Horton

Re: Add LZ4 compression in pg_dump

gkokolatos@pm.me

View thread View on postgr.es
From: gkokolatos@pm.me
To: Tomas Vondra <tomas.vondra@enterprisedb.com>
Cc: "shiy.fnst@fujitsu.com" <shiy.fnst@fujitsu.com>, Michael Paquier <michael@paquier.xyz>, Justin Pryzby <pryzby@telsasoft.com>, "pgsql-hackers@lists.postgresql.org" <pgsql-hackers@lists.postgresql.org>, Rachel Heaton <rachelmheaton@gmail.com>
Date: 2023-02-20T13:09:22Z
Lists: pgsql-hackers

Attachments





------- Original Message -------
On Sunday, February 19th, 2023 at 6:10 PM, Tomas Vondra <tomas.vondra@enterprisedb.com> wrote:


>
>
> Hi Georgios,
>
> I spent some time looking at the patch again, and IMO it's RFC. But I
> need some help with the commit messages - I updated 0001 and 0002 but I
> wasn't quite sure what some of the stuff meant to say and/or it seemed
> maybe coming from an earlier patch version and obsolete.

Thank you very much Tomas! Indeed I have not being paying any attention
at the commit messages.

> Could you go over them and check if I got it right? Also feel free to
> update the list of reviewers (I compiled that from substantial reviews
> on the thread).

Done. Rachel has been correctly identified as author in the relevant parts
up to commit 98fe74218d. After that, she had offered review comments and I
have taken the liberty to add her as a reviewer through out.

Also I think that Shi Yu should be credited as a reviewer of 0003.

>
> The 0003 commit message seems somewhat confusing - I added some XXX
> lines asking about unclear stuff.

Please find in the attached v30 an updated message, as well as an amended
reviewer list. Also v30 addresses the final comments raised by Justin.

Cheers,
//Georgios

> regards
>
> --
> Tomas Vondra
> EnterpriseDB: http://www.enterprisedb.com
> The Enterprise PostgreSQL Company

Commits

  1. Advance input pointer when LZ4 compressing data

  2. Null-terminate the output buffer of LZ4Stream_gets

  3. Rework code defining default compression for dir/custom formats in pg_dump

  4. pg_dump: Use only LZ4 frame format for compression

  5. Minor comment improvements for compress_lz4

  6. Unify buffer sizes in pg_dump compression API

  7. Improve type handling in pg_dump's compress file API

  8. Improve wording in pg_dump compression docs

  9. Fix condition in pg_dump TAP test

  10. Add LZ4 compression to pg_dump

  11. Introduce a generic pg_dump compression API

  12. Prepare pg_dump internals for additional compression methods

  13. Fix behavior with pg_restore -l and compressed dumps

  14. Add 250c8ee07ed to git-blame-ignore-revs

  15. Provide test coverage in pg_dump for default behaviors with compression

  16. Switch pg_dump to use compression specifications

  17. Refactor code parsing compression option values (-Z/--compress)

  18. meson: Add some missing env settings for tests of pg_dump and pg_verifybackup

  19. Extend TAP tests of pg_dump to test for compression with gzip

  20. Clean up some dead code in pg_dump with tar format and gzip compression

  21. Add TAP test in pg_dump with --format=tar and --compress

  22. Replace BASE_BACKUP COMPRESSION_LEVEL option with COMPRESSION_DETAIL.

  23. Refactor the pg_dump zlib code from pg_backup_custom.c to a separate file,