Rachid Guerraoui

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Publications associées (292)

High Throughput Total Order Broadcast for Cluster Environments

Rachid Guerraoui, Bastian Pochon, Ron Levy

Total order broadcast is a fundamental communication primitive that plays a central role in bringing cheap software-based high availability to a wide array of services. This paper studies the practical performance of such a primitive on a cluster of homoge ...

2006

A General Characterization of Indulgence (Invited Paper)

Rachid Guerraoui

An indulgent algorithm is a distributed algorithm that, besides tolerating process failures, also tolerates arbitrarily long periods of instability, with an unbounded number of timing and scheduling failures. In particular, no process can take any irrevoca ...

2006

GosSkip, an Efficient, Fault-Tolerant and Self Organizing Overlay Using Gossip-based Construction and Skip-Lists principles

Rachid Guerraoui, Sidath Handurukande, Anne-Marie Kermarrec, Kévin Clément Huguenin

This paper presents GosSkip, a self organizing and fully distributed overlay that provides a scalable support to data storage and retrieval in dynamic environments. The structure of GosSkip, while initially possibly chaotic, eventually matches a perfect se ...

2006

The Weakest Failure Detectors to Boost Obstruction-Freedom

Rachid Guerraoui, Michal Kapalka

This paper determines necessary and sufficient conditions to implement wait-free and non-blocking contention managers in a shared memory system. The necessary conditions hold even when universal objects (like compare-and-swap) or random oracles are availab ...

2006

How Fast Can a Very Robust Read Be?

Rachid Guerraoui, Marko Vukolic

This paper studies the time complexity of reading unauthenticated data from a distributed storage made of a set of failure-prone base objects. More specifically, we consider the abstraction of a robust read/write storage that provides wait-free access to u ...

2006

How Fast Can Eventual Synchrony Lead to Consensus?

Rachid Guerraoui, Partha Dutta

2005

Gracefully Degrading Fair Exchange with Security Modules

Rachid Guerraoui, Gildas Avoine, Marko Vukolic

The fair exchange problem is key to trading electronic items in systems of mutually untrusted parties. In modern variants of such systems, each party is equipped with a security module. The security modules trust each other but can only communicate by exch ...

2005

Computing with Reads and Writes in the Absence of Step Contention

Rachid Guerraoui

This paper studies implementations of concurrent objects that exploit the absence of step contention. These implementations use only reads and writes when a process is running solo. The other processes might be busy with other objects, swapped-out, failed, ...

2005

(Almost) All Objects are Universal in Message Passing Systems

Rachid Guerraoui

2005

What Can Be Implemented Anonymously?

Rachid Guerraoui, Eric Ruppert

The vast majority of papers on distributed computing assume that processes are assigned unique identifiers before computation begins. But is this assumption necessary? What if processes do not have unique identifiers or do not wish to divulge them for reas ...

2005

The Inherent Price of Indulgence

Rachid Guerraoui, Partha Dutta

This paper presents a tight lower bound on the time complexity of indulgent consensus algorithms, i.e., consensus algorithms that use unreliable failure detectors. We state and prove our tight lower bound in the unifying framework of round-by-round fault d ...

2005

Frugal Event Dissemination in a Mobile Environment

Rachid Guerraoui

This paper describes an event dissemination algorithm that implements a topic-based publish/subscribe interaction abstraction in mobile ad-hoc networks (MANETs). Our algorithm is frugal in two senses. First, it reduces the total number of duplicates and pa ...

Springer2005

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