Hi, hackers
> The issue here is pg_rewind looks into control file to determine the
> soruce timeline, because the control file is not updated until the
> first checkpoint ends after promotion finishes, even though file
> blocks are already diverged.
>
> Even in that case history file for the new timeline is already
> created, so searching for the latest history file works.
I think this change is a good one because if I want
pg_rewind to run automatically after a promotion,
I don't have to wait for the checkpoint to complete.
The attached patch is Horiguchi-san's patch with
additional tests. The tests are based on James's tests,
"010_no_checkpoint_after_promotion.pl" tests that
pg_rewind is successfully executed without running
checkpoint after promote.
Best Regards,
Keisuke Kuroda
NTT COMWARE