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Wildcard names & Replicated Servers
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By using the wildcard facility, Amd can "overlay" an existing
directory with additional entries. The system files are usually
mounted under `/usr'. If instead Amd is mounted on `/usr', additional
names can be overlayed to augment or replace names in the "master"
`/usr'. A map to do this would have the form:
local type:=auto;fs:=local-map
share type:=auto;fs:=share-map
* -type:=nfs;rfs:=/export/exec/${arch};sublink:="${key}" \
rhost:=fserv1 rhost:=fserv2 rhost:=fserv3
Note that the assignment to `${sublink}' is surrounded by double
quotes to prevent the incoming key from causing the map to be
misinterpreted. This map has the effect of directing any access to
`/usr/local' or `/usr/share' to another automount point.
In this example, it is assumed that the `/usr' files are replicated
on three fileservers: `fserv1', `fserv2' and `fserv3'. For any
references other than to `local' and `share' one of the servers is used
and a symbolic link to ${autodir}/${rhost}/export/exec/${arch}/whatever
is returned once an appropriate filesystem has been mounted.
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