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Data query method and device and data storage system

A data storage system and data query technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems affecting business, data storage system crash and downtime, permanent database performance degradation, etc., to reduce load Excessively large, risk-reducing effects

Inactive Publication Date: 2018-11-23
ALIBABA (CHINA) CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

When the number of concurrent query requests is relatively large, if the cache database fails, all query requests will request query data from the permanent database, which will lead to a decline in the performance of the permanent database, which will affect the business, and will directly cause serious damage to the data storage system. Consequences of a crash

Method used

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  • Data query method and device and data storage system
  • Data query method and device and data storage system
  • Data query method and device and data storage system

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Embodiment Construction

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0026] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The invention provides a data query method and device and a data storage system. The data storage system includes a first database and a second database. The first database is used for data caching. The second database is used for long-term storage of data. The method includes: when a query request of at least one user for target data is received, judging whether the target data are cached in thefirst database; if the target data are not cached in the first database, carrying out a query in the second database in response to a query request of one user therein, and importing target data, which are obtained by the query, to the first database, and returning the same to the user; and querying target data from the first database in response to query requests of the other users, and returningthe target data, which are obtained by queries, to the other users. Therefore, risks that multiple concurrent query requests cause loads of the second database to be too large in requesting data fromthe second database are reduced.

Description

technical field [0001] The present invention relates to the technical field of data query and storage, in particular to a data query method, device and data storage system. Background technique [0002] At present, commonly used data storage systems generally have two levels of databases, including a cache database for caching data when querying data, and a permanent database for long-term storage of data. When the user requests to query data, the data query is first performed in the cache database, and when the required data is queried in the cache database, the query result is returned directly. If the required data is not queried in the cache, the data is queried to the permanent database, and then the queried data is poured into the cache database, and then the data is returned from the cache database to the user. When the number of concurrent query requests is relatively large, if the cache database fails, all query requests will request query data from the permanent d...

Claims

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Application Information

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IPC IPC(8): G06F17/30
Inventor 莫智慧
Owner ALIBABA (CHINA) CO LTD
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