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André Schiper

Related publications (192)

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Optimizing Paxos with batching and pipelining

André Schiper, Nuno Filipe de Sousa Santos

Paxos is probably the most popular state machine replication protocol. Two optimizations that can greatly improve its performance are batching and pipelining. However, tuning these two optimizations to achieve high-throughput can be challenging, as their e ...

Elsevier2013

Addressing the ZooKeeper Synchronization Inefficiency

André Schiper, Babak Kalantari

In this paper we discuss the problem of synchronization in ZooKeeper, a fault-tolerant distributed coordination framework. One of the key features of ZooKeeper is to move away from blocking API such as locks, in order to avoid problems with slow or faulty ...

2012

Quantitative Analysis of Consensus Algorithms

André Schiper, Martin Hutle, Fatemeh Borran, Nuno Filipe de Sousa Santos

Consensus is one of the key problems in fault-tolerant distributed computing. Although the solvability of consensus is now a well-understood problem, comparing different algorithms in terms of efficiency is still an open problem. In this paper, we address ...

2012

High-Performance RMA-Based Broadcast on the Intel SCC

André Schiper, Thomas Ropars, Omid Shahmirzadi, Darko Petrovic

Many-core chips with more than 1000 cores are expected by the end of the decade. To overcome scalability issues related to cache coherence at such a scale, one of the main research directions is to leverage the message-passing programming model. The Intel ...

2012

Asynchronous Broadcast on the Intel SCC using Interrupts

André Schiper, Thomas Ropars, Omid Shahmirzadi, Darko Petrovic

This paper focuses on the design of an asynchronous broadcast primitive on the Intel SCC. Our solution is based on OC-Bcast, a state-of-the-art k-ary tree synchronous broadcast algorithm that leverages the parallelism provided by on-chip Remote Memory Acce ...

2012

Tuning Paxos for high-throughput with batching and pipelining

André Schiper, Nuno Filipe de Sousa Santos

Paxos is probably the most popular state machine replication protocol. Two optimizations that can greatly improve its performance are batching and pipelining. Nevertheless, tuning these two optimizations to achieve high-throughput can be challenging, as th ...

2012

Implementing Virtual Machine Replication: A Case Study using Xen and KVM

André Schiper, Darko Petrovic

Virtual machine (VM) replication has been recognized as an inexpensive way of providing high availability on commodity hardware. Unfortunately, its impact on system performance is far from negligible and strategies have been proposed to mitigate this probl ...

IEEE Computer Society Press2012

S-Paxos: Offloading the Leader for High Throughput State Machine Replication

André Schiper, Zarko Milosevic, Nuno Filipe de Sousa Santos, Martin Biely

Implementations of state machine replication are prevalently using variants of Paxos or other leader-based protocols. Typically these protocols are also leader-centric, in the sense that the leader performs more work than the non-leader replicas. Such prot ...

2012

State machine replication is a technique for making services fault-tolerant by replicating them over a group of machines. Although the theory of state machine replication has been studied extensively, the engineering challenges of converting a theoretical ...

2011

Consensus is at the heart of fault-tolerant distributed computing systems. Much research has been devoted to developing algorithms for this particular problem. This paper presents a semi-automatic verification approach for asynchronous consensus algorithms ...

Springer Verlag2011