James Courtier-Dutton via GLLUG wrote:
On Fri, 12 Jun 2020 at 08:55, Tim Woodall via GLLUG
wrote:
On Tue, 9 Jun 2020, Ken Smith via GLLUG wrote:
Hi All,
While in lockdown I decided to do some performance testing on KVM.
Interesting, I've been looking into this myself trying to improve
On Fri, 12 Jun 2020 at 08:55, Tim Woodall via GLLUG
wrote:
>
> On Tue, 9 Jun 2020, Ken Smith via GLLUG wrote:
>
> > Hi All,
> >
> > While in lockdown I decided to do some performance testing on KVM. I had
> > believed that passing a block device through to a guest rather than using a
> > QCOW2
On Tue, 9 Jun 2020, Ken Smith via GLLUG wrote:
Hi All,
While in lockdown I decided to do some performance testing on KVM. I had
believed that passing a block device through to a guest rather than using a
QCOW2 file would get better performance. I wanted to see whether that was
true and
https://www.architecting.it/blog/wekaio-matrix-performance-das/
On Tue, 9 Jun 2020 at 21:52, Ken Smith via GLLUG
wrote:
> Hi All,
>
> While in lockdown I decided to do some performance testing on KVM. I had
> believed that passing a block device through to a guest rather than
> using a QCOW2
Mike Brodbelt via GLLUG wrote:
On 09/06/2020 22:52, Ken Smith via GLLUG wrote:
I can' t help thinking that there must be something more behind a
drop from 60MB/s to 15MB/s in write performance
Can't speak to your exact bottleneck here, but I think I'd try and
eliminate your disk
On 09/06/2020 22:52, Ken Smith via GLLUG wrote:
Indeed. So wouldn't passing a block device from the host through to the
guest minimise the 'components' that are 'in the way'
I can' t help thinking that there must be something more behind a drop
from 60MB/s to 15MB/s in write performance
Martin A. Brooks via GLLUG wrote:
The more levels of indirection you have between any 2 components in a
system the slower stuff will move.
Indeed. So wouldn't passing a block device from the host through to the
guest minimise the 'components' that are 'in the way'
I can' t help thinking
On 2020-06-09 21:51, Ken Smith via GLLUG wrote:
What to conclude? Is the hardware just not fast enough? Are newer
processors better at abstracting the VM guests with less performance
impact? What am I missing??
The more levels of indirection you have between any 2 components in a
system the
Hi All,
While in lockdown I decided to do some performance testing on KVM. I had
believed that passing a block device through to a guest rather than
using a QCOW2 file would get better performance. I wanted to see whether
that was true and indeed whether using iSCSI storage was any
