On Tue, 2014-06-03 at 15:47 +0200, Ludwig Krispenz wrote:
> On 06/03/2014 02:53 PM, Simo Sorce wrote:
> > On Tue, 2014-06-03 at 14:15 +0200, Ludwig Krispenz wrote:
> >> Hi Simo,
> >>
> >> just for clarification. The plan is to move the repl config into the
> >> shared tree for the main database and eventually for others like
> >> o=ipaca. Should the topology info live in cn=etc for all databases or
> >> each in the database it configures ?
> >> If the main database is always replicated I think all topology info
> >> should be concentrated in cn=etc.
> > This is actually a good question, I think we want to keep it in the main
> > database, but to be forward looking, we should set the basedn of the
> > configuration (per topology) in the topology plugin configuration entry,
> > this way if it turns out we should move it in their own dbs we can just
> > do it.
> yes, this can be handle in the topology plugin configuration, we need to 
> define which databases should be controlled and where the root for the 
> replicated topology information is.
> I assume we want only one plugin instance.
> >
> > The other issue is the list of masters though. I do not want to move
> > them in the topology tree (breaks compatibility) nor duplicate those
> > entries if possible, but we may need to do it or also configure where
> > the "nodes" are stored.
> Agreed. What about non-masters, in the ticket there was also discussion 
> about read only replicas - to be delayed ?

TBD, from the pov of the plugin we care only about Nodes and links, but
yeah dealing with R/O replicas will mean the plugin should understand
such servers need a segment that sends data to them but do not need a
segment that carries data out.

Working on the topology consistency checker will be fun :-)

Simo.

-- 
Simo Sorce * Red Hat, Inc * New York

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