Force Postgres to create new timeline

Question

I have two servers that are slightly different. I want to use pg_rewind to make the two databases the same. I was told that it works when you do promote since postgres creates new timeline. However in my case the two databases are already "masters". Is it possible to tell postgres to create new timeline and then execute pg_rewind

Thanks Avi

Answer 1

Judging from your question, the answer seems to be that you can't accomplish what you want.

If these are two distinct servers, both primarys, so they accept data changes, even if you restored the same initial backup, they will not be able to stream one from the other (if that's what you want to accomplish - make one a standby of the other).

Maybe you could expand a bit, because based on what I read above, that's not possible with postgres.