WLCG Operations Coordination Minutes, September 17th 2015

Highlights

Agenda

• https://indico.cern.ch/event/393616/

Attendance

• local: Maria Dimou (Minutes), Andrea Sciaba (chair), Maarten Litmaath, Andrea Manzi, Marian Babik, David Cameron, Giuseppe Lo Presti EDIT AFTER THE MEETING
• remote: Alessandra Forti, Antonio Maria Perez Calero Yzquierdo, Christoph Wissing, Frederique Chollet, Felix Lee, Maite Barroso, Michael Ernst, Peter Gronbech, Renaud Vernet, Ult Tigerstedt, Rob Quick, Thomas Hartmann, Alessandro Cavalli, Vincenzo Spinoso, Pepe Flix, Alessandra Doria EDIT AFTER THE MEETING
• apologies: EDIT AFTER THE MEETING

Operations News

Middleware News

• Useful Links:
  • Baseline Versions
  • MW Issues
  • Storage Deployment

• Baselines:

• T0 and T1 services

Tier 0 News

Tier 1 Feedback

Tier 2 Feedback

Experiments Reports

ALICE

• high activity
  • reco, MC, analysis
  • final preparations for Quark Matter 2015, Sep 27 - Oct 3
• CERN
  • team ticket GGUS:116095 about expired CRLs on myproxy.cern.ch
    • IPv6 connectivity issue in the Wigner data center was fixed
  • Accessing CASTOR for reading or writing raw data files:
    • Various constructive meetings between ALICE experts and the CASTOR team.
    • Short- and longer-term ideas were discussed.
    • Reco jobs now download the raw data files instead of streaming them.
      • The effect should become visible when more data is ready for processing.
    • Further ideas involving EOS are being investigated.
    • DAQ and CASTOR experts also retraced how a particular file ended up lost.
    • Thanks for the good support!

ATLAS

CMS

LHCb

Ongoing Task Forces and Working Groups

gLExec Deployment TF

• NTR

HTTP Deployment TF

Information System Evolution

• WLCG Information System Use Cases document presented at the MB
• MB gave feedback to work on several areas that need further discussion and agreement within the TF:
  • Future Use Cases: use cases document describes the current interactions with the IS. The TF should now investigate what it is actually needed so that we can better understand how the IS could evolve.
  • Static vs Dynamic: MB would like to see summarised the types of information actually needed by the experiments. Probably a more elaborated version of what it is already summarised in this twiki under Types of Information and focus only in the future use cases.
  • "Indicative pledges" per site in REBUS: The TF requested the MB to include "indicative pledges" per site in REBUS. MB would like to understand why this information is needed and have a concrete proposal on how it will be collected.
  • Installed capacity: a better definition, and maybe also name, is needed for what it is called today "installed capacity". MB would also like to understand why this information is needed and also how it will be collected.
  • T3s and opportunistic resources: it would be good to understand how information is going to be collected from T3s and opportunistic resources.
• OSG, NDGF and EGI will present their plans to provide information about their resources in the future at the next TF meeting. GOCDB will also present the latest features.

IPv6 Validation and Deployment TF

Update on the status of IPv6 deployment in WLCG (from Bruno Hoeft)

Machine/Job Features

Middleware Readiness WG

Multicore Deployment

Network and Transfer Metrics WG

• OSG perfSONAR datastore entered production on 14th of Sept providing storage and interface for all perfSONAR results.
• Publishing of the perfSONAR results using pre-production (ITB) services was successfully established, working to resolve issue with some event types not being published, production still pending SLA.
• WLCG-wide meshes campaign with latency testing ramped up to 81 sonars caused some instabilities of the sonars with 4GB RAM, therefore we have decreased the number of tests performed and this has improved the situation.
• Final version of the perfSONAR 3.5 is planned to be released on 28th of September and will be auto-deployed to all WLCG instances. There were no issues found in the testbed, but we plan to update couple of production instances in advance to check if everything is fine.
• ESNet and OSG have started developments on the perfSONAR configuration interface - open source project motivated by the existing version developed for WLCG. There has been also interest from GEANT and ESNet to collaborate on an open source project based on the existing proximity service.
• Follow up meeting was held to discuss findings of the FTS performance study lead by Saul Youssef (Boston University), new optimization algorithm was proposed and discussed.
• Next WG meeting will be on 30th of Sept (https://indico.cern.ch/event/400643/)

RFC proxies

• NTR

Squid Monitoring and HTTP Proxy Discovery TFs

Action list

Creation date	Description	Responsible	Status	Comments
2015-06-04	Status of fix for Globus library (globus-gssapi-gsi-11.16-1) released in EPEL testing	Andrea Manzi	ONGOING	GGUS:114076 is now closed. However, host certificates need to be fixed for any service in WLCG that does not yet work OK with the new algorithm. Otherwise we will get hit early next year when the change finally comes in Globus 6.1. A broadcast message has been sent by EGI.
2015-09-03	Status of multi-core accounting	John Gordon	ONGOING	A presentation about the plans to provide multicore accounting data in the Accounting portal should be presented at the next Ops Coord meeting on October 1st https://indico.cern.ch/event/393617/ since this is a long standing issue

Specific actions for experiments

Specific actions for sites

AOB

-- MariaDimou - 2015-09-14