Hydra : Resilient and Highly Available Remote Memory
- Authors
- Lee, Youngmoon; Al Maruf, Hasan; Chowdhury, Mosharaf; Cidon, Asaf; Shin, Kang G.
- Issue Date
- Feb-2022
- Publisher
- USENIX
- Citation
- USENIX Conference on File and Storage Technologies (FAST), pp 181 - 197
- Pages
- 17
- Indexed
- SCOPUS
- Journal Title
- USENIX Conference on File and Storage Technologies (FAST)
- Start Page
- 181
- End Page
- 197
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/114521
- Abstract
- We present Hydra, a low-latency, low-overhead, and highly available resilience mechanism for remote memory. Hydra can access erasure-coded remote memory within a single-digit µs read/write latency, significantly improving the performance-efficiency tradeoff over the state-of-the-art - it performs similar to in-memory replication with 1.6× lower memory overhead. We also propose CodingSets, a novel coding group placement algorithm for erasure-coded data, that provides load balancing while reducing the probability of data loss under correlated failures by an order of magnitude. With Hydra, even when only 50% memory is local, unmodified memory-intensive applications achieve performance close to that of the fully in-memory case in the presence of remote failures and outperforms the state-of-the-art remote-memory solutions by up to 4.35×. © AST 2022.All rights reserved.
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