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Abstract
Today's datacenter applications are underpinned by datastores that are responsible for providing availability, consistency, and performance. For high availability in the presence of failures, these datastores replicate data across several nodes. This is accomplished with the help of a reliable replication protocol that is responsible for maintaining the replicas strongly-consistent even when faults occur. Strong consistency is preferred to weaker consistency models that cannot guarantee an intuitive behavior for the clients. Furthermore, to accommodate high demand at real-time latencies, datastores must deliver high throughput and low latency.This work introduces Hermes, a broadcast-based reliable replication protocol for in-memory datastores that provides both high throughput and low latency by enabling local reads and fully-concurrent fast writes at all replicas. Hermes couples logical timestamps with cache-coherence-inspired invalidations to guarantee linearizability, avoid write serialization at a centralized ordering point, resolve write conflicts locally at each replica (hence ensuring that writes never abort) and provide fault-tolerance via replayable writes. Our implementation of Hermes over an RDMA-enabled reliable datastore with five replicas shows that Hermes consistently achieves higher throughput than state-of-the-art RDMA-based reliable protocols (ZAB and CRAQ) across all write ratios while also significantly reducing tail latency. At 5% writes, the tail latency of Hermes is 3.6X lower than that of CRAQ and ZAB.
Original language | English |
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Title of host publication | Proceedings of the Twenty-Fifth International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS) |
Place of Publication | Lausanne, Switzerland |
Publisher | Association for Computing Machinery (ACM) |
Pages | 201-217 |
Number of pages | 17 |
ISBN (Print) | 9781450371025 |
DOIs | |
Publication status | Published - 9 Mar 2020 |
Event | 25th International Conference on Architectural Support for Programming Languages and Operating Systems - Lausanne, Switzerland Duration: 16 Mar 2020 → 20 Mar 2020 Conference number: 25 https://asplos-conference.org/ |
Publication series
Name | ASPLOS '20 |
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Conference
Conference | 25th International Conference on Architectural Support for Programming Languages and Operating Systems |
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Abbreviated title | ASPLOS 2020 |
Country/Territory | Switzerland |
City | Lausanne |
Period | 16/03/20 → 20/03/20 |
Internet address |
Keywords / Materials (for Non-textual outputs)
- replication
- throughput
- latency
- consistency
- fault-tolerant
- availability
- rdma
- linearizability
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Dive into the research topics of 'Hermes: a Fast, Fault-Tolerant and Linearizable Replication Protocol'. Together they form a unique fingerprint.Projects
- 1 Finished
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C3- Scalable & Verified Shared Memory via Consistency-directed Cache Coherence
Nagarajan, V., Jackson, P. & Topham, N.
9/11/15 → 30/04/19
Project: Research