On 1/26/20 7:30 PM, Adrian Klaver wrote:
On 1/26/20 2:47 PM, Andrus wrote:
Hi!
Before you do any of this I would check the Release Notes for the first
release of each major release. Prior to version 10 that would be X.X.x
where X is a major release. For 10+ that is X.x. I would also test the
upgrade before doing it on your production setup.
I want to create test transfer first, check applications work and after
that final transfer.
Best practice if you are going the dump/restore route is to use the
pg_dump binary from the new server(12) to dump the old server(9.1)
Postgres version 12 pg_dump probably cannot installed in old server
(Debian Squeeze 9).
Running pg_dump in new server probably takes much more time since data is
read from uncompressed form and dumping is time-consuming process.
(internet connection between those server is fast, SSH copy speed was 800
Mbit (not 100 Mbit as I wrote), it took 5 minutes to copy 37 GB).
Test it and see how slow/fast it is.
I ran *uncompressed* pg_dump on multiple TB+ sized databases from v8.4
servers across the LAN using 9.6 binaries on the remote server. It was
quite fast. Threading was key.
--
Angular momentum makes the world go 'round.
