Horton

Re: Add LZ4 compression in pg_dump

Justin Pryzby <pryzby@telsasoft.com>

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From: Justin Pryzby <pryzby@telsasoft.com>
To: gkokolatos@pm.me
Cc: Michael Paquier <michael@paquier.xyz>, pgsql-hackers@lists.postgresql.org, Rachel Heaton <rachelmheaton@gmail.com>
Date: 2022-11-23T20:52:22Z
Lists: pgsql-hackers 
On Tue, Nov 22, 2022 at 10:00:47AM +0000, gkokolatos@pm.me wrote:
> For the record I am currently working on it simply unsure if I should submit
> WIP patches and add noise to the list or wait until it is in a state that I
> feel that the comments have been addressed.
> 
> A new version that I feel that is in a decent enough state for review should
> be ready within this week. I am happy to drop the patch if you think I should
> not work on it though.

I hope you'll want to continue work on it.  The patch record is like a
request for review, so it's closed if there's nothing ready to review.

I think you should re-send patches (and update the CF app) as often as
they're ready for more review.  Your 001 commit (which is almost the
same as what I wrote 2 years ago) still needs to account for some review
comments, and the whole patch set ought to pass cirrusci tests.  At that
point, you'll be ready for another round of review, even if there's
known TODO/FIXME items in later patches.

BTW I saw that you updated your branch on github.  You'll need to make
the corresponding changes to ./meson.build that you made to ./Makefile.
https://wiki.postgresql.org/wiki/Meson_for_patch_authors
https://wiki.postgresql.org/wiki/Meson                                                                                                                                                                                             

-- 
Justin

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,