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Andrew Bohdan Hanushevsky (SLAC National Accelerator Laboratory (US))9/16/26, 2:00 PM
This talk rounds up new features added to XRootD since the last workshop and delves into security fixes.
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Guilherme Amadio (CERN)9/16/26, 2:30 PM
In this contribution, we will present our work to add native support for Prometheus metrics in XRootD. We will discuss the new XrdMetrics module both from the developer and user points of view, how to configure and use the new system, and its current development status.
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Guilherme Amadio (CERN)9/16/26, 3:30 PM
In this contribution, we will discuss a new XRootD detailed monitoring collector (i.e. UDP packet parser/correlator) currently under development. We will discuss its features, architecture, configuration, and deployment modes to support WLCG monitoring requirements in the future.
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Panos Paparrigopoulos (CERN)9/16/26, 4:00 PM
This talk gives an update on the state of a common transfer monitoring pipeline for XRootD transfers in WLCG, covering both native XRootD servers and xroot traffic over dCache. The collector is now validated and ready for large-scale deployment, and we present what deploying it at other sites involves and how we plan to drive adoption ahead of DC27.
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Karanjot Singh (CERN)9/16/26, 4:20 PM
This talk presents improvements to the OSG XRootD monitoring collector: fixing a critical t-stream parsing bug that fabricated bogus file-close records, adding topology and SciTags resolution, new Prometheus metrics, and expanded configurability for multi-VO deployments. We conclude with a validation of the collector against MonaLisa at CERN, confirming the fixes and establishing a...
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Gustavo Mattos Lopes9/16/26, 4:40 PM
This CERN Openlab Summer Student project aimed to benchmark and compare different storage solutions used or considered for CERN's computing infrastructure. The main goal was to evaluate a Pure Storage appliance, HDD/SSD baselines, and CERN's production storage systems, including CephFS, XRootD and EOS. The benchmarking methodology relied on [Flexible I/O (FIO)][1] scripts designed to...
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Fabio Andrijauskas (Univ. of California San Diego (US))9/16/26, 5:00 PM
Contemporary research relies heavily on computational resources and storage, with data sharing serving as a critical element. Data access remains a central challenge. The Open Science Data Federation (OSDF) project aims to establish a global scientific data distribution network by leveraging the Pelican Platform and the National Research Platform (NRP). OSDF is based on the XRootD and Pelican...
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Sarah Yang9/16/26, 5:20 PM
We report here our experience of using AI to make change/improvement to open source software like XRootD. We choose three real world tasks to see if AI can have a comprehensive understanding of both XRootD software stack, other software used by Xrootd (e.g. Fuse, Scitoken), and our intention. Theses tasks are: creating a separate version of xrdadler32 that does not depend on any XRootD...
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Matevz Tadel (Univ. of California San Diego (US))9/17/26, 8:30 AM
Discuss status and possible extensions of XCache, in particular related to:
- analysis facilities
- resource monitor
- cache control and cache consistency
- the Pelican projectRequired time: 30 min
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Raphael Kleinemuehl9/17/26, 9:00 AM
Several sites supporting WLCG in Germany operate XCache services. Within the recently initiated FUSE project we prepare standardized deployment procedures which match the constraints and requirements of our sites. We are working on light-weight containers and well-tested setup examples, including documentation and a dedicated monitoring service. In addition we are preparing dedicated...
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Lorena Lobato Pardavila (Fermi National Accelerator Lab. (US))9/17/26, 10:00 AM
This presentation provides an operational overview of the XRootD services hosted at Fermilab, including the USCMS AAA regional and FNAL site redirectors, as well as the StashCache redirector supporting the OSG Data Federation. We summarize the current deployment architecture, service monitoring, and operational practices.
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Rahul Chauhan (University of Wisconsin (US))9/17/26, 10:20 AM
OpenVerify is an XRootD OFS plugin that probes candidate replicas before the client is redirected. It can locate via CMS Rucio with cmsd fallback, quarantine unhealthy sites, and export Prometheus metrics to reduce federated open failures on missing or broken files.
