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- W4321786054 abstract "We propose Vigil-KV , a hardware and software co-designed framework that eliminates long-tail latency almost perfectly by introducing strong latency determinism. To make Get latency deterministic, Vigil-KV first enables a predictable latency mode (PLM) interface on a real datacenter-scale NVMe SSD, having knowledge about the nature of the underlying flash technologies. Vigil-KV at the system-level then hides the non-deterministic time window (associated with SSD’s internal tasks and/or write services) by internally scheduling the different device states of PLM across multiple physical functions. Vigil-KV further schedules compaction/flush operations and client requests being aware of PLM’s restrictions thereby integrating strong latency determinism into LSM KVs. We implement Vigil-KV upon a 1.92TB NVMe SSD prototype and Linux 4.19.91, but other LSM KVs can adopt its concept. We evaluate diverse Facebook and Yahoo scenarios with Vigil-KV, and the results show that Vigil-KV can reducethe tail latency of a baseline KV system by 3.19× while reducing the average latency by 34%, on average." @default.
- W4321786054 created "2023-02-25" @default.
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- W4321786054 date "2023-03-25" @default.
- W4321786054 modified "2023-09-29" @default.
- W4321786054 title "Realizing Strong Determinism Contract on Log-Structured Merge Key-Value Stores" @default.
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- W4321786054 doi "https://doi.org/10.1145/3582695" @default.
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