Vijaykumar Jain wrote: > On Thu, Feb 3, 2022, 10:54 AM Victor Sudakov <vas@xxxxxxxxxx> wrote: > > > Nikhil Shetty wrote: > > > Hi, > > > I have a Primary and Standby running on Postgres v11.7. > > > > > > I was following the document to upgrade a PG v11.7 cluster to PG v13.4. > > > After upgrade using pg_upgrade on primary, I ran rsync to setup standby > > > PG13 but when I started the primary, the replication slots were not > > > present. How will standby start streaming in this case? > > > > > > We are using physical replication slots. > > > > You can create the replication slots manually with > > pg_create_physical_replication_slot() any time. > > > > However, unless you are very brave and know what you are doing, I'd > > recommend using pg_basebackup to setup a standby, not rsync. You can > > even use the -C and -S options of pg_basebackup to create the slots > > for you, and many other pg_basebackup's nice > > > > A small demo of 11 to 13 upgrade using pg_upgrade and rsync. > It might not be all the best practices, but just following the doc on my > laptop. > > > > https://gist.github.com/cabecada/4517af13245383b888833cfc69d741be > > Just ensure the backed up configs are in back in and also create the > replication slot. The black magick of using rsync instead of pg_basebackup is even documented in https://www.postgresql.org/docs/13/pgupgrade.html but it's much more difficult and error-prone than using pg_basebackup. -- Victor Sudakov VAS4-RIPE http://vas.tomsk.ru/ 2:5005/49@fidonet