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LI Haibo lihaibo, Xuantong Zhang (Institute of High Enegry Physics, Chinese Academy of Sciences (CN))9/17/26, 10:40 AM
To meet the growing and evolving needs of high-energy physics users in interactive data analysis and processing, an all-in-one platform, the Interactive Analysis Workbench (INK) is proposed and developed by IHEP CAS, as a secure and reliable bridge between users and computing clusters..
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To bridge private cluster storage systems and interactive web accessing, we choose the XRootD framework... -
Dr Ulrich Schwickerath (CERN)9/17/26, 11:00 AM
Going back in time by about 30 years or more, the CERNLIB library was used by a large number of experiments and collaborations, across a huge number of platforms and architectures. Written (mostly) in C and Fortran, it contained a large number of highly optimized tools, among them the "Physics Analysis Workstation (PAW)", a popular tool to visualize scientific data at the time, and the...
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Rahul Chauhan (University of Wisconsin (US))9/17/26, 1:00 PM
xrd-readgen generates controlled, measured XRootD remote-read traffic against federation redirectors and site endpoints for WLCG data challenges. This talk walks through its interfaces, internal design, and client-side metrics, and invites comments and suggestions to improve the tool.
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Horst Severini (University of Oklahoma (US))9/17/26, 1:20 PM
Update on OU_OSCER_ATLAS backend storage migration from XRootD to CephFS
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Andrew Bohdan Hanushevsky (SLAC National Accelerator Laboratory (US))9/17/26, 1:40 PM
This talk describes the new real-time checksum capability in XRootD.
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Dmytro Kovalskyi (Massachusetts Inst. of Technology (US))9/17/26, 2:00 PM
High-energy physics analyses repeatedly process the same data as physicists refine algorithms and test new ideas. When the data are read from remote storage, each iteration incurs network latency and depends on shared-storage throughput, which can vary substantially under load. We present uCache (xrd-ucache), a transparent cache implemented as an XRootD client plugin that requires neither...
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Jyothish Thomas (STFC)9/17/26, 3:00 PM
Given the rising increase in costs for procuring fast storage, this talk aims to cover some basic XRootD Architectures to handle different use cases and storage specifications, as well as a brief overview on the cost/benefit of each approach.
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Brian Paul Bockelman (University of Wisconsin (US))9/17/26, 3:20 PM
For the Pelican Platform (https://pelicanplatform.org/), XRootD is used as the core of the data movement: whether part of the origin or cache service, when data is moved via HTTPS, XrdHttp can be found.
Doing the integration between Pelican and XRootD has required multiple new plugins into the core. They include:
- OSS storage: connecting XRootD to new storage types.
- XrdCl: providing...
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Cedric Caffy (CERN)9/18/26, 9:00 AM
This presentation covers twelve months of evolution in the XrdHttp and XrdHttpTPC functionalities of XRootD. These include a new CORS plugin developed to address the browser-based data analysis use case of the LHCb experiment, the WLCG HTTP-TPC data integrity check initiative and how it has been implemented, and the story behind a surprising and sudden memory increase that led to Out-of-Memory...
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Fabrizio Furano (CERN)9/18/26, 9:20 AM
Recent contributions to the XRootD client component have opened the possibility of using it as a multiprotocol client, supporting basic features of HTTP and S3.
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This talk introduces the ongoing work to enable the ROOT framework to access HTTP and S3 servers through this XrdCl component, with the medium term goal to provide a working alternative to the Davix library.
We discuss the minimal... -
Luis Antonio Obis Aparicio (CERN)9/18/26, 9:40 AM
GFAL command-line tools provide a convenient, uniform interface to heterogeneous storage. For protocols already supported by XRootD, however, much of the underlying functionality exists natively but is spread across xrdfs, xrdcp, XrdCl, XrdClHttp, and the Python bindings.
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This presentation describes ongoing work toward a coherent native XRootD interface for common GFAL workflows. An... -
Andreas Joachim Peters (CERN)9/18/26, 10:00 AM
I will present the design of two experimental authentication plugins:
- OAUTH2 for https:// and roots:// in XRootD
- SSH authentication for roots:// in XRootD
and can optionally introduce few other R&D projects/ideas:
- XrdHttpKrb5 Kerberos Authentication support in XrdHttp
- llhttp high-performance HTTP...
