Method of k-neighbour query based on data mesh

A query method and data grid technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., to achieve the effect of improving performance, improving efficiency, and good code portability

Inactive Publication Date: 2007-04-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Although some research has been done on traditional database query in grid environment [9，

Method used

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  • Method of k-neighbour query based on data mesh
  • Method of k-neighbour query based on data mesh
  • Method of k-neighbour query based on data mesh

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Embodiment Construction

[0081] The technical scheme and the steps of the specific implementation of the high-dimensional k-NN query based on the data grid environment of the present invention are as follows:

[0082] (1) Data distribution strategy based on starting point distance

[0083] In order to maximize the parallelism of vector reduction processing at the data node level, the present invention proposes to perform data distribution on vector data based on the distance from the starting point, so that for each query, each data node can perform vector reduction in parallel, thereby Significantly improve the efficiency of query execution.

[0084] The steps for this data distribution are as follows:

[0085] Input: Ω: vector set, α data nodes;

[0086] Output: Ω(1 to α): vectors stored in different data nodes;

[0087] (1) Calculate the starting point distance of each vector and sort them;

[0088] (2) According to the principle that the total number of vectors in each slice is consistent, the...

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Abstract

The invention relates to a k nearby high-dimension inquire method based on data grid. Wherein, the invention via vector reduction, package transmission and product line reduces the response time of k nearby inquire. The execute node of distance calculation is dynamically set by the node condition of mesh, with better expandable property. And since the search based on content is high-dimension search, the invention can be transplanted to the searches of variable mediums.

Description

technical field [0001] The invention relates to the field of database and network, in particular to a k-nearest neighbor query method based on data grid. Background technique [0002] With the continuous development of grid and multimedia technology, especially in recent years, the explosive growth of multimedia information on the Internet, the retrieval and indexing of massive multimedia information based on content [1] has become a hot research field. How to use the grid's parallel computing ability to speed up content-based multimedia retrieval is a very important research topic. [0003] High-dimensional index technology has experienced more than 20 years of research [11] , the technologies used are mainly divided into three categories: the first category is a tree index based on data and space sharding, such as R-tree [12] and its variants [13, 14], etc. However, these tree index methods are only suitable for low-dimensional situations. As the dimension increases, t...

Claims

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Application Information

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IPC IPC(8): H04L29/02G06F17/30
Inventor 庄越挺庄毅吴飞
Owner ZHEJIANG UNIV
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