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Summary: Semantically-Smart Disk Systems: Past, Present, and Future
Andrea C. Arpaci-Dusseau, Remzi H. Arpaci-Dusseau, Lakshmi N. Bairavasundaram,
Timothy E. Denehy, Florentina I. Popovici, Vijayan Prabhakaran, Muthian Sivathanu
Computer Sciences Department
Google, Inc.
University of Wisconsin, Madison Mountain View, California
Abstract
In this paper we describe research that has been on-going within
our group for the past four years on semantically-smart disk sys-
tems. A semantically-smart system goes beyond typical block-
based storage systems by extracting higher-level information
from the stream of traffic to disk; doing so enables new and in-
teresting pieces of functionality to be implemented within low-
level storage systems. We first describe the development of our
efforts over the past four years, highlighting the key technologies
needed to build semantically-smart systems as well as the main
weaknesses of our approach. We then discuss future directions
in the design and implementation of smarter storage systems.
1 Introduction
For the past four years our group has been working on
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