I've done this. It works fine. Make sure you install the slony extensions on Old B and New B in the event you need to fail over to one of the B nodes.
> On Feb 22, 2017, at 6:52 PM, Steve Singer <st...@ssinger.info> wrote: > > I can't think why it wouldn't work. You should be able to do streaming > replication from a slony subscriber. > > I have not tried a similar setup myself > > Zarko Aleksic wrote: >> Greetings everyone, >> >> We've recently started considering Slony for purpose of migrating PostgreSQL >> from old physical server to a new virtualized and "updated" platform. So >> far, all our tests worked quite well. However, I'm having trouble finding >> any documentation to prove or disprove that the following scenario is >> supported and/or will work properly (initial testing was positive though). >> >> We would like to setup streaming replication between future Slony subscriber >> and our DR site beforehand, ie. before we introduce Slony. This would save >> us time and additional work post migration. >> >> It would look something like this: >> "New B" (disaster recovery site) <---- Streaming replication ---- "New A" >> <--------Slony replication ----- "Old A" ------ existing SR ------> "Old B" >> (DR site) >> Streaming replication between "New A" and "New B" would be setup first >> Then we would setup Slony replication between "Old A" and "New A" >> Slony replication Set would be moved from "Old A" to "New A" >> Slon process would be stopped and Slony Schema would be removed >> Has anyone done something similar? Are there potential downsides to this >> idea? >> >> We are using slony1-91-II-2.1.4 and Postgres 9.1 on RHEL 6, later we will >> most likely do the same type of migration from 9.1 to 9.5. >> >> Any response is greatly appreciated. >> Thanks! >> Zarko >> > Sent Using Firefox OS > _______________________________________________ > Slony1-general mailing list > Slony1-general@lists.slony.info <mailto:Slony1-general@lists.slony.info> > http://lists.slony.info/mailman/listinfo/slony1-general > <http://lists.slony.info/mailman/listinfo/slony1-general>
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