Chord: A scalable peer-to-peer lookup service for internet applications
Proceedings of the 2001 conference on Applications, technologies, architectures, and protocols for computer communications
A scalable content-addressable network
Proceedings of the 2001 conference on Applications, technologies, architectures, and protocols for computer communications
Pastry: Scalable, Decentralized Object Location, and Routing for Large-Scale Peer-to-Peer Systems
Middleware '01 Proceedings of the IFIP/ACM International Conference on Distributed Systems Platforms Heidelberg
INS/Twine: A Scalable Peer-to-Peer Architecture for Intentional Resource Discovery
Pervasive '02 Proceedings of the First International Conference on Pervasive Computing
PAST: A Large-Scale, Persistent Peer-to-Peer Storage Utility
HOTOS '01 Proceedings of the Eighth Workshop on Hot Topics in Operating Systems
Mirrors: design principles for meta-level facilities of object-oriented programming languages
OOPSLA '04 Proceedings of the 19th annual ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications
Evolving self-adaptive services using planning-based reflective middleware
Proceedings of the 5th workshop on Adaptive and reflective middleware (ARM '06)
Tapestry: a resilient global-scale overlay for service deployment
IEEE Journal on Selected Areas in Communications
Hi-index | 0.00 |
In self-adaptive systems, metadata about resources in the system (e.g., services, nodes) must be dynamically published, updated, and discarded. Current adaptive middleware approaches use statically configured, centralized repositories for storing and retrieving of such metadata. In peer-to-peer (P2P) environments, we can not assume the existence of server nodes that are always available for hosting such centralized services. However, the metadata repository is the keystone of the adaptation middleware and the consistency of adaptations relies on its reliability. To address this limitation in our QuA planning-based adaptation middleware, we introduce a P2P broker, which is a metadata advertisement service based on P2P technology. This P2P broker can be plugged into the QuA middleware to support the construction of self-adaptive applications in a P2P environment. We use a structured P2P protocol that distributes the service metadata over a set of nodes based on service type and property information. The P2P broker is therefore capable of handling node failures by providing replication of the metadata. We present a working prototype of the P2P broker as well as results from initial experiments. These results show that the metadata distributes well over the nodes in the network, thus enabling scalability and robustness to node failures.