Patronus: High-Performance and Protective Remote Memory


Bin Yan, Youyou Lu, Qing Wang, Minhui Xie, and Jiwu Shu, Tsinghua University


RDMA-enabled remote memory (RM) systems are gaining popularity with improved memory utilization and elasticity. However, since it is commonly believed that fine-grained RDMA permission management is impractical, existing RM systems forgo memory protection, an indispensable property in a real-world deployment. In this paper, we propose PATRONUS, an RM system that can simultaneously offer protection and high performance. PATRONUS introduces a fast permission management mechanism by exploiting advanced RDMA hardware features with a set of elaborate software techniques. Moreover, to retain the high performance under exception scenarios (e.g., client failures, illegal access), PATRONUS attaches microsecond-scaled leases to permission and reserves spare RDMA resources for fast recovery. We evaluate PATRONUS over two one-sided data structures and two function-as-a-service (FaaS) applications. The experiment shows that the protection only brings 2.4% to 27.7% overhead among all the workloads, and our system performs at most ×5.2 than the best competitor.

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This content is available to:

@inproceedings {285738,
author = {Bin Yan and Youyou Lu and Qing Wang and Minhui Xie and Jiwu Shu},
title = {Patronus: {High-Performance} and Protective Remote Memory},
booktitle = {21st USENIX Conference on File and Storage Technologies (FAST 23)},
year = {2023},
isbn = {978-1-939133-32-8},
address = {Santa Clara, CA},
pages = {315--330},
url = {},
publisher = {USENIX Association},
month = feb

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