了解逻辑文件系统和虚拟文件系统。
Understanding the logical file system and the virtual file system.
逻辑文件系统接口支持UNIX类型的文件访问语义。
The logical file system interface supports UNIX-type file access semantics.
逻辑文件系统还负责管理内核的打开文件表和每个进程的文件描述符信息。
The logical file system is also responsible for managing the kernel's open file table and the per process file descriptor information.
逻辑文件系统层是一个抽象层，用户可以通过它请求各种文件操作，如读、写、获得相关信息，等等。
The logical file system layer is the level of abstraction at which users can request the various file operations, such as read, write, stat, and so on.
虚拟文件系统可以为物理文件系统、网络文件系统、或者逻辑文件系统(没有物理后备存储，如ramfs)。
A virtual file system can be a physical file system, a network file system, or a logical file system (one that does not have a physical backing store, such as ramfs).
虚拟文件系统建立了不同的基础物理文件系统到逻辑文件系统之间的桥梁，为操作系统中的其他部分提供了一致的目录树层次结构。
The virtual file system bridges the underlying disparate physical file system to the logical file system, providing a consistent directory tree hierarchy to the rest of the operating system.
虚拟文件系统建立了不同的基础物理文件系统到逻辑文件系统之间的桥梁，为操作系统中的其他部分提供了一致的目录树层次结构。
The virtual file system bridges the underlying disparate physical file system to the logical file system, providing a consistent directory tree hierarchy to the rest of the operating system.
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