Method and system of file access

Abstract

Provided are a file access method and system. The method includes: a file system drive module receiving a first access request sent by an upper layer application; the file system drive module converting the first access request into a second access request suitable for accessing a key value database according to the correlation between an access interface corresponding to the upper layer application and an access interface of the key value database; the file system drive module sending the second access request to a client of the key value database; the client of the key value database searching for a corresponding file content or directory entry content or file attribute or directory entry attribute from a key value database stored at a server end of the key value database according to the second access request. As compared to the technical solution in the prior art that a POSIX file system accesses metadata layer by layer, the technical solution in the embodiments of the present invention is small in access overhead and high in access efficiency.

Description

Technical field [0001] The embodiments of the present invention relate to the field of computer technology, and in particular to a file access method and system. Background technique [0002] In the prior art, a file system similar to Portable Operating System Interface for Unix / Linux (POSIX) includes metadata and data; the metadata part includes file nodes ( inode) information, which composes a specific data structure (such as a multipath search tree, etc.). The data part includes file content. The POSIX file system can provide a POSIX interface to upper-level applications. Each directory and file in the POSIX file system has a corresponding file node (inode). The file node contains information such as the size of the file, creation and modification access time, permission attribution, and the address information of the file content in the data part. For larger files, the distribution of the data part on the file system may be discontinuous, and may be composed of several dif...

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Problems solved by technology

[0003] When storing files in the above-mentioned POSIX file system, when there are many files stored in the file system, and the directory depth corresponding to a file to be accessed is relatively deep, when accessing the file, it is necessary to access the metadata layer by layer according to the file storage path. Until the file to be accessed is accessed, the access overhead is large and the access efficiency is low

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