From: | Andres Freund <andres(at)anarazel(dot)de> |
---|---|
To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
Cc: | Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru>, David Steele <david(at)pgmasters(dot)net>, Ildus Kurbangaliev <i(dot)kurbangaliev(at)gmail(dot)com>, Dmitry Dolgov <9erthalion6(at)gmail(dot)com>, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
Subject: | Re: [HACKERS] Custom compression methods |
Date: | 2020-06-29 16:31:48 |
Message-ID: | 20200629163148.jrb4ocscpjmgkdfa@alap3.anarazel.de |
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Lists: | pgsql-hackers |
Hi,
On 2020-06-24 07:59:47 -0400, Robert Haas wrote:
> On Tue, Jun 23, 2020 at 4:00 PM Andres Freund <andres(at)anarazel(dot)de> wrote:
> > https://postgr.es/m/20130621000900.GA12425%40alap2.anarazel.de is a
> > thread with more information / patches further along.
> >
> > I confused this patch with the approach in
> > https://www.postgresql.org/message-id/d8576096-76ba-487d-515b-44fdedba8bb5%402ndquadrant.com
> > sorry for that. It obviously still differs by not having lower space
> > overhead (by virtue of not having a 4 byte 'va_cmid', but no additional
> > space for two methods, and then 1 byte overhead for 256 more), but
> > that's not that fundamental a difference.
>
> Wait a minute. Are we saying there are three (3) dueling patches for
> adding an alternate TOAST algorithm? It seems like there is:
>
> This "custom compression methods" thread - vintage 2017 - Original
> code by Nikita Glukhov, later work by Ildus Kurbangaliev
> The "pluggable compression support" thread - vintage 2013 - Andres Freund
> The "plgz performance" thread - vintage 2019 - Petr Jelinek
>
> Anyone want to point to a FOURTH implementation of this feature?
To be clear, I don't think the 2003 patch should be considered as being
"in the running".
Greetings,
Andres Freund
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