To be clear, this is a known issue that needs attention: it is not a benchmarking setup problem. Network throughput has a similar problem and needs similar attention. Cloud is not a fringe server workload. -sc
On Fri, Feb 5, 2021 at 3:00 PM Jin Guojun[VFF] <jguo...@gmail.com> wrote: > On 2021-02-05 12:45, Gunther Schadow wrote: > > Gordon Bergling wrote: > >> Can you verify your feelings by numbers? > > > > Yes, like I said > > > >>> Not by a few % points, but by factors if not an order of magnitude! > > > > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253261 > > > > Do this: > > > > dd if=/dev/zero of=/dev/nvd2 bs=100M status=progress > > > > and you see that it's writing with the "whopping" speed of 70 MB/s. > > > > That used to be good, but it is no longer good. Compare Amazon Linux > > doing > > the same thing at 300 MB/s. > > > > Now, when you put a file system over it, zfs or ufs, then instantly the > > performance gets better: > > > > newfs /dev/nvd2 > > mount /dev/nvd2 /mnt > > dd if=/dev/zero of=/mnt/test bs=100M status=progress > > > > now that works at about 250 MB/s. Decent. So, problem solved? > > It is not clear if this compares Apple to Apple. > > What disk drives and CPUs are on FreeBSD, and what are disk drive(s) and > CPU(s) on AWS? > > Knowing the drive brand and models will tell approximately the disk > throughput. Agree, 70MB/s is slow for modern disks, but your information > does not provide clue why this could be slow. > > Can this setup get 250MB/s on FreeBSD 11.4? or 300MB/s with Ubuntu 16.04 > on the same hardware? > > -Jin > > _______________________________________________ > freebsd-performance@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-performance > To unsubscribe, send any mail to " > freebsd-performance-unsubscr...@freebsd.org" > _______________________________________________ freebsd-performance@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "freebsd-performance-unsubscr...@freebsd.org"
