LoLKV: The Logless, Linearizable, RDMA-based Key-Value Storage System


Ahmed Alquraan and Sreeharsha Udayashankar, University of Waterloo; Virendra Marathe, Oracle Labs; Bernard Wong and Samer Al-Kiswany, University of Waterloo


We present LoLKV, a novel logless replicated key-value storage system. LoLKV follows a fundamentally different approach for designing a linearizable key-value storage system compared to state-of-the-art systems. LoLKV forgoes the classical log-based design and uses lock-free approach to allow multiple threads to concurrently update objects. It presents a novel leader election and consolidation approach to handle complex failure scenarios. LoLKV’s followers are passive, reducing their overall CPU usage. Our evaluation shows that LoLKV achieves 1.7–10× higher throughput and 20–92% lower tail latency than other state-of-the-art low-latency key-value stores.

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@inproceedings {295473,
author = {Ahmed Alquraan and Sreeharsha Udayashankar and Virendra Marathe and Bernard Wong and Samer Al-Kiswany},
title = {{LoLKV}: The Logless, Linearizable, {RDMA-based} {Key-Value} Storage System},
booktitle = {21st USENIX Symposium on Networked Systems Design and Implementation (NSDI 24)},
year = {2024},
isbn = {978-1-939133-39-7},
address = {Santa Clara, CA},
pages = {41-54},
url = {},
publisher = {USENIX Association},
month = apr