File system based on nonvolatile memory and Java virtual machine and design method thereof

Abstract

The invention provides a file system based on a nonvolatile memory and a Java virtual machine and a design method of the file system, and relates to the technical field of file system design, the file system comprises a file system calling module: the Java virtual machine modifies an actual implementation mode on the premise that a file calling interface used by a user is not modified, and the file system calling module is used for calling a file; data file processing is carried out by calling the file management module of the next layer; the file management module is used for storing file description information in the form of a hash table, finding corresponding file description information through a unique file path name and address mapping of file data, analyzing data content stored in a nonvolatile memory through the file description information, and reading and writing; and the data file storage module is used for storing a data format which can be identified by the Java virtual machine in a nonvolatile memory. According to the method, the data format conversion and operation environment switching overhead in the file system calling process can be eliminated, the delay of data persistence in Java application is reduced, and the access throughput of the Java application is increased.

Description

technical field [0001] The invention relates to the technical field of file system design, in particular to a file system based on non-volatile memory and Java virtual machine and a design method thereof. Background technique [0002] Reading and writing files is an important means for Java applications to achieve data persistence, and all data persistence operations in the application are implemented through the file system. Therefore, the file system is an indispensable low-level support for Java applications. The traditional file system provides a very diverse file access method. The interface and implementation of these methods are based on the C and C++ languages. The abstraction of the virtual machine (Java Virtual Machine, JVM) proposed by Java reduces the burden on users and makes the Users can focus on the program logic itself, and encapsulate a series of complex and trivial tasks such as data conversion and file management in the persistence process, resulting in ...

AI Technical Summary

Problems solved by technology

However, because the process of calling file system functions in Java involves high cost of data format conversion and operating environment switching, the current file read and write operations of Java programs cannot make full use of the advantages provided by non-volatile memory to reduce time overhead.

In addition, although there are currently technologies that directly store data in Java in non-volatile memory without format conversion, such as PJH (Persistent Java Heap), the interface provided by this type of technology is not the same as the original file system. The interface is not compatible, resulting in the need to modify a large number of Java application logic, adding an additional burden to application developers

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