Virtual Machine Backup Technologies: VMware VADP, Hyper‑V VSS, and Citrix XenServer Interfaces and Principles
The article explains the evolution and principles of virtualization backup technologies, detailing VMware's VADP API with its SAN, Hot‑add, and NBD modes, Hyper‑V's VSS‑based backup approach, and Citrix XenServer's backup API, while comparing their architectures and use‑cases.