elmo-cache-expire-by-size

[David Abrahams <dave@boostpro.com>]

The existing description is: 

    The command deletes cache files to the specified size by the order of last accessed time.

If I understand correctly what this command does, it would be more
accurate to say:

    The command repeatedly deletes the least-recently used cache files
    until the cache occupies the specified number of kilobytes on
    disk.

First, is that accurate?

If so, the command name is misleading.  It gives the impression that
which files are deleted is determined by the size of the files.
Actually, I think using the word “expire” here is also misleading,
since it is already a term of art when applied to messages.  I'd
rather see this command called

    elmo-cache-flush-to-size

or

    elmo-cache-reduce-to-size

-- 
Dave Abrahams
BoostPro Computing
http://www.boostpro.com