From: | Ildus Kurbangaliev <i(dot)kurbangaliev(at)postgrespro(dot)ru> |
---|---|
To: | Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru> |
Cc: | Konstantin Knizhnik <k(dot)knizhnik(at)postgrespro(dot)ru>, Ildar Musin <i(dot)musin(at)postgrespro(dot)ru>, Robert Haas <robertmhaas(at)gmail(dot)com>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Евгений Шишкин <itparanoia(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Oleg Bartunov <obartunov(at)gmail(dot)com>, Craig Ringer <craig(at)2ndquadrant(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, Chapman Flack <chap(at)anastigmatix(dot)net> |
Subject: | Re: [HACKERS] Custom compression methods |
Date: | 2018-06-18 14:30:45 |
Message-ID: | 20180618173045.7f734aca@wp.localdomain |
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Lists: | pgsql-hackers |
On Tue, 24 Apr 2018 14:05:20 +0300
Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru> wrote:
>
> Yes, this patch definitely lacks of good usage example. That may
> lead to some misunderstanding of its purpose. Good use-cases
> should be shown before we can consider committing this. I think
> Ildus should try to implement at least custom dictionary compression
> method where dictionary is specified by user in parameters.
>
Hi,
attached v16 of the patch. I have splitted the patch to 8 parts so now
it should be easier to make a review. The main improvement is zlib
compression method with dictionary support like you mentioned. My
synthetic tests showed that zlib gives more compression but usually
slower than pglz.
--
---
Ildus Kurbangaliev
Postgres Professional: http://www.postgrespro.com
Russian Postgres Company
Attachment | Content-Type | Size |
---|---|---|
0001-Make-syntax-changes-for-custom-compression-metho-v16.patch | text/x-patch | 9.1 KB |
0002-Add-compression-catalog-tables-and-the-basic-inf-v16.patch | text/x-patch | 114.0 KB |
0003-Add-rewrite-rules-and-tupdesc-flags-v16.patch | text/x-patch | 24.4 KB |
0004-Add-pglz-compression-method-v16.patch | text/x-patch | 7.5 KB |
0005-Add-zlib-compression-method-v16.patch | text/x-patch | 9.9 KB |
0006-Add-psql-pg_dump-and-pg_upgrade-support-v16.patch | text/x-patch | 37.5 KB |
0007-Add-tests-for-compression-methods-v16.patch | text/x-patch | 133.5 KB |
0008-Add-documentation-for-custom-compression-methods-v16.patch | text/x-patch | 16.1 KB |
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