Re: backup manifests and contemporaneous buildfarm failures

Tom Lane <tgl@sss.pgh.pa.us>

From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Thomas Munro <thomas.munro@gmail.com>, Fabien COELHO <coelho@cri.ensmp.fr>, Alvaro Herrera <alvherre@2ndquadrant.com>, David Steele <david@pgmasters.net>, Andres Freund <andres@anarazel.de>, Noah Misch <noah@leadboat.com>, Stephen Frost <sfrost@snowman.net>, Amit Kapila <amit.kapila16@gmail.com>, Suraj Kharage <suraj.kharage@enterprisedb.com>, tushar <tushar.ahuja@enterprisedb.com>, Rajkumar Raghuwanshi <rajkumar.raghuwanshi@enterprisedb.com>, Rushabh Lathia <rushabh.lathia@gmail.com>, Tels <nospam-pg-abuse@bloodgate.com>, Andrew Dunstan <andrew.dunstan@2ndquadrant.com>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>, Jeevan Chalke <jeevan.chalke@enterprisedb.com>, vignesh C <vignesh21@gmail.com>
Date: 2020-04-03T23:02:13Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →
  1. Try to avoid compiler warnings in optimized builds.

  2. Fix option related issues in pg_verifybackup.

  3. Add index term for backup manifest in documentation.

  4. Code review for backup manifest.

  5. Document the backup manifest file format.

  6. Fix typo in pg_validatebackup documentation.

  7. Exclude backup_manifest file that existed in database, from BASE_BACKUP.

  8. Msys2 tweaks for pg_validatebackup corruption test

  9. Fix resource management bug with replication=database.

  10. Be more careful about time_t vs. pg_time_t in basebackup.c.

  11. pg_validatebackup: Fix 'make clean' to remove tmp_check.

  12. pg_validatebackup: Also use perl2host in TAP tests.

  13. Generate backup manifests for base backups, and validate them.

  14. Add checksum helper functions.

  15. pg_waldump: Add a --quiet option.

  16. Catversion bump for b9b408c48724

  17. pg_basebackup: Refactor code for reading COPY and tar data.

  18. Use a ResourceOwner to track buffer pins in all cases.

  19. Use ARMv8 CRC instructions where available.

  20. Logical replication support for initial data copy

  21. Use Intel SSE 4.2 CRC instructions where available.

  22. Switch to CRC-32C in WAL and other places.

  23. Remove support for 64-bit CRC.

  24. Change CRCs in WAL records from 64bit to 32bit for performance reasons.

I wrote:
> I'm guessing that we're looking at a platform-specific difference in
> whether "rm -rf" fails outright on an unreadable subdirectory, or
> just tries to carry on by unlinking it anyway.

Yeah... on my RHEL6 box, "make check" cleans up the working directories
under tmp_check, but on a FreeBSD 12.1 box, not so much: I'm left with

$ ls tmp_check/
log/                            t_003_corruption_master_data/
tgl@oldmini$ ls -R tmp_check/t_003_corruption_master_data/
backup/

tmp_check/t_003_corruption_master_data/backup:
open_directory_fails/

tmp_check/t_003_corruption_master_data/backup/open_directory_fails:
pg_subtrans/

tmp_check/t_003_corruption_master_data/backup/open_directory_fails/pg_subtrans:
ls: tmp_check/t_003_corruption_master_data/backup/open_directory_fails/pg_subtrans: Permission denied

I did not see any complaints printed to the terminal, but in
regress_log_003_corruption there's

...
ok 40 - corrupt backup fails validation: open_directory_fails: matches
cannot chdir to child for /usr/home/tgl/pgsql/src/bin/pg_validatebackup/tmp_check/t_003_corruption_master_data/backup/open_directory_fails/pg_subtrans: Permission denied at t/003_corruption.pl line 126.
cannot remove directory for /usr/home/tgl/pgsql/src/bin/pg_validatebackup/tmp_check/t_003_corruption_master_data/backup/open_directory_fails: Directory not empty at t/003_corruption.pl line 126.
# Running: pg_basebackup -D /usr/home/tgl/pgsql/src/bin/pg_validatebackup/tmp_check/t_003_corruption_master_data/backup/search_directory_fails --no-sync -T /tmp/lxaL_sLcnr=/tmp/_fegwVjoDR
ok 41 - base backup ok
...

This may be more of a Perl version issue than a platform issue,
but either way it's a problem.

Also, on the FreeBSD box, "rm -rf" isn't happy either:

$ rm -rf tmp_check
rm: tmp_check/t_003_corruption_master_data/backup/open_directory_fails/pg_subtrans: Permission denied
rm: tmp_check/t_003_corruption_master_data/backup/open_directory_fails: Directory not empty
rm: tmp_check/t_003_corruption_master_data/backup: Directory not empty
rm: tmp_check/t_003_corruption_master_data: Directory not empty
rm: tmp_check: Directory not empty


			regards, tom lane