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ndbm maps
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An ndbm map may be used as a fast access form of a file map. The
program, `mk-amd-map', converts a normal map file into an ndbm database.
This program supports the same continuation and comment conventions that
are provided for file maps. Note that ndbm format files may *not* be
sharable across machine architectures. The notion of speed generally
only applies to large maps; a small map, less than a single disk block,
is almost certainly better implemented as a file map.
ndbm maps do not support cache mode `all' and, when caching is
enabled, have a default cache mode of `inc' (*note Automount
Filesystem::.).
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