can you assign a new ticket for LRZ-LMU?

I hope it's OK for me to mark this ticket "solved". Please reopen if I was mistaken.

Thanks, Tim.

140467 cms solved urgent 28/03/2019 01/04/2019 CMS_Data Transfers Stuck file at RAL WLCG Stuck file had missing stripes and a zeroth stripe with zero size. This was deleted by hand and the errors stopped appearing.
140443 none verified top priority 27/03/2019 01/04/2019 Other This TEST ALARM has been raised for testing GGUS alarm work flow after a new GGUS release. WLCG Alarms raised (and acknowledged) internally at RAL

Closing this ticket.

140400 ops verified less urgent 26/03/2019 29/03/2019 Operations [Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer@gridftp.echo.stfc.ac.uk EGI Tests are now being run with the correct certificate.
140385 cms solved less urgent 25/03/2019 29/03/2019 CMS_Data Transfers Data Transfer problems at T1_UK_RAL WLCG The datasets listed had each one file with a problem. Two had zero size and were deleted from tape. Another seven were deleted from tape and invalidated by the data transfer team. The list of stuck routing files is now empty apart from a file from a T2 site currently experiencing problems.
140177 cms closed urgent 13/03/2019 01/04/2019 CMS_Data Transfers RAL FTS - Transfers failing from T1_US_FNAL_Disk to some sites WLCG IPv6 was registered, although not fully enabled at FNAL. RAL had IPv6 fully enabled, so expected to transfer via that connection, however it was timing out and not falling back to IPv4. FNAL removed the IPv6 address, and since then the link has been green.
139723 atlas solved less urgent 15/02/2019 27/03/2019 Data Management - generic permissions on scratchdisk EGI Hi Folks,

This appears to have become a somewhat convoluted ticket which as far as I can tell has simply become a conversation thread.

Assuming that the original issue has been resolved (further workarounds/enhancements not withstanding), I'm marking this as solved.


Confused of Tier-1! (Darren)

138033 atlas solved urgent 01/11/2018 26/03/2019 Other singularity jobs failing at RAL EGI As the new batch containers have been fully rolled out and appear to have been working since the 18/03/19 I'm going to call this one as solved.

Availability Report

Day Atlas Atlas-Echo CMS LHCB Alice OPS Comments
2019-03-19 100 100 100 100 100 93
2019-03-20 100 100 100 100 100 100
2019-03-21 100 100 100 100 100 100
2019-03-22 100 100 100 100 100 100
2019-03-23 81 81 100 100 100 100
2019-03-24 100 100 100 100 100 100
2019-03-25 100 100 100 100 100 100
2019-03-26 100 100 100 100 100 100
Hammercloud Test Report
Target Availability for each site is 97.0% Red <90% Orange <97%
Day Atlas HC CMS HC Comment
2019-03-19 96 99
2019-03-20 100 99
2019-03-21 100 N/A
2019-03-22 100 N/A
2019-03-23 100 100
2019-03-24 100 100
2019-03-25 100 99
2019-03-26 100 99

Key: Atlas HC = Atlas HammerCloud (Queue RAL-LCG2_UCORE, Template 841); CMS HC = CMS HammerCloud

Notes from Meeting.