On Tue, Aug 13, 2024 at 5:47 AM Durumdara <durumdara@xxxxxxxxx> wrote:
Hello!We have to upgrade our server. The PG upgrade is impossible because of too much data.So we will create a new server with PG 16, and we have to migrate the databases one by one (from a PG 11 server).Is it possible?Does PG16 read PG11 dumps and restore them correctly on the PG16 server?
Section 19.6: https://www.postgresql.org/docs/16/upgrading.html
"Current releases of the dump programs can read data from any server version back to 9.2."
The major flaw in Section 19.6 is that it repeatedly says "use pg_dumpall", and only mentions pg_dump once. Don't use pg_dumpall; use pg_dump in "directory mode" with multiple threads. ("pg_dumpall --globals" is critical for roles and whatnot.)
This is how I recently migrated three multi-TB PG 9.6 RHEL6 servers to PG 14 on RHEL8.
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