Robust Content-Centric SLA Enforcement in Federated Cloud Environments.

In this paper we present a system for declaring and enforcing SLAs in Cloud environments. The SLAs proposed are enriched with content terms, storlets and federation capabilities and provide high degrees of customizability for clients. A mechanism for SLA enforcement has been designed and implemented which, based on policies, measurements, usage data computations, and monitoring methods permits proactive SLA violation detection and handling. SLA renegotiation is supported as well. The proposed framework has been developed and evaluated in challenging scenarios in a variety of different application domains.