Millions of small files: best filesystem / best options

[Alessio Focardi]

> ZFS will work but its metadata size requirements will likely be twice
> the amount required by the actual file data.  It is not necessary to
> change the ZFS blocksize in order for it to work.

So if I understand correctly you are suggesting that I use as few directories as possible to save space (less metadata for them), but still a single file will weight more in metadata than it's size?

That suggests that I cant have no metadatata suballocation, in any case. Correct? So ... what's the size of metadata for a regular file, even empty? A full block?

Really tnx!