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Method, device and system for having access to information through metadata

A technology for accessing information and metadata, applied in the field of communication, can solve problems such as metadata server performance bottlenecks, and achieve the effect of avoiding single point failure problems and solving performance bottlenecks

Inactive Publication Date: 2014-11-12
CHINA TELECOM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By expanding a single metadata server into a metadata server cluster, the problem of single point of failure is effectively avoided, and the performance bottleneck of the current distributed file system metadata server is solved.

Method used

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  • Method, device and system for having access to information through metadata
  • Method, device and system for having access to information through metadata
  • Method, device and system for having access to information through metadata

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Embodiment Construction

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0054] The relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0055] At the same time, it should be understood that, for the convenience of d...

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Abstract

The invention discloses a method, device and system for having access to information through metadata. The method for having access to information through the metadata comprises the steps that an inquiry request is sent to an access server, wherein the access server is any metadata server in a metadata server cluster; after the access server receives the inquiry request, whether metadata of an assigned file exist locally or not is judged, if the metadata of the assigned file exist locally, the metadata of the assigned file are obtained from the local, and if not, the metadata of the assigned file are obtained from a corresponding metadata server with the assigned file metadata; the assigned file metadata sent by the access server are obtained, and data blocks of the assigned file are read from a data node closest to the local according to the data node address information of the metadata. The single metadata server is expanded into the metadata server cluster, and therefore the single-point fault problem is effectively avoided, and the performance bottleneck of existing distributed file system metadata servers is broken.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and system for using metadata to access information. Background technique [0002] The cloud computing distributed file system uses multiple servers to provide large-capacity and highly reliable file services. The cluster includes data servers (data nodes) and directory servers (ie metadata servers). The directory server is used to maintain the distribution of file data blocks in the data server (metadata), and the data server is used to store specific file data. [0003] At present, in the distributed file system, files are stored in the form of data blocks (Block). The typical architecture is a centralized architecture. The system consists of a metadata server (NameNode) and multiple data nodes (DataNodes). The data server is responsible for storing the mapping relationship between file names, file directories, file attributes, data blocks and storage nodes (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L29/08H04L12/24G06F17/30
Inventor 蔡康冯明丁圣勇唐宏金华敏刘式颖吴跃华张文强
Owner CHINA TELECOM CORP LTD
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