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Method and device for reading distributed metadata files

A metadata and distributed technology, applied in the field of metadata management, can solve problems such as manual monitoring and migration directory lag, and achieve the effect of avoiding hot spots, reducing heat, and reducing load pressure

Inactive Publication Date: 2017-11-03
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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Problems solved by technology

The disadvantage of this method is that the file stored in the directory of the smallest migration unit may be a hot data; in addition, manual monitoring and migration of the directory has a certain lag

Method used

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  • Method and device for reading distributed metadata files
  • Method and device for reading distributed metadata files
  • Method and device for reading distributed metadata files

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specific Embodiment approach

[0071] Based on the above embodiment, it is considered that if the files stored in the directory are too concentratedly stored in a directory fragment, the amount of files stored in the metadata node where the fragment is located is too large, and the metadata node still exists For certain hot issues, the present invention provides a specific implementation mode that can further improve the above-mentioned embodiments. The method may specifically include:

[0072] storing the files in each of the directory slices, and the number of the files in each of the directory slices is within a first preset range; the first preset range is based on the total number of files stored in the directory The number of said files is determined.

[0073] In order to prevent the files stored in the directory from being too concentratedly stored in a directory slice, the number of files stored in each directory slice can be adjusted within a preset range according to the total number of files in t...

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Abstract

The invention discloses a method for reading distributed metadata files. After a directory is created, the directory is split into multiple directory fragments, and the multiple directory fragments are migrated to multiple metadata nodes, files which need to be written into the directory are stored in all the multiple directory fragments, when the files are read, according to the corresponding relations of identification information of the files and the directory fragments, and the directory fragments and the metadata nodes, metadata nodes stored in the files are finally determined so as to read the files, the frequency of frequently accessing the metadata nodes in which hotspot directories are located is reduced to a certain degree, the degree of hotspot of the metadata nodes is lowered, the loading pressure of the metadata nodes is reduced, and the performance of a whole metadata management system is improved. The invention further discloses a device for reading the distributed metadata files, and the device has the above same advantages.

Description

technical field [0001] The invention relates to the field of metadata management, in particular to a method and device for reading distributed metadata files. Background technique [0002] Data in any file system is divided into data and metadata. Data refers to the actual data in ordinary files, and metadata is mainly information describing data attributes, used to support functions such as indicating storage locations, historical data, resource search, and file records. There are two ways of metadata management, centralized management and distributed management. Distributed management refers to storing metadata in any node of the system and can dynamically migrate it. Responsibility for metadata management is also distributed to various nodes. [0003] In a system with multiple metadata nodes, each metadata node has its own directory structure, and the newly created subdirectory belongs to the load of the metadata node to which the parent directory belongs. If the acces...

Claims

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Application Information

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IPC IPC(8): G06F3/06
Inventor 程瑶
Owner ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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