On 8/17/23 14:00, Frédéric Yhuel wrote: > On 8/17/23 09:32, Frédéric Yhuel wrote: >> On 8/10/23 17:06, Juan José Santamaría Flecha wrote: >>> Recently I restored a database from a directory format backup and >>> having this feature would have been quite useful >> >> Thanks for resuming work on this patch. I forgot to mention this in my >> original email, but the motivation was also to speed up the restore >> process. Parallelizing the FK checks could make a huge difference in >> certain cases. We should probably provide such a test case (with perf >> numbers), and maybe this is it what Robert asked for. > > I have attached two scripts which demonstrate the following problems:
Thanks for the scripts, but I think Robert's concerns come from the safety, and not the performance, of the parallel operation.
Proving its vulnerability could be easy with a counter example, but assuring its safety is trickier. What test would suffice to do that?
