| From: | Andrey Borodin <x4mmm(at)yandex-team(dot)ru> |
|---|---|
| To: | Dilip Kumar <dilipbalaut(at)gmail(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, 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: | 2020-12-28 06:14:43 |
| Message-ID: | 376CC7A5-969C-4A53-8597-C736BEFBF7F7@yandex-team.ru |
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| Thread: | |
| Lists: | pgsql-hackers |
> 28 дек. 2020 г., в 10:20, Dilip Kumar <dilipbalaut(at)gmail(dot)com> написал(а):
>
> On Sun, Dec 27, 2020 at 12:40 PM Andrey Borodin <x4mmm(at)yandex-team(dot)ru> wrote:
>>
>>
>>
>>> 25 дек. 2020 г., в 14:34, Dilip Kumar <dilipbalaut(at)gmail(dot)com> написал(а):
>>>
>>> <v16-0002-alter-table-set-compression.patch> <v16-0004-Create-custom-compression-methods.patch> <v16-0005-new-compression-method-extension-for-zlib.patch> <v16-0001-Built-in-compression-method.patch> <v16-0003-Add-support-for-PRESERVE.patch> <v16-0006-Support-compression-methods-options.patch>
>>
>> Maybe add Lz4\Zlib WAL FPI compression on top of this patchset? I'm not insisting on anything, it just would be so cool to have it...
>>
>> BTW currently there are Oid collisions in original patchset.
>
> Thanks for the patch. Maybe we can allow setting custom compression
> methods for wal compression as well.
No, unfortunately, we can't use truly custom methods. Custom compression handlers are WAL-logged. So we can use only static set of hardcoded compression methods.
Thanks!
Best regards, Andrey Borodin.
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