Re: Are ZFS snapshots unsafe when PGSQL is spreading through multiple zpools?

From: Rob Sargent <robjsargent(at)gmail(dot)com>
To: pgsql-general(at)lists(dot)postgresql(dot)org
Subject: Re: Are ZFS snapshots unsafe when PGSQL is spreading through multiple zpools?
Date: 2023-01-18 16:54:32
Message-ID: 26bf6de1-4a05-54b1-13ea-ce8c56e79344@gmail.com
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On 1/18/23 09:38, HECTOR INGERTO wrote:
>
> I wanted to understand the underlying issue.
>
> I use ZFS snapshots instead of a “correct” backup because with only
> two machines it allows me to have backups in the main machine and in
> the secondary too that acts as hotspare at the same time.
>
> To accomplish the same I would need 3 nodes. The main, the replica
> hotspare and the proper backup.
>

Isn't "proper backup" typically thought of as offsite reloadable file
capture, hopefully relatively recent?  Disaster recovery, and all that.

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