Re: datachecksums: handle invalid and dropped databases during enable

> On 28 Jul 2026, at 12:01, Zsolt Parragi <zsolt(dot)parragi(at)percona(dot)com> wrote:

> While testing the online enabling of datachecksums, I discovered some
> corner cases that can cause the background process to fail:
>
> * Invalid databases were only discovered when we tried to create
> checksums for them, when we could instead discover them before
> starting and fail early
> * Databases dropped while the checksum process was running also
> resulted in errors when it reached them and tried to build checksums
> for them. In this case we could continue safely: the database was
> dropped, there's no need to create checksums for it.
>
> I attached a patch that adds testcases for these and fixes the issues.

Thanks, I've reviewed and tested your patch and intend to push it along with
your other earlier patch shortly.

--
Daniel Gustafsson