一句话：提出 AnyKey 键值 SSD，通过抑制元数据膨胀，在键大小差异大的多种负载下优于现有设计。
现有键值固态硬盘（KV-SSD）主要针对“值远大于键”的负载进行优化，而实践中还存在键相对较大的另一类负载。本文重新评估当前 KV-SSD 设计在这类未被充分探索的负载下的表现，发现其性能显著下降，并指出根因是元数据规模随键尺寸增大而膨胀。为此，作者提出 AnyKey，一种新型 KV-SSD 设计，使元数据大小在不同键尺寸下都不会增长。基于多种真实负载的详细评估表明，在键和值尺寸变化的不同类型工作负载下，AnyKey 均优于当前最先进的 KV-SSD 设计。
Key-value solid-state drives (KV-SSDs) are considered as a potential storage solution for large-scale key-value (KV) store applications. Unfortunately, the existing KV-SSD designs are tuned for a specific type of workload, namely, those in which the size of the values are much larger than the size of the keys. Interestingly, there also exists another type of workload, in practice, in which the sizes of keys are relatively large. We re-evaluate the current KV-SSD designs using such unexplored workloads and document their significantly-degraded performance. Observing that the performance problem stems from the increased size of the metadata, we subsequently propose a novel KV-SSD design, called AnyKey, which prevents the size of the metadata from increasing under varying sizes of keys. Our detailed evaluation using a wide range of real-life workloads indicates that AnyKey outperforms the state-of-the-art KV-SSD design under different types of workloads with varying sizes of keys and values.
@inproceedings{0004L0KKC25,
title = {AnyKey: A Key-Value SSD for All Workload Types},
author = {Chanyoung Park and Jungho Lee and Chun-Yi Liu and Kyungtae Kang and Mahmut Taylan Kandemir and Wonil Choi},
booktitle = {ASPLOS},
year = {2025},
doi = {10.1145/3669940.3707279}
}