Backups must be restored and verified—I measured the conditions under which SQLite, PostgreSQL, and MySQL fail to restore and created a verification script

When judging whether a backup can be restored based solely on exit codes and integrity checks, I found conditions in SQLite, ...

Measuring 3 paths to upgrade from PostgreSQL 14 to 18 using official Docker images: Startup fails with old mounts, and pg_upgrade stops due to checksums

Reports in the docker-library/postgres issues and Japanese articles (see the Sources section) state that the official Docker ...