Horton

RE: [PoC] pg_upgrade: allow to upgrade publisher node

Hayato Kuroda (Fujitsu) <kuroda.hayato@fujitsu.com>

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From: "Hayato Kuroda (Fujitsu)" <kuroda.hayato@fujitsu.com>
To: 'Peter Smith' <smithpb2250@gmail.com>
Cc: Amit Kapila <amit.kapila16@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Bruce Momjian <bruce@momjian.us>, Julien Rouhaud <rjuju123@gmail.com>, vignesh C <vignesh21@gmail.com>, Masahiko Sawada <sawada.mshk@gmail.com>, "Zhijie Hou (Fujitsu)" <houzj.fnst@fujitsu.com>
Date: 2023-09-01T04:46:18Z
Lists: pgsql-hackers

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Dear Peter,

Thanks for giving comments! PSA new version.
I replied only comment 8 because others were replied by Amit.

> .../t/003_logical_replication_slots.pl
> 
> 8. Consider adding one more test
> 
> Maybe there should also be some "live check" test performed (e.g.
> using --check, and a running old_cluster).
> 
> This would demonstrate pg_upgrade working successfully even when the
> WAL records are not consumed (because LSN checks would be skipped in
> check_old_cluster_for_valid_slots function).

I was ignored the case because it did not improve improve code coverage, but
indeed, no one has checked the feature. I'm still not sure what should be, but
added. I want to hear your opinions.



Furthermore, based on comments from Dilip [1], added the comment and
check_new_cluster_logical_replication_slots() was modified. IIUC pg_upgrade
does not have method to handle plural form, so if-statement was used.
If you have better options, please tell me.

[1]: https://www.postgresql.org/message-id/CAFiTN-tgm9wCTyG4co%2BVZhyFTnzh-KoPtYbuH9bRFmxroJ34EQ%40mail.gmail.com

Best Regards,
Hayato Kuroda
FUJITSU LIMITED

Commits

  1. Fix issues in binary_upgrade_logical_slot_has_caught_up().

  2. Fix a random failure in 003_logical_slots.pl.

  3. Fix a test in 003_logical_slots.

  4. Fix uninitialized slot array access during the upgrade.

  5. Fix the test 003_logical_slots.

  6. Commit b195e6d482 forgot to update meson.build.

  7. Use shorter file names in the upgrade logical slots test.

  8. Migrate logical slots to the new node during an upgrade.

  9. Flush logical slots to disk during a shutdown checkpoint if required.

  10. Prevent possibility of panics during shutdown checkpoint.