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Method for managing metadata file layout of parallel file system

A file layout, file system technology

Inactive Publication Date: 2009-10-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Traditional distributed file systems such as NFS, AFS, etc. have been unable to meet the high scalability requirements of large-scale network storage systems; object-based file systems such as Lustre, PanFS etc. cannot meet the SAN application environment; the SAN file system that has appeared recently, such as GPFS, etc., its space management adopts a block-based allocation method

Method used

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  • Method for managing metadata file layout of parallel file system
  • Method for managing metadata file layout of parallel file system
  • Method for managing metadata file layout of parallel file system

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Embodiment Construction

[0072] The core of the invention is to reorganize the file layout requested by users by adding a file layout management module on the metadata server of the parallel file system. According to the request sent by the user, the extension blocks in the file layout are divided and merged. After the processing is completed, notify the disk space management module to allocate or reclaim space according to the processing result, and return a corresponding response to the request for subsequent operations.

[0073] The interface realized by the present invention includes the following two main parts:

[0074] 1. The interface part with the user request processing module. The interface with the user request processing module mainly includes three, namely layout_get, layout_commit, and layout_adjust. layout_get is used to obtain the layout of the file. The input parameters of the request are the starting position and length of the specified file. After being processed by the file layo...

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Abstract

A method for managing metadata file layout of a parallel file system belongs to the field of file system and is characterized in that the file system organizes the files by an extension block distribution way; after receiving a user request, a metadata server quickly carries out the operations of distribution, division, combination, release, and the like to the extension block in the corresponding file layout, thus achieving the requirements of the file layout on obtaining, submission or adjustment and realizing the optimum management to the file layout. The method adopts a principle of meeting the lowest requirement, responds to the request on the corresponding minimum extension block set, thereby meeting the simultaneous operation of multi-user on the same file to the maximum extent and improving the parallelism of the system; and simultaneously, the method adopts an extension block real-time combination strategy to ensure the maximum continuity of the file layout, optimizes the memory, reduces the seek time of the file layout and improves the performance of the file system.

Description

technical field [0001] A metadata file layout management method for a parallel file system belongs to the field of file systems, and in particular relates to the field of metadata management therein. Background technique [0002] With the rapid development of information technology, the amount of data that people have to deal with continues to increase, resulting in a huge demand for storage system capacity and performance, and traditional storage methods can no longer meet the needs of users. Generally, each host has its own storage device, which makes information scattered on each host, forming an information island, which is not conducive to information integration. Network storage can provide shared information access services, and has super large capacity and excellent performance, so it has become a development trend of storage systems. A storage area network (Storage Area Network, SAN) is a specialized storage network that can connect various storage devices together...

Claims

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Application Information

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IPC IPC(8): G06F17/30H04L29/08
Inventor 舒继武耿亮易乐天薛巍
Owner TSINGHUA UNIV
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