Hi Peter > On Oct 29, 2023, at 02:43, Peter J. Holzer <hjp-pgsql@xxxxxx> wrote: > I don't think so. AFAIK Replication keeps the data files in sync on a > bit-for-bit level and turning on checksums changes the data layout. > Running a cluster where one node has checksums and the other doesn't > would result in a complete mess. I agree with the last sentence. This is why I asked if it is safe to enable checksums on a replica, switch over and then do it again on the ex primary, i.e. now new replica without doing a reinit. Cheers Paul
