Re: Stabilize and shorten test_checksums/013_rewind test

> On 23 Sep 2026, at 12:15, Nazir Bilal Yavuz <byavuz81(at)gmail(dot)com> wrote:
> On Tue, 22 Sept 2026 at 00:38, Zsolt Parragi <zsolt(dot)parragi(at)percona(dot)com> wrote:

>> Shouldn't 021 get the same fix (0001)? That's only executed with
>> checksum_extended so its not that visible on CI, but it has the same
>> issue.
>
> Yes, you are right. I realized that we can do the same thing for all
> test_checksum tests, so I applied similar change to all of the related
> checksum tests in 0001.

I've been looking at this patch and have tested it extensively both on local
hardware and CI instances. Copilot review pointed out one thing which I think
is accurate (though unlikely to happen), if the START WAL LOCATION and
CHECKPOINT LOCATION straddle segments then the test would fail. Extracting the
WAL filename from $shutdown_ckpt is the safer option. That fix and some commit
message tweaking are the only changes in the attached v4.

--
Daniel Gustafsson