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Reperasure: Replication Protocol using
Erasure-code
June 1, 2002

Download Document

BibTex
Authors

Zheng Zhang

Qiao Lian
Publication Type
TechReport
Pages
6
Number
MSR-TR-2002-59

Abstract

Related Info
Abstract
Peer-to-peer overlay networks offer a convenient way to host an infrastructure that can scale to
the size of the Internet and yet stay manageable. These overlays, which are essentially selforganizing distributed hash tables (DHT), however, face challenges of data reliability because of
the dynamic nature of the system. Furthermore, in order to see wider adoption, it is time to
design support for generic replication mechanisms capable of handling arbitrary update requests
– most of the existing proposals are deep archival systems in nature. Utilizing the fact that
DHT can function as a super-reliable and high performance disk when data stored inside are
erasure coded, we believe practical and simple protocols can be designed. In this paper, we
introduce the reperasure protocol, a layer on top of the basic DHT, which efficiently supports
strong consistency semantic with high availability guarantee. By relieving the DHT layer out of
replication duty inside, a cleaner overall architecture can be derived because of the clear division
of responsibility.
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