Subjects: Computer Science >> Computer Application Technology submitted time 2020-07-20
Abstract： "
Peer Review Status:
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Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-05-20 Cooperative journals: 《计算机应用研究》
Abstract： The exact approximation of write latency for NWR databases under various consistency levels can serve the building and operating of database clusters, by finding the optimal combination of cluster size and replication factor that minimizes the building and operating cost. Existing benchmarking or queue simulating based approaches can only give incomplete results as they are limited to specific configurations and testbeds. This paper depicted the first close-form analysis of (n, r, k) fork-join queueing process of Cassandra (a typical NWR database) write operations, based on which this paper proposed the first theoretical write latency model for NWR databases. The model is capable of giving more comprehensive latency results. Experiments validated the close-form analysis of (n, r, k) fork-join queues and the write latency model respectively on simulated queues and a Cassandra cluster.
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