On Tue, 08 Sep 2026, Heikki Linnakangas <[email protected]> wrote: > In principle, I think pg_rewind would still work as long as > wal_log_hints=on. But I don't think we need to cater for that, erroring > out is fine.
The problem with rewind/backups/etc in a mixed cluster is all the corner cases. Everything should work, except that we can end up with checksum errors because an instance that supposedly has checksums enabled ends up with a few pages without checksums. Most of the time the issue is immediately visible, but we can construct scenarios where users only get those checksum errors much later, when it is no longer clear if its a real corruption or a leftover issue from some tool use.
