Have a new list option: Auto-cleanup. When  the logs of a list are bigger than
a  specified size,  a cleanup  routine runs  and erase  the older  logs, until
enough disk space is free. Then, resume the normal operation. Or, clean up the
logs of a  list when they are  older than a specified date.  The last solution
could cause  of course a  disk-full problem if the  list has big  traffic, but
with the proper use of date limit, the problem can be solved.
 
                                                Theodore Soldatos.