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Data reading method and device, electronic equipment and readable storage medium

A data reading and data storage technology, applied in the field of data processing, can solve the problems of bandwidth occupation and low reading and writing efficiency

Active Publication Date: 2019-09-03
BEIJING SANKUAI ONLINE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

HDFS usually occupies a large amount of bandwidth in the computer room when reading and writing data, resulting in low read and write efficiency.

Method used

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  • Data reading method and device, electronic equipment and readable storage medium
  • Data reading method and device, electronic equipment and readable storage medium
  • Data reading method and device, electronic equipment and readable storage medium

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Embodiment Construction

[0073] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0074] refer to figure 1 , figure 1 It is a flowchart of a data reading method proposed by an embodiment of the present application, and the data reading method can be applied to the file distribution system HDFS.

[0075] refer to Figure 2A , Figure 2A It is a structural block diagram of an HDFS system, which includes: a management node NN, multiple data storage nodes DN, and multiple client clients. Wherein, the client client may be located in the same host as the ...

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Abstract

The embodiment of the invention provides a data reading method and device, electronic equipment and a readable storage medium. The method comprises the following steps: setting a machine room identifier for each data storage node DN in the HDFS, and setting a copy distribution attribute for to-be-backed-up data; determining a target machine room corresponding to the machine room identifier, and selecting a data storage node DN with the copy number from the target machine room; storing the data to be backed up in the selected DN; when a data reading request which is sent by a client and aims attarget data is received through an NN, sending DN identifiers of all DNs storing the target data to the client through the NN; determining whether the machine room identifier of each DN storing the target data is the same as the machine room identifier of the client through the client; and reading the target data from the target DN under the condition that the client determines that all the DNs comprise the target DN of which the machine room identifier is the same as the machine room identifier of the client.

Description

technical field [0001] The embodiments of the present application relate to the technical field of data processing, and in particular to a data reading method, device, electronic device, and readable storage medium. Background technique [0002] The file distributed system infrastructure Hadoop includes two important service systems, namely the file distributed system HDFS (Hadoop Distributed File System) and the resource management system YARN (Yet Another Recourse Negotiator). Among them, HDFS is based on a master-slave structure (master / slaver), including at least one management node NameNode (NN) as a master and multiple data storage nodes DataNode (DN) as slavers. Files written to HDFS are first divided into several file blocks, each file block is backed up into multiple copies, and each copy is stored in a DataNode. When HDFS reads and writes data, it usually occupies a large amount of bandwidth in the computer room, resulting in low read and write efficiency. Conte...

Claims

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Application Information

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IPC IPC(8): H04L29/08G06F11/14
CPCG06F11/1448G06F11/1451H04L67/1097
Inventor 刘俊宏万畅李建斌张世龙
Owner BEIJING SANKUAI ONLINE TECH CO LTD
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