SYS V Rel 4, Virtual File Systems

[Conor P. Cahill]

In article <23299 at abcom.ATT.COM> brr at abcom.ATT.COM (Rao) writes:
>
>	The new release of AT&T SYS V, from what I have read in
>	the UNIX mags, allows for Virtual File Systems.
>
>	What is Virtual File Systems used for?

The Virtual File System is the System V R4 equivalent to the Sys V R3
File system switch.  I believe it originates in SunOS.

What it does is place a layer between the file system specific code
and the generic code in the kernel.  This makes it much easier to add
new file system types (like NFS, or UFS) since the file system independent
portion (above the VFS) does not need to be modified.


-- 
Conor P. Cahill            (703)430-9247        Virtual Technologies, Inc.,
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