Dmitry Litvintsev
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View article: dCache: The Storage System of Choice for Data-Intensive Applications
dCache: The Storage System of Choice for Data-Intensive Applications Open
The ever-increasing volumes of data produced by modern scientific facilities like EuXFEL and LHC put significant stress on data management infrastructure operated by laboratories and research centers. The challenges to be addressed span th…
View article: Fermilab's Transition to Token Authentication
Fermilab's Transition to Token Authentication Open
Fermilab is the first High Energy Physics institution to transition from X.509 user certificates to authentication tokens in production systems. All the experiments that Fermilab hosts are now using JSON Web Token (JWT) access tokens in th…
View article: Fermilab's Transition to Token Authentication
Fermilab's Transition to Token Authentication Open
Fermilab is the first High Energy Physics institution to transition from X.509 user certificates to authentication tokens in production systems. All the experiments that Fermilab hosts are now using JSON Web Token (JWT) access tokens in th…
View article: dCache project status and update
dCache project status and update Open
The dCache project delivers an open-source, massively scalable, distributed storage system deployed internationally to satisfy today’s scientists’ ever-demanding storage requirements. Its multifaceted approach supports different use cases …
View article: Fermilab’s Transition to Token Authentication
Fermilab’s Transition to Token Authentication Open
Fermilab is the first High Energy Physics institution to transition from X.509 user certificates to authentication tokens in production systems. All the experiments that Fermilab hosts are now using JSON Web Token (JWT) access tokens in th…
View article: Quota management in dCache or making a perfectly normal file system normal
Quota management in dCache or making a perfectly normal file system normal Open
dCache ( https://dcache.org ) is a highly scalable storage system providing location-independent access to data. The data are stored across multiple data servers as complete files presented to the end-user via a single-rooted namespace. Fr…
View article: Quota management in dCache or making a perfectly normal file system normal
Quota management in dCache or making a perfectly normal file system normal Open
dCache (https://dcache.org) is a highly scalable storage system providing location-independent access to data. The data are stored across multiple data servers as complete files presented to the end-user via a single-rooted namespace. From…
View article: Frontier: High Performance Database Access Using Standard Web Components in a Scalable Multi-Tier Architecture
Frontier: High Performance Database Access Using Standard Web Components in a Scalable Multi-Tier Architecture Open
A high performance system has been assembled using standard web components to deliver database information to a large number of broadly distributed clients. The CDF Experiment at Fermilab is establishing processing centers around the world…
View article: dCache: from Resilience to Quality of Service
dCache: from Resilience to Quality of Service Open
A major goal of future dCache development will be to allow users to define file Quality of Service (QoS) in a more flexible way than currently available. This will mean implementing what might be called a QoS rule engine responsible for re…
View article: XRootD Third Party Copy for the WLCG and HLLHC
XRootD Third Party Copy for the WLCG and HLLHC Open
A Third Party Copy (TPC) mechanism has existed in the pure XRootD storage environment for many years. However, using the XRootD TPC in the WLCG environment presents additional challenges due to the diversity of the storage systems involved…
View article: dCache -- Efficient Message Encoding For Inter-Service Communication
dCache -- Efficient Message Encoding For Inter-Service Communication Open
As a well established, large-scale distributed storage system, dCache is required to manage and serve huge amount of data for WLHC experiments and beyond. Based on a microservices-like architecture, dCache is built as a modular system dist…
View article: A distributed R&D storage platform implementing quality of service
A distributed R&D storage platform implementing quality of service Open
Optimization of computing resources, in particular storage, the costliest one, is a tremendous challenge for the High Luminosity LHC (HL-LHC) program. Several venues are being investigated to address the storage issues foreseen for HL-LHC.…
View article: HEPCloud, an Elastic Hybrid HEP Facility using an Intelligent Decision Support System
HEPCloud, an Elastic Hybrid HEP Facility using an Intelligent Decision Support System Open
HEPCloud is rapidly becoming the primary system for provisioning compute resources for all Fermilab-affiliated experiments. In order to reliably meet the peak demands of the next generation of High Energy Physics experiments, Fermilab must…
View article: dCache - storage for advanced scientific use cases and beyond
dCache - storage for advanced scientific use cases and beyond Open
The dCache project provides open source storage software deployed internationally to satisfy ever more demanding scientific storage requirements. Its multifaceted approach provides an integrated way of supporting different use cases with t…
View article: Storage events: distributed users, federation and beyond
Storage events: distributed users, federation and beyond Open
For federated storage to work well, some knowledge from each storage system must exist outside that system, regardless of the use case. This is needed to allow coordinated activity; e.g., executing analysis jobs on worker nodes with good a…
View article: dCache - joining the noWORM storage club
dCache - joining the noWORM storage club Open
For over a decade, dCache.ORG has provided robust software, called dCache, that is used at more than 80 universities and research institutes around the world, allowing these sites to provide reliable storage services for the WLCG experimen…
View article: Intelligently-automated facilities expansion with the HEPCloud Decision Engine
Intelligently-automated facilities expansion with the HEPCloud Decision Engine Open
The next generation of High Energy Physics experiments are expected to generate exabytes of data---two orders of magnitude greater than the current generation. In order to reliably meet peak demands, facilities must either plan to provisio…
View article: Data Resilience in the dCache Storage System
Data Resilience in the dCache Storage System Open
In this study we discuss design, implementation considerations, and performance of a new Resilience Service in the dCache storage system responsible for file availability and durability functionality.
View article: Fermilab HEPCloud Facility Decision Engine Design
Fermilab HEPCloud Facility Decision Engine Design Open
The Decision Engine is a critical component of the HEP Cloud Facility. It provides the functionality of resource scheduling for disparate resource providers, including those which may have a cost or a restricted allocation of cycles. Along…
View article: Unlocking data: federated identity with LSDMA and dCache
Unlocking data: federated identity with LSDMA and dCache Open
X.509, the dominant identity system from grid computing, has proved unpopular for many user communities. More popular alternatives generally assume the user is interacting via their web-browser. Such alternatives allow a user to authentica…
View article: dCache, Sync-and-Share for Big Data
dCache, Sync-and-Share for Big Data Open
The availability of cheap, easy-to-use sync-and-share cloud services has split the scientific storage world into the traditional big data management systems and the very attractive sync-and-share services. With the former, the location of …
View article: DATABASE USAGE AND PERFORMANCE FOR THE FERMILAB RUN II EXPERIMENTS
DATABASE USAGE AND PERFORMANCE FOR THE FERMILAB RUN II EXPERIMENTS Open
The Run II experiments at Fermilab, CDF and D0, have extensive database needs covering many areas of their online and offline operations. Delivering data to users and processing farms worldwide has represented major challenges to both expe…