[PACT’08][PABA Workshop I] Addressing Churn in P2P EA

This week the first Workshop on Parallel Architerctures and Bioinspired Algorithms is being held in Toronto (Canada) in conjunction with the prestigious conference Parallel Architectures and Compilation Techniques (PACT).

In extension to our line of work in P2P EAs, we have presented the work:

In this paper we analyse the robustness of a Peer-to-Peer (P2P) Evolutionary Algorithm (EA) subject to the following dynamics: peers leave the system independently from each other causing a collective effect known as churn. The algorithm has been designed to tackle large instances of computationally expensive problems and, in this paper, we will assess its behavior under churn. To that end, we have performed a scalability analysis in five different scenarios using the Massively Multimodal Deceptive Problem as a
benchmark.  In all cases, the P2P EA reaches the success criterion without a penalty on the response time. The key to the algorithm robustness is to ensure enough peers at the beginning of the experiment. Some of them leave but those that remain are enough to guarantee a reliable  convergence.

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