slapd slave limitations?

[Andreas <andreas@conectiva.com.br>]

I'm looking for some input from people who have deployed
openldap in a configuration with many slaves.

Specifically, a situation with, for example, a main office and several dozens
branch offices interconnected with WAN links.. Since there will be no
administration done at each branch office, I was initially thinking about a
single master server at the main office and a slave server at each branch. The
slave server would handle local traffic, sparing the WAN link as much as
possible.

But this would mean several dozens of slaves for this single master
slapd server. Is this feasable with openldap? On the other hand,
can openldap (slapd) replicate to, say three slaves, and let
each of these slaves replicate to other slaves? Or is there
some other alternative with openldap?

Thanks.