On Sat, Oct 12, 2024 at 07:01:31AM +0200, Laurenz Albe wrote: > On Fri, 2024-10-11 at 15:53 -0700, Paul A Jungwirth wrote: > > Our docs seem to contrast "streaming replication" to logical, but > > these are not really opposites. Sometimes when they say "streaming" > > they mean "physical". > > > > Probably this is historical: at first physical replication was the > > only kind of streaming we had. > > > > Personally this has caused me a lot of confusion. For example, > > recently when I read "Synchronous replication (see Section 26.2.8) is > > only supported on replication slots used over the streaming > > replication interface," I took it to mean synchronous replication only > > worked for physical replication, not logical. > > What you are saying makes a lot of sense, and improving some of this > is a good thing. > > Our current trminology is a mess. There are some places in the documentation > that speak of physical vs. logical replication, while most places use the > term "streaming replication" for physical replication. I myself consequently > speak of "streaming replication" vs. "logical replication", even though both > stream data. The protocol section of the documentation describes the > "streaming replication protocol" and the "logical streaming replication > protocol". > > This is confusing, and I am also sometimes confused in the way you described > above. > > I think the mess is too well established to be really cleaned up. But adding > some clarity is a good thing, so +1.
I don't think our current setup is sustainable so I think it does need to be cleaned up. Also, physical/logical replication slots also needs help, I think. -- Bruce Momjian <br...@momjian.us> https://momjian.us EDB https://enterprisedb.com When a patient asks the doctor, "Am I going to die?", he means "Am I going to die soon?"
