Re: Built-in Raft replication

From: Ashutosh Bapat <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>
To: Andrey Borodin <x4mmm(at)yandex-team(dot)ru>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Konstantin Osipov <kostja(dot)osipov(at)gmail(dot)com>, Greg Sabino Mullane <htamfids(at)gmail(dot)com>, Nikolay Samokhvalov <nik(at)postgres(dot)ai>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Built-in Raft replication
Date: 2025-04-16 06:45:44
Message-ID: CAExHW5tKMPenOkekjMqKYX1ckawfx-q55tD+LjoDYjqY1ETHjg@mail.gmail.com
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On Wed, Apr 16, 2025 at 11:57 AM Andrey Borodin <x4mmm(at)yandex-team(dot)ru> wrote:
>
>
>
> > On 16 Apr 2025, at 11:18, Ashutosh Bapat <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com> wrote:
> >
> > Having only some of the nodes act as DCS
> > and others purely PostgreSQL nodes will reduce waste of resources.
>
> But typically you need more DCS nodes than PostgreSQL nodes. Did you mean

In a small HA setup this might be true. But not when there are many
replicas. But ...

> “Having only some nodes act as PostgreSQL and others purely DCS nodes will reduce waste of resources”?

I mean, whatever the setup may be one shouldn't require to deploy a
big PostgreSQL server just because DCS needs majority.

--
Best Wishes,
Ashutosh Bapat

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