On Sat, Feb 13, 2021 at 10:23 PM Andres Freund <andres@anarazel.de> wrote:
>
> On 2021-02-13 17:37:29 +0100, Petr Jelinek wrote:
>
> > AFAIK this is exactly why origins are Wal logged along with
> > transaction, it allows us to guarantee never getting anything that has
> > beed durably written.
>
> I think you'd need something like origins in that case, because
> something could still go wrong before the other side has received the
> flush (network disconnect, primary crash, ...).
>
We are already using origins in apply-worker to guarantee that and
with each commit, the origin's lsn location is also WAL-logged. That
helps us to send the start location for a slot after the restart. As
far as I understand this is how it works from the apply-worker side. I
am not sure if I am missing something here?
--
With Regards,
Amit Kapila.