You can specify multiple mounts using a single entry in a direct or indirect map, where the mounts can be from different locations and with different mount options. In the sample map, as follows
/usr/local \ /bin -ro,soft ivy:/export/local/sun3 \ /share -ro,soft ivy:/export/local/share \ /src -ro,soft ivy:/export/local/src /usr/man -ro,soft oak:/usr/man \ rose:/usr/man \ willow:/usr/man /usr/fun -ro,soft peach:/usr/games /var/spool/news -ro,soft pine:/var/spool/news /usr/frame -ro,soft redwood:/usr/frame1.3 \ balsa:/export/framethe first entry (which is actually one long entry whose readability has been improved by splitting it into three lines) mounts /usr/local/bin, /usr/local/share and /usr/local/src from the server ivy, with the options ``read-only'' and ``soft.'' The entry could also read:
/usr/local \ /bin -ro,soft ivy:/export/local/sun3 \ /share -rw,secure willow:/usr/local/share \ /src -ro,intr oak:/home/jones/srcwhere the options are different and more than one server is used.
Multiple mounts can be hierarchical. When resources are mounted hierarchically, each resource is mounted on a subdirectory within another resource. When the root of the hierarchy is referenced, the automounter mounts the entire hierarchy. The concept of root here is very important. In the case of a single mount, there is no need to specify the root of the mount point, because it is assumed that the location of the mount point is at the mount root or /. When mounting a hierarchy, however, the automounter must have a mount point for each mount within the hierarchy. Refer to ``Example: hierarchical mounting'' for an illustration of a true hierarchical mounting.
The following code shows a true hierarchical mounting.
/usr/local \ / -rw,intr peach:/export/local \ /bin -ro,soft ivy:/export/local/sun3 \ /share -rw,secure willow:/usr/local/share \ /src -ro,intr oak:/home/jones/srcThe mount points used here for the hierarchy are /, /bin, /share, and /src. Note that these mount point paths are relative to the mount root, not the host's filesystem root. The first entry in the example above has / as its mount point. It is mounted at the mount root. There is no requirement that the first mount of a hierarchy be at the mount root. The automounter will issue mkdir commands to build a path to the first mount point if it is not at the mount root.