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The Optimality of Allocation Methods for Bounded Disagreement Search Queries: The Possible and the Impossible

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2 Author(s)
Abdel-Ghaffar, K.A.S. ; Dept. of Electr. & Comput. Eng., California Univ., Davis, CA ; El Abbadi, A.

Data allocation on multiple I/O devices manifests itself in many computing systems, both centralized and distributed. Data is partitioned on multiple I/O devices and clients issue various types of queries to retrieve relevant information. In this paper, we derive necessary and sufficient conditions for a data allocation method to be optimal for two important types of queries: partial match and bounded disagreement search queries. We formally define these query types and derive the optimality conditions based on coding-theoretic arguments. Although these conditions are fairly strict, we show how to construct good allocation methods for practical realistic situations. Not only are the response times bounded by a small value, but also the identification of the relevant answer set is efficient

Published in:

Knowledge and Data Engineering, IEEE Transactions on  (Volume:18 ,  Issue: 9 )

Date of Publication:

Sept. 2006

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