Horton

Re: speed up a logical replica setup

Amit Kapila <amit.kapila16@gmail.com>

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From: Amit Kapila <amit.kapila16@gmail.com>
To: Euler Taveira <euler@eulerto.com>
Cc: Peter Eisentraut <peter@eisentraut.org>, Shlok Kyal <shlok.kyal.oss@gmail.com>, "kuroda.hayato@fujitsu.com" <kuroda.hayato@fujitsu.com>, Tomas Vondra <tomas.vondra@enterprisedb.com>, "pgsql-hackers@lists.postgresql.org" <pgsql-hackers@lists.postgresql.org>, Michael Paquier <michael@paquier.xyz>, Andres Freund <andres@anarazel.de>, Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>, Fabrízio de Royes Mello <fabriziomello@gmail.com>, vignesh C <vignesh21@gmail.com>
Date: 2024-03-26T04:06:09Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. pg_createsubscriber: Remove obsolete comment

  2. pg_createsubscriber: Fix an unpredictable recovery wait time.

  3. Fix unstable test in 040_pg_createsubscriber.

  4. Fix the testcase introduced in commit 81d20fbf7a.

  5. Further weaken new pg_createsubscriber test on Windows.

  6. Temporarily(?) weaken new pg_createsubscriber test on Windows.

  7. Make pg_createsubscriber warn if publisher has two-phase commit enabled.

  8. Make pg_createsubscriber more wary about quoting connection parameters.

  9. pg_createsubscriber: Remove failover replication slots on subscriber

  10. pg_createsubscriber: Remove replication slot check on primary

  11. pg_createsubscriber: Only --recovery-timeout controls the end of recovery process

  12. pg_createsubscriber: creates a new logical replica from a standby server

  13. Add some const decorations

  14. Add option force_initdb to PostgreSQL::Test::Cluster:init()

  15. Remove MSVC scripts

On Tue, Mar 26, 2024 at 8:27 AM Euler Taveira <euler@eulerto.com> wrote:
>
> On Mon, Mar 25, 2024, at 11:33 PM, Amit Kapila wrote:
>
> On Mon, Mar 25, 2024 at 5:25 PM Peter Eisentraut <peter@eisentraut.org> wrote:
> >
> > I have committed your version v33.  I did another pass over the
> > identifier and literal quoting.  I added quoting for replication slot
> > names, for example, even though they can only contain a restricted set
> > of characters, but it felt better to be defensive there.
> >
> > I'm happy to entertain follow-up patches on some of the details like
> > option naming that were still being discussed.  I just wanted to get the
> > main functionality in in good time.  We can fine-tune the rest over the
> > next few weeks.
> >
>
> I was looking at prior discussions on this topic to see if there are
> any other open design points apart from this and noticed that the
> points raised/discussed in the email [1] are also not addressed. IIRC,
> the key point we discussed was that after promotion, the existing
> replication objects should be removed (either optionally or always),
> otherwise, it can lead to a new subscriber not being able to restart
> or getting some unwarranted data.
>
>
> See setup_subscriber.
>
>         /*
>          * Since the publication was created before the consistent LSN, it is
>          * available on the subscriber when the physical replica is promoted.
>          * Remove publications from the subscriber because it has no use.
>          */
>         drop_publication(conn, &dbinfo[I]);
>

This only drops the publications created by this tool, not the
pre-existing ones that we discussed in the link provided.

-- 
With Regards,
Amit Kapila.