Re: Add basic tests for the low-level backup method.

On 3/13/24 19:15, Michael Paquier wrote:
> On Wed, Mar 13, 2024 at 01:12:28PM +1300, David Steele wrote:
>>
>> Not sure what to look for here. There are no distinct messages for crash
>> recovery. Perhaps there should be?
> 
> The closest thing I can think of here would be "database system was
> not properly shut down; automatic recovery in progress" as we don't
> have InArchiveRecovery, after checking that the canary is missing.  If
> you don't like this suggestion, feel free to say so, of course :)

That works for me. I think I got it confused with "database system was 
interrupted..." when I was looking at the success vs. fail logs.

>> Sure, I added a check for the new log message when recovering with a
>> backup_label.
> 
> +ok($node_replica->log_contains('completed backup recovery with redo LSN'),
> +   'verify backup recovery performed with backup_label');
> 
> Okay for this choice.  I was thinking first about "starting backup
> recovery with redo LSN", closer to the area where the backup_label is
> read.

I think you are right that the start message is better since it can only 
appear once when the backup_label is found. The completed message could 
in theory appear after a restart, though the backup_label must have been 
found at some point.

Regards,
-David