Pseudo-active Replication in Heterogeneous Clusters (特集:マルチメディア分散・協調コンピュ-ティング)

概要

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One approach to making distributed systems fault-tolerant is to replicate the processes. In systems composed of widely available commercial products, the replicas have to be realized in various types of processors. In active replication, the replicas are computed and communicated in the same synthronous way, and the computation speed of the process depends on that of the slowest replica. In this paper, we discuss a novel "pseudo-active" replication scheme in which events do not necessarily occur simultaneously or in the same order, and do not necessarily occur in the replicas. New requests can be issued to the replicas if some, but not necessarily all, replies are received from the replicas, without waiting for the completion of the slower replicas.
一般社団法人情報処理学会の論文
1998-02-15