Yeah that's what i mean, that for a sort of append-only cache where a garbage collector kicks in to remove old entries (<-- the part i forgot to mention), the d

Yeah that's what i mean, that for a sort of append-only cache where a garbage collector kicks in to remove old entries (<-- the part i forgot to mention), the directory size will in fact grow forever. I must say that came as a surprise to me (i've used this pattern more than once, but never with millions of files), so thanks for telling me!