Over the years, different meanings have been associated with the word consistency in the
distributed systems community. While in the'80s “consistency” typically meant strong …

The introduction of network function virtualisation (NFV) represents a significant change in
networking technology, which may create new opportunities in terms of cost efficiency …

In this paper, we describe ZooKeeper, a service for coordinating processes of distributed
applications. Since ZooKeeper is part of critical infrastructure, ZooKeeper aims to provide a …

Online services distribute and replicate state across geographically diverse data centers and
direct user requests to the closest or least loaded site. While effectively ensuring low latency …

We describe the design and implementation of Walter, a key-value store that supports
transactions and replicates data across distant sites. A key feature behind Walter is a new …

This article describes the design, implementation, and evaluation of Depot, a cloud storage
system that minimizes trust assumptions. Depot tolerates buggy or malicious behavior by …

A longstanding vision in distributed systems is to build reliable systems from unreliable
components. An enticing formulation of this vision is Byzantine Fault-Tolerant (BFT) state …

Cloud-based services are an attractive deployment model for user-facing applications like
word processing and calendaring. Unlike desktop applications, cloud services allow multiple …

This paper introduces a family of leaderless Byzantine fault tolerance protocols, built around
a metastable mechanism via network subsampling. These protocols provide a strong …

This paper presents Eve, a new Execute-Verify architecture that allows state machine
replication to scale to multi-core servers. Eve departs from the traditional agree-execute …