2006 USENIX Annual Technical Conference Abstract
Pp. 341–355 of the Proceedings
Structured and Unstructured Overlays under the Microscope: A Measurement-based View of Two P2P Systems That People Use
Yi Qiao and Fabián E. Bustamante, Northwestern University
Abstract
Existing peer-to-peer systems rely on overlay network protocols for
object storage and retrieval and message routing. These overlay
protocols can be broadly classified as structured and unstructured -
structured overlays impose constraints on the network topology for
efficient object discovery, while unstructured overlays organize nodes
in a random graph topology that is arguably more resilient to peer
population transiency. There is an ongoing discussion on the pros and
cons of both approaches. This paper contributes to the discussion a
multiple-site, measurement-based study of two operational and
widely-deployed file-sharing systems. The two protocols are evaluated
in terms of resilience, message overhead, and query performance. We
validate our findings and further extend our conclusions through
detailed analysis and simulation experiments.
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