PDC acceptance criteria

Steve Langasek vorlon at netexpress.net
Tue Oct 3 22:20:45 GMT 2000

On Tue, 3 Oct 2000, Gerald Carter wrote:

> > Inter-domain trust relationships are nice, but there 
> > are many people who *need* PDC->BDC replication before they 
> > can sell this to their supervisors, because a
> > solution without built-in redundancy would be
> > unacceptable.  Moreover, it would give Samba-as-PDC a bad 
> > name right off the bat if people start having 
> > reliability problems -- even if the problems aren't 
> > directly the fault of Samba, the fact that a Samba PDC 
> > can't be deployed with the same degree of
> > redundancy as an NT PDC is bound to earn poor marks.

> Let me rephrase that then...Is PDC<->BDC integration with
> NT server required?  Or can people just say this is a 
> Samba domain.  It is a trivial thing to replicate a smbpasswd
> among servers.  Once LDAP support is in place, we can
> just point all samba servers in a domain to that.

It is trivial to replicate the smbpasswd file between servers; but what tools
are you going to ship with Samba to facilitate this?  Samba has been ported to
such a wide range of platforms that the only guarantee you have about your
server's facilities is that it supports SMB. :)  That being the case, it seems
to me that the easiest failover method to implement would be the one that
already uses SMB, namely the NT PDC->BDC replication mechanism.  The
protocol's already been reverse-engineered; people are going to want support
for it eventually anyway; why spend time designing (or incorporating) another
secure method for mirroring the smbpasswd file?

> My point about domain trusts is that the master 
> domain / resource domain setup is quite common I think.
> Maybe I'm wrong.

It's not a familiar configuration to me, but what do I know? :)

Steve Langasek
postmodern programmer

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