On 06/03/2014 05:59 PM, Simo Sorce wrote:
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.
my question was more where the r/o replicas would be listed. In cn=ro-replicas parallel to cn=matsters,
or should all servers be in cn=masters and have a replication role defined ?

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

Simo.


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