PhEDEx reliable, scalable dataset replication

Highe Energy physics experiments need to perform tasks as ensuring data safety, large-scale dataset replication, tape migration/stage of datasets.PhEDEx is designed for data distribution management and allows the Compact Muon Solenoid (CMS) at Large Hadron Collider (LHC) to manage large scale production trasfer of data. It provides a scalable infrastructure for managing these operations by automating many low level operations and without imposing constraints on choices of Grid or other distributed technologies