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Andreas Joachim Peters (CERN)09/03/2026, 14:00
Abstract — EOS Workshop Introduction
We open the workshop with a short practical overview: how the days are structured, the timetable, session flow, technical details, and where to find coffee breaks and the workshop dinner. We also briefly introduce the people in the room before starting, to make it easy for participants to meet each other and have useful discussions.
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Elvin Alin Sindrilaru (CERN)09/03/2026, 14:10
This presentation will go through the main developments included in the EOS code base in the past year.
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Guilherme Amadio (CERN)09/03/2026, 14:30
In this talk we will discuss the new features in XRootD 6.0.
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Andreas Joachim Peters (CERN)09/03/2026, 14:50
CERN-NFS v4.0 is a prototype NFS server implemented in modern C++ that currently runs as a standalone service on a local filesystem backend. The server is built around a handle-first VFS abstraction, enabling filesystem backends to be cleanly plugged in without impacting core NFS protocol logic. While the current implementation targets POSIX and in-memory filesystems, the architecture is...
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Gianmaria Del Monte (CERN)09/03/2026, 15:10
This presentation introduces a new S3 interface for EOS developed as a lightweight plugin for VersityGW. This "thin layer" provides an efficient bridge between the S3 protocol and the EOS backend by natively translating S3 requests into gRPC and HTTP calls.
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Cedric Caffy (CERN)09/03/2026, 15:50
- WLCG data integrity check
- Enable web-browser access to an EOS instance
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Andreas Joachim Peters (CERN)09/03/2026, 16:10
EOS File Notification adds a customizable way to the EOS Workflow Engine to send file change notifications to other systems. It detects changes in watched folders and sends out alerts using different methods, like HTTP(S), gRPC, ActiveMQ, or Redis. Each alert uses a consistent JSON message that contains key file info, such as metadata, folder details, checksums, times, and user access info....
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Elvin Alin Sindrilaru (CERN)09/03/2026, 16:25
This presentation will focus on the recent improvements done to the recycle bin implementation. This will cover the internal changes with respect to recycle bin clean-up, the addition of recycle project concept and the use of the GRPC interface.
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Guilherme Amadio (CERN)09/03/2026, 16:40
In this contribution, we will discuss recent developments in how EOS quotas are tracked, some features which are still missing, and our future plans for further improvements.
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Gianmaria Del Monte (CERN)10/03/2026, 09:00
This presentation introduces Alternative Checksums in EOS 5.4.0, a feature that enables the storage of multiple hash types for a single file alongside the default system checksum. By allowing for various algorithms, such as MD5 or SHA-256, on a per-directory basis, EOS provides the necessary flexibility to meet diverse experiment requirements.
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David Smith (CERN)10/03/2026, 09:20
A selection of changes in XRootD with impact on EOS is presented. This
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covers bug fixes, associated refactoring and some new
features. In particular the file-clone feature in XRootD release 6 and ongoing development in EOS that makes use of the feature is discussed. -
Andreas Joachim Peters (CERN)10/03/2026, 09:40
The EOS rclone tool is an EOS-integrated file replication and synchronization utility that provides one-way copy and bi-directional sync operations between directories within EOS or across EOS-accessible endpoints. It supports dry-run execution, selective updates, verbosity control, and optional inclusion of EOS-specific semantics such as atomic files, versioned files, and hidden entries....
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Luis Antonio Obis Aparicio (CERN)10/03/2026, 10:00
I/O shaping in EOS is a cluster-wide mechanism that helps share storage bandwidth fairly across a whole instance. It continuously collects near-real-time I/O activity from all nodes and builds a global picture of who is reading and writing - grouped by user, group, or application. Using this global view, EOS can automatically apply scheduling and priority rules that decide how the...
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Hans Holmberg (Western Digital Research)10/03/2026, 11:00
[Recent developments in XFS][1] have introduced native support for zoned storage devices such as Shingled Magnetic Recording (SMR) drives, offering a robust and higher‑performance alternative to BTRFS for this class of hardware. With Zoned XFS EOS can now efficiently leverage the additional 20–25% storage capacity provided by SMR HDDs.
This presentation will give an overview of the...
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Ed Strong10/03/2026, 11:20
As the global data sphere expands, the storage industry faces a dual challenge: satisfying the insatiable demand for capacity while drastically reducing the power and environmental footprint of data centers. This presentation explores the intersection of areal density leadership and next-generation "regenerative" drive technologies as the primary levers for solving these challenges and...
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Ruhi Choudhury10/03/2026, 11:40
This project aims to evaluate next-generation, high-density flash-based storage technologies through a strategic CERN openlab – Pure Storage collaboration. By combining CERN’s exascale operational expertise with Pure Storage’s high-efficiency DirectFlash platform, the initiative will assess performance, scalability, energy efficiency, cost, and reliability. The overall goal is to determine...
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Octavian-Mihai Matei (CERN)10/03/2026, 14:00
This presentation introduces Apollon and Hermes, two complementary tools that automate the complete disk lifecycle. Apollon is a centralized gRPC service that manages automated draining, intelligent repair of failed drains through dynamically-loaded plugin strategies, and systematic leftover file handling. Hermes runs on each storage node, interfacing with repair catalogue systems to detect...
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Martin Vala (Pavol Jozef Safarik University (SK))10/03/2026, 14:20
This contribution outlines the use of Ansible to automate the deployment and lifecycle management of EOS clusters. By utilizing declarative playbooks, we orchestrate the setup of MGM and FST components while ensuring consistent configuration of the QuarkDB metadata backend and XRootD framework. This automated approach eliminates manual errors, simplifies complex version upgrades, and enables...
