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
ACM Transactions on Computer Systems (TOCS)
TAG: a Tiny AGgregation service for ad-hoc sensor networks
ACM SIGOPS Operating Systems Review - OSDI '02: Proceedings of the 5th symposium on Operating systems design and implementation
The Cougar Project: a work-in-progress report
ACM SIGMOD Record
The Piazza Peer Data Management System
IEEE Transactions on Knowledge and Data Engineering
The price of validity in dynamic networks
SIGMOD '04 Proceedings of the 2004 ACM SIGMOD international conference on Management of data
A scalable distributed information management system
Proceedings of the 2004 conference on Applications, technologies, architectures, and protocols for computer communications
Implementing aggregation and broadcast over Distributed Hash Tables
ACM SIGCOMM Computer Communication Review
Approximating Aggregation Queries in Peer-to-Peer Networks
ICDE '06 Proceedings of the 22nd International Conference on Data Engineering
Attack-resilient hierarchical data aggregation in sensor networks
Proceedings of the fourth ACM workshop on Security of ad hoc and sensor networks
Querying the internet with PIER
VLDB '03 Proceedings of the 29th international conference on Very large data bases - Volume 29
Data management in large-scale p2p systems
VECPAR'04 Proceedings of the 6th international conference on High Performance Computing for Computational Science
Improving validity of query answering in dynamic systems
Proceedings of the Third International Workshop on Reliability, Availability, and Security
Self-adaptive approximate queries for large-scale information aggregation
International Journal of Web and Grid Services
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Peer-to-peer database systems (P2PDBs) aim at providing database services with node autonomy, high availability and loose coupling between participating nodes by building the DBMS on top of a peer-to-peer network. A key feature of current peer-to-peer systems is resilience to churn in the overlay network layer. A major challenge in P2PDBs is to provide similar robustness in the data and query processing layer. In this paper we in particular describe how aggregation queries in P2PDBs can be handled in order to reduce the impact of churn on accuracy of results. We perform a formal study of data loss and accuracy of such queries, and describe new approaches that increase the accuracy of aggregation queries in P2PDBs under churn.