Why is it that when I run FreeBSD in a local KVM, it behaves normal, but when it run it in our OpenStack cloud, IO is painfully slow?

[rainer at ultra-secure.de]

Am 2020-10-26 17:25, schrieb rainer at ultra-secure.de:
> Hi,
> 
> I uploaded the qcow2 image of 12.2RC3 and a recent 13-snapshot to our
> Openstack Cloud.
> 
> I use dc3dd wipe to test IO because it eliminates the filesystem.
> 
> I don't really have a particular fast SSD in my office PC, but I get
> around 100MB/s from writing zeros to the harddisk in CentOS.
> I also get about 100MB/s on FreeBSD on my local PC.
> 
> 

Sorry, I wanted to save this for later editing, but clicked send.

I get maybe 20% IO performance in FreeBSD on Openstack.

I'll add more information later.