Comment 3 for bug 1301728

yeah but that will also rehashes all directories all the time... the setdefault is intentional - it the whole point - don't traverse directories that haven't had any activity since the last replication pass. But if that goes on for a long time...

I think either the hash.pkl can get updated to maybe include also a timestamp next to the hash, so that come reclaim age these really inactive suffixes can go ahead and get swept out, or have something that notices reclaim-aged objects (like the auditor) call invalidate_hash.

Anyway, I don't think just hashing all the directories all the time is gunna work how how we want...