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
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