Voting with Ghosts
نویسندگان
چکیده
Data replication is a technique for increasing the availability of data. Two popular algorithms for maintaining consistency among the replicas are Weighted Voting [1] and Available Copies [2] In recent papers [3] it has been shown that under common circumstances Available Copies (AC) performs better than Weighted Voting (WV). However, the issue of network partitioning due to gateway crashes is ignored in AC. We present an improvement of WV that, if configured accordingly, performs as well as AC, but, unlike AC, also works correctly in the face of network partitioning.
منابع مشابه
An Available Copy Protocol Tolerating Network Partitions
Maintaining in a consistent state multiple copies of the same data is a complex task, especially when the copies reside on sites that can be separated from each other by network partitions. All existing replication controls that tolerate network partitions use quorums to provide mutual exclusion and prevent inconsistent updates. Unfortunately these protocols require a minimum of n + 2 voting si...
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