Abstract
Across the years, being the backbone of numerous data management solutions used within the WLCG collaboration, the XRootD framework and protocol became one of the most important building blocks for storage solutions in the High Energy Physics (HEP) community. The latest big milestone for the project, release 5, introduced multitude of architectural improvements and functional enhancements, including the new client side declarative API, which is the main focus of this study. In this contribution, we give an overview of the new client API and we discuss its motivation and its positive impact on overall software quality (coupling, cohesion), readability and composability.
Highlights
The XRootD [1] project aims at providing low latency and scalable data access for large scientific data sets and is based on a scalable, plug-in centric architecture and a communication protocol
For almost 10 years the XRootD framework has been very successful at facilitating data management of LHC experiments and grew into one of the most important storage technologies in the High Energy Physics (HEP) community
It comes with no surprise that XRootD development is largely driven by the use cases coming from the WLCG project, as it is the backbone of numerous software defined storage solutions used to accommodate the vast amount of data registered by the LHC experiments at CERN, most notably Atlas [4], CMS [5], LHCb [6] and Alice [7]
Summary
The XRootD [1] project aims at providing low latency and scalable data access for large scientific data sets and is based on a scalable, plug-in centric architecture and a communication protocol. It has been designed with particular emphasis for geographically distributed, file-based repositories. It comes with no surprise that XRootD development is largely driven by the use cases coming from the WLCG project, as it is the backbone of numerous software defined storage solutions (like EOS [2] and DPM [3]) used to accommodate the vast amount of data registered by the LHC experiments at CERN, most notably Atlas [4], CMS [5], LHCb [6] and Alice [7].
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