Horton

Re: Add LZ4 compression in pg_dump

Daniel Gustafsson <daniel@yesql.se>

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From: Daniel Gustafsson <daniel@yesql.se>
To: Justin Pryzby <pryzby@telsasoft.com>
Cc: Georgios <gkokolatos@protonmail.com>, pgsql-hackers@lists.postgresql.org, Rachel Heaton <rachelmheaton@gmail.com>
Date: 2022-03-26T23:37:27Z
Lists: pgsql-hackers 
> On 26 Mar 2022, at 17:21, Justin Pryzby <pryzby@telsasoft.com> wrote:

> I suggested off-list to add an 0099 patch to change LZ4 to the default, to
> exercise it more on CI.

No need to change the defaults in autoconf for that.  The CFBot uses the cirrus
file in the tree so changing what the job includes can be easily done (assuming
the CFBot hasn't changed this recently which I think it hasn't).  I used that
trick in the NSS patchset to add a completely new job for --with-ssl=nss beside
the --with-ssl=openssl job.

--
Daniel Gustafsson		https://vmware.com/

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,