Hermes: A Fast, Fault-Tolerant and Linearizable Replication Protocol
Antonios Katsarakis, Vasilis Gavrielatos, M. R. Siavash Katebzadeh, Arpit Joshi, Aleksandar Dragojević, Boris Grot, Vijay Nagarajan · 2020
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.