Re: AW: Partitioning questions II

[Oliver Egginger <Oliver.Egginger@mni.fh-giessen.de>]

The topics discussed here are covered in
"Understanding and Deploying LDAP Directory Services" 
ISBN: 1-57870-070-1

Messages from 19 June 2001 14:38:
> On Mon, 18 Jun 2001, Dan Shriver wrote:
> > From: Tiefnig Daniel <daniel.tiefnig@infonova.at>
> > My understanding is that if you want to add/remove/modify
> > entries you have to go through the master?  Am I wrong here?
>
> No.  What you are missing is that each partition is embodied in a master
> and zero or more slaves.  If you have partitioned your tree then you have
> more than one master, even though each is master *only* of its own
> partition.
>
> > In any case, the design I'd like would have one "master" who
> > deals with all such requests and if it doesn't own the entry (a
> > delegated subtree ("partitioning")) it adds the entry to the
> > appropriate slave.  I understand that in a normal case it adds
> > the entry to itself and then replicates down to the slave, but
> > shouldn't it be using a similar mechanism (following the
> > referral and doing an action similar to replication on the
> > appropriate slave)?
> >
> > I'm stuck in a "chicken and egg" problem here.
>
> It is a problem of your own making.  Once you give up the notion that an
> inferior server is a slave, it should all become clear.  One of the
> inferiors must be a master, and that is the server which receives updates
> on behalf of its partition.
>
> [snip]
>
> > Obviously I am very confused, but I don't have another
> > conceptual model to use here.  How are things supposed to work?
> > Is there a good reference for how I should be looking at this
> > problem?
>
> See _Understanding LDAP_ (IBM, SG24-4986-00, I think you can find it at
> redbooks.ibm.com) section 2.2.2.2 (Suffixes and referrals).  Also Novell
> has a huge volume of NDS documentation online
> (http://www.novell.com/documentation/Ig/nds73/docui/index.html, for
> example), and their explanations and diagrams are good.  And of course for
> OpenLDAP you should study the Administrator's Guide.

-- 
Oliver Egginger
FH Giessen-Friedberg
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Mail: Oliver.Egginger@mni.fh-giessen.de