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

From: Dilip Kumar <dilipbalaut(at)gmail(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Andrew Dunstan <andrew(at)dunslane(dot)net>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: [Proposal] Fully WAL logged CREATE DATABASE - No Checkpoints
Date: 2022-02-10 12:32:31
Message-ID: CAFiTN-syN3aqTo1RFUgCTNAiYVJCTEEDzBAA1UG70W3eULVCFg@mail.gmail.com
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On Wed, Feb 9, 2022 at 9:31 PM Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>
> On Wed, Feb 9, 2022 at 10:59 AM Dilip Kumar <dilipbalaut(at)gmail(dot)com> wrote:
> > On Wed, Feb 9, 2022 at 9:25 PM Andrew Dunstan <andrew(at)dunslane(dot)net> wrote:
> > > On 6/16/21 03:52, Dilip Kumar wrote:
> > > > On Tue, Jun 15, 2021 at 7:01 PM Andrew Dunstan <andrew(at)dunslane(dot)net> wrote:
> > > >> Rather than use size, I'd be inclined to say use this if the source
> > > >> database is marked as a template, and use the copydir approach for
> > > >> anything that isn't.
> > > > Yeah, that is possible, on the other thought wouldn't it be good to
> > > > provide control to the user by providing two different commands, e.g.
> > > > COPY DATABASE for the existing method (copydir) and CREATE DATABASE
> > > > for the new method (fully wal logged)?
> > >
> > > This proposal seems to have gotten lost.
> >
> > Yeah, I am planning to work on this part so that we can support both methods.
>
> But can we pick a different syntax? In my view this should be an
> option to CREATE DATABASE rather than a whole new command.

Maybe we can provide something like

CREATE DATABASE..WITH WAL_LOG=true/false ? OR
CREATE DATABASE..WITH WAL_LOG_DATA_PAGE=true/false ? OR
CREATE DATABASE..WITH CHECKPOINT=true/false ? OR

And then we can explain in documentation about these options? I think
default should be new method?

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

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