Horton

Re: [Proposal] Fully WAL logged CREATE DATABASE - No Checkpoints

Dilip Kumar <dilipbalaut@gmail.com>

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From: Dilip Kumar <dilipbalaut@gmail.com>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Andres Freund <andres@anarazel.de>, Ashutosh Sharma <ashu.coek88@gmail.com>, Maciek Sakrejda <m.sakrejda@gmail.com>, Bruce Momjian <bruce@momjian.us>, Alvaro Herrera <alvherre@alvh.no-ip.org>, Andrew Dunstan <andrew@dunslane.net>, Heikki Linnakangas <hlinnaka@iki.fi>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2022-03-24T16:12:39Z
Lists: pgsql-hackers 
On Thu, Mar 24, 2022 at 9:29 PM Robert Haas <robertmhaas@gmail.com> wrote:
>
> On Thu, Mar 24, 2022 at 1:29 AM Dilip Kumar <dilipbalaut@gmail.com> wrote:
> > In the latest version I have fixed this issue by using a non
> > conflicting name, because when it was compiled with-icu the foobar5
> > was already used and we were seeing failure.  Apart from this I have
> > fixed the duplicate cleanup problem by passing an extra parameter to
> > RelationCreateStorage, which decides whether to register for on-abort
> > delete or not and added the comments for the same.  IMHO this looks
> > the most cleaner way to do it, please check the patch and let me know
> > your thoughts.
>
> I think that might be an OK way to do it. I think if we were starting
> from scratch we'd probably want to come up with some better system,
> but that's true of a lot of things.

Right.

> I went over your version and changed some comments. I also added
> documentation for the new wait event. Here's a new version.
>

Thanks, I have gone through your changes in comments and docs and those LGTM.

-- 
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com

Commits

  1. When using the WAL-logged CREATE DATABASE strategy, bulk extend.

  2. Avoid using a fake relcache entry to own an SmgrRelation.

  3. Fix data-corruption hazard in WAL-logged CREATE DATABASE.

  4. initdb: When running CREATE DATABASE, use STRATEGY = WAL_COPY.

  5. Simplify a needlessly-complicated regular expression.

  6. In 020_createdb.pl, change order of command-line arguments.

  7. Add new block-by-block strategy for CREATE DATABASE.

  8. Fix replay of create database records on standby

  9. Refactor code for reading and writing relation map files.

  10. Replace RelationOpenSmgr() with RelationGetSmgr().

  11. Refactor the fsync queue for wider use.