On Mon, Jul 18, 2022 at 11:50 AM Gary Buhrmaster gary.buhrmaster@gmail.com wrote:
On Mon, Jul 18, 2022 at 6:44 AM Petr Lautrbach plautrba@redhat.com wrote:
Dan Čermák dan.cermak@cgc-instruments.de writes:
Just out of curiosity, how large is the speedup typically?
It depends on the number of threads your machine has. But you could get some data for comparison using `fixfiles -T 1 restore` and `fixfiles -T 0 restore` on a running system. The following times are reported on my workstation:
Has anyone run such a test on a system using classic ("spinning rust") HDDs? It is sometimes the case that parallelizing activities that are I/O intensive can result in excessive seek activity that can result in rather elongated elapsed times (much worse than single threaded operation).
If that turns out to be the case, it should be possible to detect the use of an SSD vs. a spinning-disc HDD and trigger the `-T` argument appropriately. I don't know if the Change Proposers have plans for that.