O'Reilly logo

Operating Systems: Concurrent and Distributed Software Design by Tim Harris, Jean Bacon

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

6.3. File and directory structure

As far as the file storage service is concerned, the objects it stores (files) are unstructured sequences of bytes. The filing system must be able to identify each file uniquely in the filing system and, to achieve this, will associate an identifier with a given file (we shall call this the system-file-identifier, SFID).

A directory is a structured object and comprises a list of entries, each of which associates a text name with information on the named object, including its SFID. The directory service will use the storage service to store directories. A directory is therefore given a SFID by the filing system. This is discussed further in Section 6.4, and Figure 6.4 gives an example of a directory object with ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required