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virtual XRootD Workshop

14.–15. Dez. 2020
Europe/Berlin Zeitzone

Sitzung

Day 2

15.12.2020, 17:00

Präsentationsmaterialien

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  1. 6. XRootD Forwarding Mode Proxy with ROOT 6.20.02
    15.12.20, 17:00

    S. Atay describes an issue with Root’s TNetXNGFile compatibility. The problem seems to lie in URL compatibility/parsing between ROOT’s TNetXNGFile and XRootD caching server. It will be good to have some insight where this might be rising? ROOT or XRootD?

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  2. 8. Monitoring 1: Connectivity tracing/monitoring in distributed XRootD setups
    15.12.20, 17:10

    Max Fischer: With xrootd being used more dynamically/opportunistically (Caches, Cloud, ?) we can no longer rely on every point-to-point connection being possible. This is not always obvious, because it can be triggered by faulty network configuration, IPv6/IPv4 routing differences, internal xrootd redirection, authentication, etc.
    Andy: Agreed, that's a tough one given the distributed nature...

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  3. 10. Monitoring 2: Datalake monitoring
    15.12.20, 17:30

    We would like to have a mechanism to monitor the state of the XRootD-HTTP(s) dataservers, and based on this available monitoring data, run replication mechanisms.
    Additionally, we would like to discuss options to extend such a mechanism to dataservers that are not XRootD, but do speak xrootd-protocols

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  4. 17. Using xrootd with tape systems in particular HPSS. Replacement for SRM
    15.12.20, 17:50

    Andy: Well, good news is that xrootd should be fully integrated with HPSS. SRM replacement? CERN did that using xrootd's "prepare" plugin but it's a CERN thing that might not work for you. Another thing to discuss.

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  5. 16. Status and outlook OpenID connect integration with http / xroot protocols and third-party transfers
    15.12.20, 18:05
  6. 11. Cached Global Namespace
    15.12.20, 18:20

    What we want is an aggregation of different HTTP(s) storages into a global namespace. Parts of that namespace should also be cached for a configurable time to reduce the amount of lookup operations.

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  7. 12. QoS with XRootD
    15.12.20, 18:40

    It would be good to discuss XRootD's potential regarding QoS and GSI/FAIR needs

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  8. 7. Http(s) throughput with XRootD
    15.12.20, 19:05

    XRootd delivering files via HTTPs has significantly reduced throughput compared to HTTP

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  9. 13. Fusing XCache and Disk Cache on the fly
    15.12.20, 19:15

    Disk-Cache-On-The-Fly is a prototypical setup that has similarities to XCache with the direct cache access directive. While XCache with dca has many advantages over dcotf, there might be parts of the setup that could be useful in the main XRootD-codebase.

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  10. 15. Runaway resource allocation on xrootd data servers
    Marek Krzysztof Szuba (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)), Paul-Niklas Kramp (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)), Sören Fleischer (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI))
    15.12.20, 19:25

    Concurrent writes seem to put an XRootD-dataserver into an undefined state. Discussing why this happens and how to avoid this is the goal.

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  11. 14. [Optional] Voms credential forwarding
    15.12.20, 19:45

    A "how to configure" and a short explanation of VOMS credential forwarding would be interesting, if time permits.

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