At Wed, 25 Aug 2021 20:20:04 -0400, "alvhe...@alvh.no-ip.org" <alvhe...@alvh.no-ip.org> wrote in > BTW while going about testing this, I noticed that we forbid > pg_walfile_name() while in recovery. That restriction was added by > commit 370f770c15a4 because ThisTimeLineID was not set correctly during > recovery. That was supposed to be fixed by commit 1148e22a82ed, so I > thought that it should be possible to remove the restriction. However, > I did that per the attached patch, but was quickly disappointed because > ThisTimeLineID seems to remain zero in a standby for reasons that I > didn't investigate.
On a intermediate node of a cascading replication set, timeline id on walsender and walrecever can differ and ordinary backends cannot decide which to use. regards. -- Kyotaro Horiguchi NTT Open Source Software Center
