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• W3080648829 abstract "Leader-based data replication improves consistency in highly available distributed storage systems via sequential writes to the nodes. After a write has been committed by the leaders, nodes are written by a multicast mechanism and are only guaranteed to be eventually consistent. With Age of Information (AoI) as the freshness metric, we characterize how the number of leaders affects the freshness of the data retrieved by an instantaneous read query. In particular, we derive the average age of a read query for a deterministic model for the leader writing time and a probabilistic model for the follower writing time. We obtain a closed-form expression for the average age for exponentially distributed follower writing time. Our numerical results show that, depending on the relative speed of the write operation to the two groups of nodes, there exists an optimal number of leaders which minimizes the average age of the retrieved data, and that this number increases as the relative speed of writing on leaders increases." @default.
• W3080648829 created "2020-09-01" @default.
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• W3080648829 date "2020-06-01" @default.
• W3080648829 modified "2023-09-23" @default.
• W3080648829 title "Data Freshness in Leader-Based Replicated Storage" @default.
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• W3080648829 doi "https://doi.org/10.1109/isit44484.2020.9174411" @default.
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