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Dimitrios Christidis (CERN)
ATLAS has relied on FTS to transfer millions of files across the Grid every single day. When a preproduction FTS4 instance was made available to ATLAS, we enthusiastically assisted with its testing. This talk will focus on our testing methodology, observations, and conclusions.
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Christos Emmanouil (CERN)
An update on CMS Data Management, focused on FTS, covering updates since the last workshop and CMS's experience testing FTS4 so far.
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Katy Ellis (Science and Technology Facilities Council STFC (GB))
The WLCG Data Challenge series drives change and performance improvements in our data movement systems, required in time for the start of the High-Luminosity LHC (HL-LHC). Following challenges in 2021 and 2024, this talk describes the planning in progress for the challenge in 2027, expected to take place near the start of the year. The four LHC experiments plan to take part, alongside others...
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Wei Yang (SLAC National Accelerator Laboratory (US))
Rubin/LSST is using the Rucio/FTS/Xrootd/dCache ecosystem for data transfer and distribution between their Fr/UK/US data facilities and independent data access centers around the world. Here we will outline the integration of Rubin's native data management system Butler and the Rucio ecosystem. We will focus on Rubin's specific challenge of efficiently transferring large number of small files,...
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Xuantong Zhang (Institute of High Enegry Physics, Chinese Academy of Sciences (CN))
IHEP operates FTS3 as a key data transfer service for several high-energy physics experiments, including JUNO, HERD, and other related projects. This talk will report the current status of the FTS3 deployment at IHEP and summarize its use in production data transfer workflows.
We will share operational experience from deployment, maintenance, and troubleshooting, including issues observed...
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Steven Murray (CERN)
The File Transfer System (FTS) is a critical component of the WLCG data-transfer infrastructure, scheduling and executing file transfers between storage endpoints worldwide. This presentation provides a high-level overview of the development and deployment of FTS4, the next major version of FTS, during the past year.
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Christophe Haen (CERN)
I promise I'll update the abstract with a better title/description :-)
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James William Walder (Science and Technology Facilities Council STFC (GB))
SRCNet provides the international data movement infrastructure for the SKA Regional Centre (SRC) network, connecting geographically distributed facilities that will store, distribute, and process SKA science data. As SKAO approaches operations, validating reliable, high-throughput, and scalable data transfer services becomes a critical challenge.
This talk presents the current status of...
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Lorena Lobato Pardavila (Fermi National Accelerator Lab. (US))
We present the operational evolution of the Fermilab FTS3 for non-CMS experiments, highlighting the modernization of its Kubernetes deployment, adoption of GitOps-based automation, and migration to a more maintainable infrastructure. We discuss the introduction of elastic scaling, improved monitoring, and lessons learned from operating FTS3 in production to enhance the reliability and...
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Dimitrios Christidis (CERN)
The vast majority of scientific collaborations employing Rucio for their data-management needs choose FTS to orchestrate their site-to-site transfers. The two projects have collaborated closely over the years. This talk aims to cover a variety of topics, such as the migration to FTS4, the scaling for the Data Challenge 2027, and OAuth tokens. It will also mention Rucio’s current plans for...
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Diego Davila Foyo (Univ. of California San Diego (US))
We will present the current status of the Rucio/SENSE project and the plan to be integrated into CMS production.
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Rose Cooper
General overview of the current status of the FTS service being run at RAL and plans for it moving forward.
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Diego Davila Foyo (Univ. of California San Diego (US))
A timeline, from the USCMS perspective, of the mini-challenges starting from the last Data Challenge in 2024 and the forecast for DC27
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Nikita Avdeev (INFN Torino)
The MADDEN project aims to enable seamless data access and sharing across multiple Research Infrastructures (RIs) by developing a Multi-RI Data Lake based on Rucio. As part of the project, production and test Rucio servers were deployed for the Einstein Telescope, with three Rucio Storage Elements (RSEs) located at INFN Torino, UCLouvain, and PIC. The RSEs at INFN Torino and UCLouvain are...
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