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Patent Searching and Data


Title:
COMPUTER AND CACHE CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2018/154725
Kind Code:
A1
Abstract:
Provided is a computer which generates a virtual database. The computer connects with a plurality of database systems which manage databases, and with a cache memory system which provides a cache area. The computer holds: virtual database management information for managing a plurality of databases constituting a virtual database; cache management information; and latency information for managing a latency at the time of acquiring data from a database. If there is a lack of cache area for storing data acquired upon reception of a query for referencing the virtual database, the computer selects, on the basis of an evaluation value calculated by using the cache management information and the latency information, a cash area from which cache data is to be deleted.

Inventors:
KONDO, Nobukazu (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
KURATA, Naruki (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
SATO, Katsuto (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
JP2017/007168
Publication Date:
August 30, 2018
Filing Date:
February 24, 2017
Export Citation:
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Assignee:
HITACHI, LTD. (6-6 Marunouchi 1-chome, Chiyoda-ku Tokyo, 80, 〒1008280, JP)
International Classes:
G06F12/00
Foreign References:
JP2016146205A2016-08-12
JP2012203792A2012-10-22
Attorney, Agent or Firm:
TOU-OU PATENT FIRM (Urban Toranomon Bldg, 16-4 Toranomon 1-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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