Re: libpq compression

From: Konstantin Knizhnik <knizhnik(at)garret(dot)ru>
To: Tomas Vondra <tomas(dot)vondra(at)enterprisedb(dot)com>, Konstantin Knizhnik <k(dot)knizhnik(at)postgrespro(dot)ru>, Justin Pryzby <pryzby(at)telsasoft(dot)com>
Cc: Denis Smirnov <sd(at)arenadata(dot)io>, Daniil Zakhlystov <usernamedt(at)yandex-team(dot)ru>, Andrey Borodin <x4mmm(at)yandex-team(dot)ru>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: libpq compression
Date: 2021-01-12 05:44:43
Message-ID: c48a2651-b8da-65ba-0cb9-64f497e29229@garret.ru
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On 11.01.2021 20:38, Tomas Vondra wrote:
> On 1/11/21 2:53 PM, Konstantin Knizhnik wrote:
>> ...
>>
>> New version of libpq compression patch is attached.
>> It can be also be found at git(at)github(dot)com:postgrespro/libpq_compression.git
>>
> Seems it bit-rotted already, so here's a slightly fixed version.
>
> 1) Fixes the MSVC makefile. The list of files is sorted alphabetically,
> so I've added the file at the end.
>
> 2) Fixes duplicate OID. It's a good practice to assign OIDs from the end
> of the range, to prevent collisions during development.

Thank you
>
> Other than that, I wonder what's the easiest way to run all tests with
> compression enabled. ISTM it'd be nice to add pg_regress option forcing
> a particular compression algorithm to be used, or something similar. I'd
> like a convenient way to pass this through a valgrind, for example. Or
> how do we get this tested on a buildfarm?
I run regression tests with PG_COMPRESSION environment variable set to
"true".
Do we need some other way (like pg_regress options to run tests with
compression enabled?

> I'm not convinced it's very user-friendly to not have a psql option
> enabling compression. It's true it can be enabled in a connection
> string, but I doubt many people will notice that.
>
> The sgml docs need a bit more love / formatting. The lines in libpq.sgml
> are far too long, and there are no tags whatsoever. Presumably zlib/zstd
> should be marked as <literal>, and so on.
>
>
> regards
>
Thank you, I will fix it.

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