> On Oct 22, 2008, at 11:34 PM, James Harper wrote:
> 
> >>
> >> I would like to understand the way data flows in Bacula a bit
better.
> >> Does the user data that is being backed up flow straight from the
SD
> > to
> >> the FD? Or does the SD send the data to the director, and the
> >> director
> >> then sends the data on to the FD?
> >>
> >> The reason I'm asking is that I would like to set up bacula to back
> >> up
> >> data locally on another site. Basically, I would like the director
to
> > be
> >> on a computer in, say, San Diego, and both the SD and FD would be
on
> > the
> >> same local network in, say, Los Angeles. The same director should
> >> also
> >> be able to control a similar SD/FD combination in Miami, New York
and
> >> Seattle.
> >>
> >> Obviously, that's not practical if all data has to flow over the
> >> Internet and through the director, but if the director only
exchanges
> >> control information with SD and FD, it might be very practical.
Thus
> > my
> >> question.
> >>
> >
> > The Director tells the SD to expect a connection from the FD, '
> 
> I am not sure about that.

I am. The FD receives a key from the DIR (not sure if the DIR generates
the key and gives it to the SD too, or if the SD has given the key to
the DIR). Either way, the DIR has previously contacted the SD telling it
about the job and the SD is expecting a connection from the FD and
expecting the FD to authenticate with it using the key given to it by
the DIR.

> 
> > and the FD
> > connects directly to the SD for the purposes of sending backup data.
I
> > think attributes (file information) are then sent from the SD back
to
> > the Director for each file backed up.
> 
> 
> The DIR contacts the FD and gives it the FileSet and the SD that it
> should contact.
> 

Yes.

James

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