Corpus ID: 8645709

HQ replication: a hybrid quorum protocol for byzantine fault tolerance

@inproceedings{Cowling2006HQRA,
title={HQ replication: a hybrid quorum protocol for byzantine fault tolerance},
author={James A. Cowling and Daniel S. Myers and Barbara Liskov and Rodrigo Seromenho Miragaia Rodrigues and Liuba Shrira},
booktitle={OSDI '06},
year={2006}
}
There are currently two approaches to providing Byzantine-fault-tolerant state machine replication: a replica-based approach, e.g., BFT, that uses communication between replicas to agree on a proposed ordering of requests, and a quorum-based approach, such as Q/U, in which clients contact replicas directly to optimistically execute operations. Both approaches have shortcomings: the quadratic cost of inter-replica communication is un-necessary when there is no contention, and Q/U requires a… Expand
345 Citations
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