From: | "Drouvot, Bertrand" <bertranddrouvot(dot)pg(at)gmail(dot)com> |
---|---|
To: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
Cc: | PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
Subject: | Re: Helper functions for wait_for_catchup() in Cluster.pm |
Date: | 2023-01-26 09:33:53 |
Message-ID: | 606daf52-fcc8-bc5e-6e7a-75d9f7c29532@gmail.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
Hi,
On 1/24/23 7:27 PM, Alvaro Herrera wrote:
> Looking again, I have two thoughts for making things easier:
>
> 1. I don't think wait_for_write_catchup is necessary, because
> calling wait_for_catchup() and omitting the 'mode' and 'lsn' arguments
> would already do the same thing. So what we should do is patch places
> that currently give those two arguments, so that they don't.
>
Agree but there is one place where the node passed as the second argument is not the "$self":
src/bin/pg_rewind/t/007_standby_source.pl:$node_b->wait_for_write_catchup('node_c', $node_a);
So it looks like there is still a need for wait_for_write_catchup().
> 2. Because wait_for_replay_catchup is an instance method, passing the
> second node as argument is needlessly noisy, because that's already
> known as $self. So we can just say
>
> $primary_node->wait_for_replay_catchup($standby_node);
>
Yeah, but same here, there is places where the node passed as the second argument is not the "$self":
src/bin/pg_rewind/t/007_standby_source.pl:$node_b->wait_for_replay_catchup('node_c', $node_a);
src/test/recovery/t/001_stream_rep.pl:$node_standby_1->wait_for_replay_catchup($node_standby_2, $node_primary);
src/test/recovery/t/001_stream_rep.pl:$node_standby_1->wait_for_replay_catchup($node_standby_2, $node_primary);
src/test/recovery/t/001_stream_rep.pl: $node_standby_1->wait_for_replay_catchup($node_standby_2, $node_primary);
So it looks like there is still a need for wait_for_replay_catchup() with 2 parameters.
Regards,
--
Bertrand Drouvot
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com
From | Date | Subject | |
---|---|---|---|
Next Message | Alvaro Herrera | 2023-01-26 09:42:41 | Re: Helper functions for wait_for_catchup() in Cluster.pm |
Previous Message | Peter Eisentraut | 2023-01-26 09:20:58 | Re: meson oddities |