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help / color / mirror / Atom feedFrom: Jim Nasby <[email protected]>
To: Devrim Gündüz <[email protected]>
Cc: Greg Sabino Mullane <[email protected]>
Cc: Ashutosh Bapat <[email protected]>
Cc: Andrey Borodin <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: Konstantin Osipov <[email protected]>
Cc: Nikolay Samokhvalov <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: Built-in Raft replication
Date: Tue, 29 Apr 2025 15:16:07 -0500
Message-ID: <CAMFBP2oGM9N8Kty-3DzRmmgV0=ROB7ss7Rudw8Wida92t9O0+w@mail.gmail.com> (raw)
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I've always assumed there'd have to be at least one global stream, if for
no other purpose than to be the source of truth about transaction commit
ordering (though, I was thinking of supporting multiple streams for one
database). Presumably the same could be used for shared objects. Or perhaps
shared objects just get their own stream. Either way, having a master
commit record that points at LSNs of various other streams is what I'd been
thinking.
On Wed, Apr 23, 2025 at 12:01 PM Devrim Gündüz <[email protected]> wrote:
> Hi,
>
> On Wed, 2025-04-23 at 11:48 -0500, Jim Nasby wrote:
> > unless we added multiple WAL streams. That would allow for splitting
> > WAL traffic across multiple devices as well as providing better
> > support for configurations that don’t replicate the entire cluster.
> > The current situation where delayed replication of a single table
> > mandates retention of all the WAL for the entire cluster is less than
> > ideal.
>
> I think the problem is handling the stream of global objects. Having
> separate stream for each database would be awesome as long as it can
> deal with the "global stream".
>
> Regards,
> --
> Devrim Gündüz
> Open Source Solution Architect, PostgreSQL Major Contributor
> BlueSky: @devrim.gunduz.org , @gunduz.org
>
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Subject: Re: Built-in Raft replication
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