Self-Adaptation Applied to Peer-Set Maintenance in Chord via a Generic Autonomic Management Framework

Self-adaptation can be achieved by autonomic management of facets of a system´s constituent components. This paper reports on a generic autonomic management framework and on its application to a key-based routing protocol as used in the peer-to-peer overlay Chord. The framework implements generic components of the autonomic management cycle. In the work reported here it was used to build a manager which autonomically controls the maintenance scheduling of the peer-set in individual Chord nodes, governed by some high-level policies. This manager improved routing performance and resource consumption in comparison to statically configured Chord nodes in a deployed network which was exposed to various membership churn and workload patterns.