Horton

Re: pg_dump versus ancient server versions

Andrew Dunstan <andrew@dunslane.net>

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From: Andrew Dunstan <andrew@dunslane.net>
To: Tom Lane <tgl@sss.pgh.pa.us>, Robert Haas <robertmhaas@gmail.com>
Cc: Alvaro Herrera <alvherre@alvh.no-ip.org>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Andres Freund <andres@anarazel.de>
Date: 2021-10-25T15:28:04Z
Lists: pgsql-hackers 
On 10/25/21 10:23, Tom Lane wrote:
>
> Also, I concur with Andrew's point that we'd really have to have
> buildfarm support.  However, this might not be as bad as it seems.
> In principle we might just need to add resurrected branches back to
> the branches_to_build list.  Given my view of what the back-patching
> policy ought to be, a new build in an old branch might only be
> required a couple of times a year, which would not be an undue
> investment of buildfarm resources.  (Hmmm ... but disk space could
> become a problem, particularly on older machines with not so much
> disk.  Do we really need to maintain a separate checkout for each
> branch?  It seems like a fresh checkout from the repo would be
> little more expensive than the current copy-a-checkout process.)


If you set it up with these settings then the disk space used is minimal:

     git_use_workdirs => 1,
     rm_worktrees => 1,

So I have this on crake:

    andrew@emma:root $ du -sh REL*/pgsql
    5.5M    REL_10_STABLE/pgsql
    5.6M    REL_11_STABLE/pgsql
    5.6M    REL_12_STABLE/pgsql
    5.6M    REL_13_STABLE/pgsql
    2.0M    REL_14_STABLE/pgsql
    2.6M    REL9_5_STABLE/pgsql
    5.5M    REL9_6_STABLE/pgsql


cheers


andrew

--
Andrew Dunstan
EDB: https://www.enterprisedb.com

Commits

  1. Remove psql support for server versions preceding 9.2.

  2. Clean up some more freshly-dead code in pg_dump and pg_upgrade.

  3. Remove pg_dump's --no-synchronized-snapshots switch.

  4. Remove pg_upgrade support for upgrading from pre-9.2 servers.

  5. Remove pg_dump/pg_dumpall support for dumping from pre-9.2 servers.

  6. Suppress -Warray-bounds warning in 9.2's xlog.c.

  7. Suppress -Wformat-overflow warnings in 9.2's xml.c.

  8. Disable -Wsometimes-uninitialized warnings in the 9.2 branch.

  9. Fix function return type confusion

  10. Fix compiler warning

  11. Silence another gcc 11 warning.

  12. Suppress uninitialized-variable warning in guc.c.

  13. Suppress -Warray-parameter warnings in pgcrypto/sha2.c.

  14. Reformat imath.c macro to remove -Wmisleading-indentation warnings.

  15. Clean up compilation warnings coming from PL/Perl with clang-12~

  16. Make ecpg's rjulmdy() and rmdyjul() agree with their declarations.

  17. Use -Wno-format-truncation and -Wno-stringop-truncation, if available.

  18. Make pg_upgrade's test.sh less chatty.

  19. Add checks for valid multibyte character length in UtfToLocal, LocalToUtf.

  20. Use return instead of exit() in configure

  21. Add support for Visual Studio 2019 in build scripts