The Optimality of Allocation Methods for Bounded Disagreement Search Queries: The Possible and the Impossible
Issue No.09 - September (2006 vol.18)
Khaled A.S. Abdel-Ghaffar , IEEE
Amr El Abbadi , IEEE
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/TKDE.2006.149
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.
Access methods, file organization, maintenance, organization/structure, information theory, file organization, retrieval models, Cartesian product files, multiple disk systems, coding theory.
Khaled A.S. Abdel-Ghaffar, Amr El Abbadi, "The Optimality of Allocation Methods for Bounded Disagreement Search Queries: The Possible and the Impossible", IEEE Transactions on Knowledge & Data Engineering, vol.18, no. 9, pp. 1194-1206, September 2006, doi:10.1109/TKDE.2006.149