Method and system for opening and closing file locally through client side based on catalogue authorization

Abstract

The invention discloses a method and system for opening and closing a file locally through a client side based on catalogue authorization and relates to the technology for optimizing the access performance of small files in a cluster file system. The method comprises the steps of conducting authorization, wherein a server gives the expanding and reading authority to the client side based on the catalogue expanding and reading authority mechanism and sends catalogue information and the expanding and reading authority to the client side, and the client side stores the catalogue information in a local reading cache; opening the file, wherein the client side establishes the catalogue item structure of the file and the index node structure of the file according to the catalogue information, makes the catalogue item structure and the index node structure be associated with the opening structure of the file, and adds the opening structure of the file to the course opened-file table; closing the file, wherein the opening structure of the file in the course opened-file table is removed and released. By the adoption of the method for opening and closing the file locally through the client side based on catalogue authorization, the access efficiency of small files can be optimized, and the access load of metadata of the server can be reduced.

Description

technical field [0001] The invention relates to an optimization technology for small file access performance in a cluster file system, in particular to a method for locally opening and closing files at a client based on directory authorization. Background technique [0002] At present, the access performance of massive small files has become a research hotspot and difficulty in the field of cluster file system. The main factor affecting the access performance of massive small files is the high proportion and high concurrency of metadata synchronous access. The network interaction overhead caused by metadata synchronous access makes the The delay of small file access operation is too large, which seriously affects the system performance. [0003] In the existing system, in order to ensure correct sharing semantics, it is necessary to maintain the state of metadata on the client and the server respectively. The current mainstream distributed file systems (including pNFS, CEPH,...

AI Technical Summary

Problems solved by technology

However, this invention aims at the problem of application deployment, and proposes a distributed deployment method and system based on IO decoupling, which transfers the function calls of the display and IO parts to the client for local execution, and does not involve files in the distributed file system. How to open and close

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