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FAST '04 — Abstract

Pp. 239-252 of the Proceedings

Segank: A Distributed Mobile Storage System

Sumeet Sobti, Nitin Garg, Fengzhou Zheng, Junwen Lai, Yilei Shao, Chi Zhang, and Elisha Ziskind, Princeton University; Arvind Krishnamurthy, Yale University; Randolph Y. Wang, Princeton University


This paper presents a distributed mobile storage system designed for storage elements connected by a network of non-uniform quality. Flexible data placement is crucial, and it leads to challenges for locating data and keeping it consistent. Our system employs a location- and topology-sensitive multicast-like solution for locating data, lazy peer-to-peer propagation of invalidation information for ensuring consistency, and a distributed snapshot mechanism for supporting sharing. The combination of these mechanisms allows a user to make the most of what a non-uniform network has to offer in terms of gaining fast access to fresh data, without incurring the foreground penalty of keeping distributed elements on a weak network consistent.
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