Virtualizing File Systems
A virtual file system is an abstraction layer that allows client applications using heterogeneous file-sharing network protocols to access a unified pool of storage resources. These systems are based on a global file directory structure that is contained on dedicated file metadata servers. Whenever a file system client needs to access a file, it must retrieve information about the file from the metadata servers first (see Figure 8-15).
Figure 8-15 File System Virtualization
The purpose of a virtual file system (VFS) ...
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