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The paper presents a replication-based approach that enables both fast and reliable stream processing over wide area networks. The approach replicates stream processing operators in a manner where operator replicas compete with each other to make the earliest impact. Therefore, any processing downstream from such replicas can proceed by relying on the fastest replica without being held back by slow or failed ones. Furthermore, the approach allows replicas to produce output in different orders so as to avoid the cost of forcing an identical execution across replicas, without sacrificing correctness. The paper first considers semantic issues for correct replicated stream processing and, based on a formal foundation, extend common stream-processing primitives.

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Format:PDFSize:687 KB
Date:Jan 2007
Pages:10

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