Method, device and system for storing distributed data

A distributed data and distributed system technology, applied in the field of distributed data storage methods, devices and systems, can solve the problems of consuming network data resources and wasting storage space

Active Publication Date: 2015-07-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a distributed data storage method, device, and system to overcome the problems of consuming network data resources and wasting storage space in secondary distributed storage in the prior art

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  • Method, device and system for storing distributed data
  • Method, device and system for storing distributed data
  • Method, device and system for storing distributed data

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Embodiment Construction

[0062] 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. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0063] A distributed database system generally includes at least one server device and multiple distributed database nodes. Among them, these distributed database nodes are used for distributed storage of data, and the stored data can usually exist in the form of data tables; the service device is used for accessing the data stored by the nod...

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Abstract

A distributed data storage method, device and system. After a first node receives a query request carrying a query identifier, if first data corresponding to the query identifier is locally stored while second data is not locally stored, according to the query identifier, a second node used for storing the first data is recalculated by the first node according to a pre-set computation rule. The first data is not required to be sent to the second node, but the storage location information about the first data is sent to the second node. After receiving the request for querying the first data, according to the storage location information, the first data is acquired by the second node from the first node, and if the request for querying the first data is not received subsequently, an operation of acquiring the first data by the second node from the first node is not triggered, thereby saving network data transmission resources and storage space.

Description

technical field [0001] Embodiments of the present invention relate to information technology, and in particular to a distributed data storage method, device and system. Background technique [0002] Massively Parallel Processing (MPP) is a common distributed database architecture. The MPP architecture distributes data to multiple database nodes, which are processed in parallel by multiple nodes, thereby increasing the processing speed. The specific method is that when creating data tables, each data table selects a column as a partition column, and uses a unified partition function to distribute and store the data values ​​included in each row in each data table to each database node. [0003] In the prior art, when a node receives a query request, if the data in more than two data tables queried by the query request has associated columns and is distributed and stored on two or more nodes, the secondary data distribution will be triggered Stored in a format so that the da...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/278G06F16/2471H04L67/1097
Inventor 王玉虎
Owner HUAWEI TECH CO LTD
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