diff --git a/doc/src/sgml/pgupgrade.sgml b/doc/src/sgml/pgupgrade.sgml new file mode 100644 index 30f4544..4a646bd *** a/doc/src/sgml/pgupgrade.sgml --- b/doc/src/sgml/pgupgrade.sgml *************** psql --username postgres --file script.s *** 518,523 **** --- 518,529 ---- + A Log-Shipping Standby Server () cannot + be upgraded because the server must allow writes. The simplest case + is to upgrade the primary and use rsync to upgrade the standbys. + + + If you want to use link mode and you do not want your old cluster to be modified when the new cluster is started, make a copy of the old cluster and upgrade that in link mode. To make a valid copy