dentry

dentry

美 　英

• 網絡目錄數據結構；目錄項對象；目錄入口

例句

The hierarchical nature of a file system is managed by another object in VFS called a dentry object.

文件系統的層次結構由VFS中的另一個稱為dentry的對象管理。

Multiple file objects may refer to the same dentry (as in the case of two users sharing the same file).

可能有多個文件對象引用同一個dentry（當兩個用戶共享同一個文件時）。

The root directory entry (dentry) object is cached here also, as is the block device on which this file system resides.

根目錄條目（dentry）對象也緩存在這里，因為它是文件系統所在的塊設備。

A file system will have one root dentry (referenced in the superblock), this being the only dentry without a parent.

文件系統有一個根dentry（在超塊中引用），這是唯一沒有父對象的dentry。

When a file is opened, the dentry cache is populated with entries representing the directory levels representing the path.

當打開一個文件時，dentry緩存將被表示目錄級別（目錄級別表示路徑）的條目填充。

Only file system inodes are stored permanently, where dentry objects are used to improve performance.

僅永久儲存文件系統inode，dentry對象的目的是改善性能。

This section explores the superblock, the index node (or inode), the directory entry (or dentry), and finally, the file object.

這個小節探索了超塊（superblock）、索引節點（或inode）、目錄條目（或dentry）和文件對象。

The two major objects that are dynamically managed in the VFS include the dentry and inode objects.

在VFS中動態管理的兩個主要對象是dentry和inode對象。

The file object refers to a dentry object, which refers to an inode.

file對象引用dentry對象，后者引用inode。

The name of the object is then defined, which is kept here in the dentry instead of the inode itself.

接著定義對象的名稱，在這里名稱保存在dentry中而不是inode中。

These objects are the superblock, inode, dentry, and file.

這些對象是超級塊（superblock）、inode、dentry和文件。

When a dentry object exists, an inode object will also exist in the inode cache.

如果存在一個dentry對象，那么inode緩存中也將存在一個inode對象。

From the implementation today, the dentry cache is the master of the inode cache.

在現在的實現中，dentry緩存支配著inode緩存。

Note that the dentry objects exist only in file system memory and are not stored on disk.

注意，dentry對象僅存在文件系統內存中，而不能儲存在磁盤上。

Lookups are performed on the dentry cache, which result in an object in the inode cache.

查找是在dentry緩存中執行的，這將導致inode緩存中出現一個對象。

The most-recently used inodes and dentries are kept in the inode and directory cache respectively.

inode和目錄緩存分別保存最近使用的inode和dentry。

A simplified view of the dentry object is shown in Figure 5.

圖5展示了dentry對象的簡化圖示。

Two caches exist for file system objects (inodes and dentries), which I'll define shortly.

有兩個針對文件系統對象的緩存（inode和dentry）。

Note that for each inode in the inode cache there is a corresponding dentry in the directory cache.

注意，對于inode緩存中的每個inode，在目錄緩存中都有一個對應的dentry。

In this way, dentries map cleanly into the hierarchical file systems in use today.

通過這種方式，dentry簡潔地映射到現在使用的文件系統。

As shown, a path structure provides reference to both the dentry and vfsmount.

在圖中可以看到，path結構提供到dentry和vfsmount的引用。

The operations for a dentry are then defined (consisting of operations such as hash, compare, delete, release, and so on).

然后，為dentry定義操作（比如hash、compare、delete和release等等）。

Note also in Figure 7 that a dentry object refers to another dentry object.

注意，在圖7中一個dentry對象還引用另一個dentry對象。