On 11/24/24 08:05, Subhash Udata wrote:
Dear PostgreSQL Community,
I have a production database setup with a primary server and a standby
server. The database is currently running on *PostgreSQL 15.0*, and I
plan to upgrade both servers to *15.9*.
I have the following questions regarding the upgrade and replication
process:
1.
*Upgrade and Replication Compatibility*:
* My plan is to perform a failover, promote the standby server
(currently 15.0) to primary, and then upgrade the old primary
server to version 15.9.
* After upgrading the old primary server to version 15.9, I want
to configure it as a standby server and set up streaming
replication with the new primary server, which will still be
running version 15.0.
* Is it possible to establish streaming replication between these
two versions (*15.0* as primary and *15.9* as standby)?
2.
*Efficient Replication Setup*:
* The production database is around *1TB in size*, and creating
replication using |pg_basebackup| is taking more than 2–3 hours
to complete.
* Is there an alternative method to set up replication without
taking a full backup of the entire cluster but instead using
only the WAL files that have changed on both servers?
Why?
15.0 --> 15.9(actually you want the latest release 15.10) is a minor
upgrade it involves shutting down the servers installing the new version
binaries on each and restarting them.
You should read:
https://www.postgresql.org/support/versioning/
It would be a good idea to go through the Release Notes here:
https://www.postgresql.org/docs/15/release.html
To see what changed.
Your guidance and recommendations on these questions will be greatly
appreciated.
Thank you for your time and support!
Best regards,
Subhash
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
