Bazaar traffic during commit

[Eli Zaretskii]

> From: Óscar Fuentes <ofv at wanadoo.es>
> Date: Fri, 19 Feb 2010 20:04:29 +0100
> 
> Eli Zaretskii <eliz at gnu.org> writes:
> 
> > I just committed 2 files whose combined size is 32KB from a bound
> > branch to the Emacs repository, and Bazaar showed that it moved 4.5MB
> > through the wire (we are still using SFTP, so I have nothing better to
> > do than watch the bytes move ;-).
> >
> > Is this expected?  What are those megabytes?
> 
> As explained here on the past, while aggregating your commits a
> threshold was surpassed and bzr repacked some part of the remote
> repository.

Why would repacking a _remote_ repository cause traffic from the
client to the server?  Isn't it the server who does the repacking in
this case?