On Wed, Aug 5, 2026 at 9:36 PM Bohyun Lee <[email protected]> wrote: > The GUCs are introduced because we cannot assume the standby's storage layout > exactly matches the primary's, neither where the retained pre-upgrade > directory sits, nor how its files are physically placed. > It also depends on how the cluster intends to use the standby. For instance, > if the operator wants to keep the standby as a rollback target, it may be > worthwhile to use a different transfer mode via the newly introduced > pg_upgrade_standby_transfer_mode GUC, which I believe is useful. > Nevertheless, the reconstructed cluster will be logically identical, even if > the physical representation diverges.
Given the above design concepts, I still think WAL is fundamentally the wrong mechanism for this. BTW, you top-posted again. Please read the link I sent earlier and trim your replies. -- John Naylor Amazon Web Services
