On the performance of a retransmission-based synchronizer

Authors:
Thomas Nowak;Matthias Függer;Alexander Köíler
Affiliations:
LIX, ícole polytechnique, 91128 Palaiseau, France;ECS Group, TU Wien, 1040 Vienna, Austria;ECS Group, TU Wien, 1040 Vienna, Austria
Venue:
Theoretical Computer Science
Year:
2013

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Abstract

Designing algorithms for distributed systems that provide a round abstraction is often simpler than designing for those that do not provide such an abstraction. Further, distributed systems need to tolerate various kinds of failures. The concept of a synchronizer deals with both: It constructs rounds and allows masking of transmission failures. One simple way of dealing with transmission failures is to retransmit a message until it is known that the message was successfully received. We calculate the exact value of the average rate of a retransmission-based synchronizer in environments with probabilistic message loss, within which the synchronizer shows nontrivial timing behavior. We show how to make this calculation efficient, and present analytical results on the convergence speed. The theoretic results, based on Markov theory, are backed up with Monte Carlo simulations.