Verification of non-functional properties of cloud-based distributed system services

Abstract

For distributed system services implemented on a cloud, system verification assumes added importance because of third-party control of cloud resources and the attendant problems of faults, QoS degradations, and security violations. Our paper focuses on a "model-based assessment" to reason about the non-functional properties of a cloud-based distributed system using observational agents. Our approach is corroborated by measurements on system-level prototypes and simulation analysis of system models in the face of hostile environment conditions. A case study of CDN realized on cloud infrastructures is also described.