Re: pg_upgrde failed : logical replication : alter_subscription_add_log

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On Fri, Apr 12, 2024 at 10:44 AM Perumal Raj <perucinci(at)gmail(dot)com> wrote:

> Thanks Amit for the update,
>
> Documentation says : https://www.postgresql.org/docs/15/upgrading.html
>
> 19.6.3. Upgrading Data via Replication
>
> It is also possible to use logical replication methods to create a standby
> server with the updated version of PostgreSQL. This is possible because
> logical replication supports replication between different major versions
> of PostgreSQL. The standby can be on the same computer or a different
> computer. Once it has synced up with the primary server (running the older
> version of PostgreSQL), you can switch primaries and make the standby the
> primary and shut down the older database instance. Such a switch-over
> results in only several seconds of downtime for an upgrade.
>
> This method of upgrading can be performed using the built-in logical
> replication facilities as well as using external logical replication
> systems such as pglogical, Slony, Londiste, and Bucardo.
>
> What is "built-in logical replication" ?
>

See docs at [1].

[1] - https://www.postgresql.org/docs/devel/logical-replication.html
--
With Regards,
Amit Kapila