Client->Server bandwidth < Server->Client bandwidth?

[Gabriel Kerneis <gabriel@kerneis.info>]

Hi,

I have a question about daily bandwith usage.  On my admin interface, I see:

    Server->Client ≃ 3.7 × Client->Server

I wonder if this expected, considering that I am only creating (and deleting in
a round-robin manner), never restoring archives.  I am slightly surprised that
the amount of control data would be so large, but this is just a naive question,
I didn't study tarsnap source code.  Could this indicate an issue with my local
cache?

Best regards,
-- 
Gabriel