Paul Bijnens wrote:

Look for a few large subdirectories, and make a separate
DLE for those.  Then group the other ones in meaning parts using
globbing (only the one level deep!!!).  Make sure the globs cover
all names, even the one that don't exist yet.

See the last example in examples/disklist in the source tarball.

How does this affect amrecover?

hosta /diskA/all /diskA {
       # all directories except the one that start with [a-u]
       high-tar
       exclude "./[a-u]*"
       } 1
hosta /diskA/ag /diskA {
       # all directories that start with [a-g] except big1 and big2
       high-tar
       include "./[a-g]*"
       exclude "./big1" "./big2"
       } 1