System Administration Guide: Devices and File Systems
ProcedureHow to Mount a CacheFS File System (autofs)  You can
mount a file system in a cache with autofs by specifying the
-fstype=cachefs mount option in your automount map. Note that
the CacheFS mount options, for example, backfstype and cachedir,
are also specified in the automount map.  For details on
automount maps, see Task Overview for Autofs Administration in
System Administration Guide: Network Services or automount(1M).
1. Become superuser on the client system.    2. Using an editor,
add the following line to the auto_direct map:      /mount-point
-fstype=cachefs,cachedir=/directory,backfstype=nfs    3. Using
an editor, add the following line to the auto_master map:
The /- entry is a pointer to check the auto_direct map.    4.
Reboot the system.    5. Verify that the entry was made
correctly by changing to the file system you mounted in the
cache, and then list the contents.      # cd /filesystem     #
ls  Example 19–4 Mounting a CacheF