XRootD: eXtended ROOT Daemon

The XRootD project provides a high-performance, fault-tolerant, and secure solution for handling massive amounts of data distributed across multiple storage resources, such as disk servers, tape libraries, and remote sites. It enables efficient data access and movement in a transparent and uniform manner, regardless of the underlying storage technology or location. It was initially developed by the High Energy Physics (HEP) community to meet the data storage and access requirements of the BaBar experiment at SLAC and later extended to meet the needs of experiments at the Large Hadron Collider (LHC) at CERN. XRootD is the core technology powering the EOS distributed filesystem, which is the storage solution used by LHC experiments and the storage backend for CERNBox. XRootD is also used as the core technology for global CDN deployments across multiple science domains.

XRootD is based on a scalable architecture that supports multi-protocol communications. XRootD provides a set of plugins and tools that allows the user to configure it freely to deploy data access clusters of any size, and which can include sophisticated features such as erasure coded files, various methods of authentication and authorization, as well as integration with other storage systems like ceph.

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