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Distributed database retrieval device and distributed database retrieval method

A database, decentralized technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of complicated main server mechanism, difficult main server, and generation of decentralized plans.

Active Publication Date: 2015-10-28
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a distributed plan that can perform optimal operations is generated for each slave server, the mechanism for generating a distributed plan for the master server becomes complicated.
That is, if the optimization function of the distributed plan processing part of the main server is improved, the optimization mechanism of the main server will be complicated
Therefore, it is difficult for the master server to generate a distributed plan in an appropriate form according to the status of each slave server

Method used

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  • Distributed database retrieval device and distributed database retrieval method
  • Distributed database retrieval device and distributed database retrieval method
  • Distributed database retrieval device and distributed database retrieval method

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Experimental program
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no. 1 Embodiment approach

[0047] figure 1 It is a configuration diagram showing the functional configuration of the distributed database search device according to the first embodiment. The distributed database search device of this embodiment performs search based on a search formula (hereinafter, referred to as an inquiry query) input from a user, and outputs a search result.

[0048] Such as figure 1 As shown, the distributed database search device of this embodiment is configured by connecting a computer 0 functioning as a master server and computers 1 to N functioning as slave servers.

[0049]The computer 0 serving as the master server includes a syntax analysis unit 11, a query division unit 12, a distributed plan generation unit 13, a division query combination operation addition unit 14, a distributed plan update unit 15, a distributed plan execution unit 16, and a sending and receiving unit 17 (the first sending and receiving unit). part), and the information storage part 20 (first storage ...

no. 2 Embodiment approach

[0247] A distributed database search device according to a second embodiment will be described with reference to the drawings. In addition, the same code|symbol is attached|subjected to the same structure as the distributed database search apparatus of 1st Embodiment, and description is abbreviate|omitted.

[0248] Figure 25 It is a configuration diagram showing the functional configuration of the distributed database search device of the second embodiment. Such as Figure 25 As shown, the distributed database retrieval device of this embodiment is in figure 1 The configuration of the distributed database search device shown also includes the configurations of schema generating units 18 and 35 and schema changing units 19 and 36 .

[0249] The so-called schema (schema) is a data structure that holds the type and location information of stored data.

[0250] The schema generating units 18 and 35 generate schemas of data input and output as a result of computation performed...

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Abstract

The present invention provides a dispersed database retrieval apparatus which can realize efficient retrieval without making a mechanism at a master server side become complicated. In one mode of execution, the dispersed database retrieval apparatus is formed by connecting a master server which queries a database on basis of input inquires with a plurality of subordinate servers provided with the database. The subordinate servers are provided with a second transceiving section for receiving and sending data from and to the master server, a local plan candidate generation section for generating local plan candidates on basis of received dispersed plans, and a local plan section for determining a local plan with a lowest operation cost on basis of the generated local plan candidates.

Description

[0001] This application benefits from the priority of Japanese Patent Application No. 2011-131854 filed on June 14, 2011, and uses the entire content thereof. technical field [0002] Embodiments of the present invention relate to a distributed database search device and a distributed database search method. Background technique [0003] In order to handle a large amount of data such as table format or XML format, there is a distributed database search device composed of a plurality of servers. A distributed database retrieval device generally has a master server that communicates with users and a slave server that actually manages data. [0004] The slave servers may all be composed of database retrieval devices of the same architecture, or may be composed of database retrieval devices of different architectures. [0005] Generally, when a search formula (hereinafter referred to as a query) is input to the distributed database search device, the main server receives the qu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
Inventor 黑田洋介
Owner KK TOSHIBA