Write/read document operation method applied in multi-copy data grid system

A data grid and file writing technology, which is applied in the transmission system, user identity/authority verification, electrical components, etc., can solve the problems of file writing operation performance degradation, system crash, data node overload, etc., to facilitate file operation services, The effect of improving performance

Inactive Publication Date: 2008-07-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When frequent write operations are performed on a file, the data node storing the master copy file may be overloaded, resulting in a sharp decline in the performance of file write operations, and even system crashes

Method used

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  • Write/read document operation method applied in multi-copy data grid system
  • Write/read document operation method applied in multi-copy data grid system
  • Write/read document operation method applied in multi-copy data grid system

Examples

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Embodiment Construction

[0040] The implementation steps of the method for writing a file operation by accessing the client in the present invention are as follows:

[0041] 1. The user submits a file writing request to the access interface module of the access client of the access client, and the request includes the identifier of the file to be written, the data to be written, and the starting offset and length of the data segment to be written;

[0042] 2. After the access interface module simply encapsulates the file write request, it is handed over to the view request module, which requests the view information required for the write operation from the metadata server;

[0043] 3. The metadata server performs simple authentication on the request. If the authentication is not passed, an error message will be returned to the access client; if the authentication is passed, it will transfer to the server distance comparison module, estimate and select the copy storage server closest to the user;

[004...

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PUM

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Abstract

The invention discloses a method used for the document reading/writing operation of multi-copy data grid system, which belongs to the operational field of high speed document writing. The invention is characterized in that the following steps are sequentially included: the user puts forward a writing document request to the copy access client terminal; after the identity is successfully authenticated by a metadata server, a server distance comparison module selects a copy storage server that is nearest to the user in logic distance, and selects the corresponding copy view information, and after confirmed by a view analytical module of the copy access client side as effectiveness, a reading and writing execution module of the copy access client sends data writing request to the copy storage server; after the copy storage server successfully executes writing operation, a copy view updating module of the metadata updates the copy view. The invention leads the user to select the nearest copy storage server to execute writing operation, meanwhile, the normal reading operation of the user is guaranteed.

Description

technical field [0001] The invention relates to the file operation in the data grid system, in particular to the high-speed write file operation in the multi-copy data grid system. Background technique [0002] Data grid systems widely use data copy technology to improve the performance of file operations, that is, multiple file copies are stored in different data nodes, including a rewritable master copy file and multiple read-only copy files. For the file read operation, in general, the user can manually select the nearest copy file for the read operation, or the resource scheduler in the data grid automatically assigns the user a copy file with low communication overhead for the read operation. For file writing operations, data is generally written to the master copy file. The master copy file is the only rewritable copy file. After the master copy file is updated, other read-only copy files will be automatically updated synchronously or asynchronously. [0003] It can b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L29/06H04L9/32
Inventor 郑纬民武永卫徐鹏志杨广文
Owner TSINGHUA UNIV
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