22.2. Notable changes to createrepo_c
Default createrepo_c compression has changed from gzip to Zstandard
The createrepo_c command now compresses non-database metadata with the Zstandard (zstd) compression algorithm instead of gzip. Note that the database metadata still defaults to the bzip2 format. You can override the compression format by using the --general-compress-type option.
SQLite databases are now not generated by default
To save disk space, the createrepo_c command no longer creates SQLite databases next to XML files. You can explicitly create the databases by using the --database option.
Support for creating the SQLite databases with the createrepo --databases command is deprecated and will be removed in future RHEL major versions.