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Andreas Joachim Peters (CERN)10/03/2026, 14:35
The CERN Disk Benchmark Tool benchmarks Linux block devices and filesystems by measuring sustained large-block write speed and in-place file rewrite performance at a chosen mount point. It supports parallel I/O and captures device statistics with iostat. The tool generates throughput-versus-usage plots and produces a self-contained PDF report, including configuration metadata for reproducible analysis.
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Octavian-Mihai Matei (CERN)10/03/2026, 14:50
EOS-Alarms is managed by a multitude of subsystems. This talk will focus on Winston, which is an alarm management system that automates EOS health monitoring by continuously analyzing core subsystems through parsing JSON output from EOS commands.
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Winston understands EOS-specific operational patterns, distinguishing spare scheduling groups from active ones, correlating drain status with... -
Dr Maria Arsuaga Rios (CERN)10/03/2026, 15:10
A brief, transparent update on EOS ChatBot, an AI assistant prototype integrated into Mattermost and the EOS Community forum. This session covers what EOS ChatBot is designed for, why a full evaluation is premature, what we are measuring, and a concrete plan leading to a data-driven decision in May. Includes a practical walkthrough of how to use it today.
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Dr Jorge Luis Gomes (Instituto Nacional De Pesquisas Espaciais - INPE (BR)), Mr Wanderley Oliveira Mendes (Instituto Nacional De Pesquisas Espaciais - INPE (BR))11/03/2026, 09:00
The Intelligent Early Warning System for Climate Extremes (SIPEC/SisMOM), led by the National Institute for Space Research (INPE, Brazil), integrates satellite and in-situ sensor data to support early prediction of climate extremes using numerical models and machine learning techniques. To enable distributed access to large and heterogeneous datasets produced by multiple institutions, INPE is...
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Pablo Medina Ramos11/03/2026, 09:20
CERNBox, CERN’s cloud collaboration platform, currently serves more than 27,000 users worldwide and manages over 4.1 billion files across multiple petabytes of data. Behind this service, EOS HPM (EOS Home-Project-Media) provides a large-scale, multipetabyte storage infrastructure that enables reliable access to both personal and project spaces.
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This presentation reviews the current... -
Michael Davis (CERN)11/03/2026, 09:40
The CERN Tape Archive (CTA) manages the archival and retrieval of more than one Exabyte of physics data produced by the many experiments at CERN. CTA has proved adequate to the operational demands of LHC Run-3. Preparations have already started for Run-4 and the High-Luminosity LHC era, with significant performance, scalability, and operational improvements foreseen. This contribution reports...
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Armin Burger11/03/2026, 10:50
The Joint Research Centre (JRC) of the European Commission is running the Big Data Analytics Platform (BDAP) to enable the JRC projects and scientists to store, process, and analyze a wide range and large amount of data, and to share and disseminate data products.
EOS is the main system of BDAP for storing the scientific data. The BDAP services are actively used by more than 100 JRC...
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Yujun Wu (Fermi National Accelerator Lab. (US))11/03/2026, 11:10
The Fermilab CMS LPC center has operated an EOS instance since initial testing began in June 2012, transitioning to production storage in 2013 with an initial capacity of 600 TB. Today, the system provides approximately 16 PB of storage to support the 4,500-core LPC user analysis cluster, which serves several hundred active CMS users at any given time.
In this talk, we will provide an...
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Luca Mascetti (CERN)11/03/2026, 11:30
This work provides an overview of EOS operations at CERN, highlighting its critical role in supporting large-scale physics data processing and storage. EOS is a high-performance distributed storage system engineered to manage the massive volumes of scientific data produced by CERN experiments. This presentation highlight recent operational achievements, and strategic objectives for the last...
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Steve Moulton (Oak Ridge National Laboratory - (US))11/03/2026, 11:50
This talk will present the current EOS storage architecture and
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current EOS issues for the ALICE-USA T2 sites at Oak Ridge National Laboratory and Lawrence Berkeley National Laboratory. -
Dr Yujiang BI (Institute of High Energy Physics, Chinese Academy of Sciences)11/03/2026, 12:10
I'll give a brief overview of EOS status at IHEP.
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Sergiu Weisz (National University of Science and Technology POLITEHNICA Bucharest (RO))11/03/2026, 14:00
Modern Low Earth Orbit satellites increasingly support on-board data processing using GPUs and FPGAs, enabling multi-purpose use cases beyond simple data capture. However, orchestrating computational workloads across single or multi-node satellite systems requires an efficient shared storage solutions that can handle the constraints of space environments.
This contribution presents the...
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Martin Vala (Pavol Jozef Safarik University (SK))11/03/2026, 14:20
This contribution presents the NDMSPC (N-Dimensional Space) framework, designed for efficient management and analysis of high-dimensional datasets within the CERN EOS environment. We explore the integration of ROOT’s THnSparse for memory-efficient multi-dimensional histogramming alongside TTree for robust data storage. By leveraging EOS as the underlying storage layer, the framework achieves...
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Andreas Joachim Peters (CERN), Elvin Alin Sindrilaru (CERN)11/03/2026, 14:40
This presentation outlines the EOS development plan and roadmap toward EOS 6, detailing key architectural milestones, planned features, and strategic objectives that will shape the next major evolution of the system. It provides an overview of ongoing engineering efforts, highlights upcoming enhancements across scalability, performance, and interoperability, and discusses longer-term...
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