Online Consistency Checking for Replicated Objects

In this paper we are concerned with the live verification of the consistency of a replicated system, an issue that has not been addressed by the research community so far. We consider the problem of how to enable the system to detect automatically and in production whether the invariants defining the correctness of object replication are violated. This feature could greatly improve the dependability of distributed applications and is necessary for constructing self-managing and self-healing replicated systems. We focus on systems that enforce strongly consistent replication: all replicas of each object must be kept "continuously" in-sync. This replication strategy is appropriate for application domains where correctness guarantees in spite of failures are more important than performance and scalability. We present the design and implementation of a replicated web service capable of self-checking whether all replicas are indeed kept in sync. This check occurs on-line, transparently to clients. We also discuss the performance cost of self-checking in our prototype.

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On-line self-checking of replication consistency for autonomic computing

Bartoli

Masarin

2006

Cluster Comput

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Online Consistency Checking for Replicated Objects

Cited by 1 publication

References 4 publications

On-line self-checking of replication consistency for autonomic computing

On-line self-checking of replication consistency for autonomic computing

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