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Modern block-addressable NVMe SSDs provide much higher bandwidth and similar performance for random and sequential access. Persistent key-value stores (KVs) designed for earlier storage devices, using either Log-Structured Merge (LSM) or B trees, do not take full advantage of these new devices. Logic to avoid random accesses, expensive operations for keeping data sorted on disk, and synchronization bottlenecks make these KVs CPU-bound on NVMe SSDs.
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Lepers et al. (Mon,) studied this question.
synapsesocial.com/papers/6a02e834cab5b316e39e2440 — DOI: https://doi.org/10.1145/3341301.3359628
Baptiste Lepers
Oana Balmau
Karan Gupta
The University of Sydney
Nutanix (United States)
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