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Distribution type file system dummy directory and name space implementing method

A technology of distributed files and virtual directories, applied in the field of realization of virtual directories and namespaces of distributed file systems, can solve the problems of lack of consistency check of file systems and handling of conflicts, so as to resolve name conflicts and resolve them correctly. the effect of ensuring consistency

Inactive Publication Date: 2008-05-28
ZHEJIANG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

In the distributed virtual file system, the system needs to deal with multi-user concurrent operations such as deletion, recovery, copying, and renaming, and there is a lack of file system consistency checks and conflict handling

Method used

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  • Distribution type file system dummy directory and name space implementing method
  • Distribution type file system dummy directory and name space implementing method
  • Distribution type file system dummy directory and name space implementing method

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Experimental program
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Embodiment Construction

[0015] The present invention will be further introduced below in conjunction with the drawings and embodiments:

[0016] 1.1 Basic concepts of metadata

[0017] In a distributed file server, metadata is used to describe the basic information of files and folders in the virtual file system. Metadata can be divided into file metadata and folder metadata. For file and folder operations, you need to obtain metadata from the metadata server first, and then complete related virtual file system operations.

[0018] File and folder metadata are uniformly stored in the database. The metadata includes the virtual file ID, file name or directory name, creation time, last modification time, whether it is deleted, whether it is a directory, whether the transfer is complete, file size, Document version number, parent node ID, and description attribute values, etc. The metadata of the files on the Master is shown in the table below. The information on the Slave has more than the Master’s file si...

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Abstract

The invention relates to a distributed file system virtual catalog and the implementation of a naming space. A primary server creates a uniform virtual catalog in the whole storage network, takes the concrete information of each file in store, and makes a mapping for the actual storage position of the file and the address in the virtual catalog, as well as shields the difference among hardware, an operation system and a file storage structure; in view of a client, the client does not know where the file is stored, the file in the whole system is seen to be stored in a uniform way without any difference from a common file system, namely, the system is a virtual file system; a secondary server stores the relevant information of the file stored on the secondary server, thereby forming an own file system. The invention has the advantages that the operation of the user is convenient through the system virtual catalog, and the file storage is transparent for the user. The consistency when a plurality of users access the file together is ensured through the chain-type operation of the naming space, thereby solving the problem of name collision, and obtaining good effect.

Description

Technical field [0001] The invention relates to the field of file operation and file directory management, and is mainly a method for implementing virtual directories and name spaces of a distributed file system. Background technique [0002] The distributed file server is composed of a master server (called Master) and several slave servers (called Slave). The slave server is used to store specific files and the master server is used to coordinate and manage each slave server. Files can be stored on multiple different slave servers, so that large-scale file storage can be realized. However, because the files are distributed on different slave servers, it is inconvenient to manage and user operations are very inconvenient. In order to solve this problem, the main server establishes a unified virtual directory in the entire storage network, maps the actual storage location of the file and the virtual path of the file in the virtual directory, and shields the differences in hardwar...

Claims

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Application Information

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IPC IPC(8): G06F17/30G06F9/46
Inventor 尹建伟苏艳森邓水光吴健李莹吴朝晖
Owner ZHEJIANG UNIV
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