Hierarchical Mounting in NFS
When multiple layers are defined in the automounter files, the mount process becomes more complex. Suppose that you expand the /etc/auto_shared
file from the previous example to contain the following:
# share directory map for automounter # ws / gumbo:/export/share/ws /usr gumbo:/export/share/ws/usr
The mount process is basically the same as the previous example when the /share/ws
mount point is accessed. In addition, a trigger node to the next level (/usr
) is created in the /share/ws
file system so that the next level can be mounted if it is accessed. In this example, /export/share/ws/usr
must exist on the NFS server for the trigger node to be created.
Caution:
Do not use the-soft
option when specifying hierarchical layers. For more information, see Autofs Unmounting.