| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Jehan-Guillaume de Rorthais <jgdr(at)dalibo(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [patch] demote |
| Date: | 2020-06-18 17:15:33 |
| Message-ID: | 20200618171533.fc7m52zupa3pesma@alap3.anarazel.de |
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| Thread: | |
| Lists: | pgsql-hackers |
Hi,
On 2020-06-18 21:41:45 +0900, Fujii Masao wrote:
> ISTM that a clean switchover is possible without "ALTER SYSTEM READ ONLY".
> What about the following procedure?
>
> 1. Demote the primary to a standby. Then this demoted standby is read-only.
As far as I can tell this step includes ALTER SYSTEM READ ONLY. Sure you
can choose not to expose ASRO to the user separately from demote, but
that's a miniscule part of the complexity.
Greetings,
Andres Freund
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