Concept

Paxos (informatique)

Publications associées (101)

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A formal approach to fault tolerant distributed consensus

Rachele Fuzzati

The term distributed Consensus denotes the problem of getting a certain number of processes, that could be far away from each other and that exchange messages through some communication means, to all agree on the same value. This problem has been proved im ...

EPFL2008

Optimistic Erasure-Coded Distributed Storage

Rachid Guerraoui, Ron Levy, Partha Dutta

We study erasure-coded atomic register implementations in an asynchronous crash-recovery model. Erasure coding provides a cheap and space-efficient way to tolerate failures in a distributed system. This paper presents ORCAS, Optimistic eRasure-Coded Atomic ...

2008

Using Bounded Model Checking to Verify Consensus Algorithms

André Schiper

This paper presents an approach to automatic verification of asynchronous round-based consensus algorithms. We use model checking, a widely practiced verification method; but its application to asynchronous distributed algorithms is difficult because the s ...

2008

On the Complexity of Asynchronous Gossip

Rachid Guerraoui, Seth Gilbert

In this paper, we study the complexity of gossip in an asynchronous, message-passing fault-prone distributed system. In short, we show that an adaptive adversary can significantly hamper the spreading of a rumor, while an oblivious adversary cannot. In the ...

2008

On Collision-fast Atomic Broadcast

Rodrigo Malta Schmidt, Fernando Pedone

Atomic Broadcast, an important abstraction in dependable distributed computing, is usually implemented by many instances of the well-known consensus problem. Some asynchronous consensus algorithms achieve the optimal latency of two (message) steps but cann ...

2007

Distributed Consensus, Revisited

Rachele Fuzzati, Massimo Merro

We provide a novel model to formalize a well-known algorithm, by Chandra and Toueg, that solves Consensus among asynchronous distributed processes in the presence of a particular class of failure detectors (Diamond S or, equivalently, Omega), under the hyp ...

2007

The Heard-Of Model: Computing in Distributed Systems with Benign Failures

André Schiper

Problems in fault-tolerant distributed computing have been studied in a variety of models. These models are structured around two central ideas: Degree of synchrony and failure model are two independent parameters that determine a particular type of system ...

2007

Gossip along the way: order-optimal consensus through randomized path averaging

Martin Vetterli, Patrick Thiran, Florence Bénézit

Gossip algorithms have recently received significant attention, mainly because they constitute simple and robust algorithms for distributed information processing over networks. However for many topologies that are realistic for wireless ad-hoc and sensor ...

2007

Multicoordinated Paxos

Rodrigo Malta Schmidt, Fernando Pedone

Classic Paxos is a round-based distributed consensus algorithm. Normally, proposals are sent to the round leader and decided in two communication steps more. Fast Paxos extends Classic Paxos by allowing also fast rounds, in which a decision can be learned ...

2006

Improving Fast Paxos: being optimistic with no overhead

André Schiper

The paper addresses the cost of consensus algorithms. It has been shown that in the best case, consensus can be solved in two communication steps with f < n/2, and in one communication step with f < n/3 (f is the maximum number of faulty processes). This l ...

2006