[Samba] samba PDC and BDC with ldap master and slave backend

[Jérôme Tournier]

Hi all !
In the samba-Howto, i was looking on informations on how to set up
both a samba PDC and a samba BDC controller with ldap backend.
I can read:
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Do not install a Samba PDC on a OpenLDAP slave server...
Possible PDC/BDC plus LDAP configurations include:
. PDC -> LDAP master server, BDC -> LDAP slave server.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

And now i am wondering this questions :
. if the samba DBC contain the following configuration
  => passdb backend = ldapsam:"ldap://slave.quenya.org ldap://master.quenya.org"
  will samba store informations in the master ldap server or will it fail ?
  Or is it necessary to put the master ldap server first like this :
  => passdb backend = ldapsam:"ldap://master.quenya.org ldap://slave.quenya.org"
. can i install a samba BDC with a ldap slave server ? Yes you will answer me
  but in the case where the master ldap server is unreachable, where does
  the samba BDC will store new informations (Machine Trust Account password
  for example wich are periodically changed)

Thanks for any precision :)
--
Jérôme