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On the impact of replica placement to the
reliability of distributed brick storage
systems
June 1, 2005

Download PDF

BibTex
Authors

Qiao Lian

Wei Chen

Zheng Zhang
Publication Type
TechReport
Pages
14
Number
MSR-TR-2005-71

Abstract

Related Info
Abstract
Data reliability of distributed brick storage systems critically depends on the replica placement
policy, and the two governing forces are repair speed and sensitivity to multiple concurrent
failures. In this paper, we provide an analytical framework to reason and quantify the impact of
replica placement policy to system reliability. The novelty of the framework is its consideration
of the bounded network bandwidth for data maintenance. We apply the framework to two
popular schemes, namely sequential placement and random placement, and show that both have
drawbacks that significantly degrade data reliability. We then propose the stripe placement
scheme and find the near-optimal configuration parameter such that it provides much better
reliability. We further discuss the possibility of addressing the problem of correlated brick
failures in our analytical framework.
Related Info
Related Files
 tr-2005-71.doc
Groups
 Systems Research Group (Asia)
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 Computer systems and networking
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 Microsoft Research Lab - Asia
 Microsoft Research Lab - Redmond
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