On Jan 9, 2014, at 3:16 AM, Markus Stockhausen wrote:
>
> We see a quite a heavy latency penalty using KVM VirtIO disks in comparison
> to ESX. Doing one I/O onto disk inside a VM usually adds 370us of overhead in
> the virtualisation layer. This has been tested with VirtIO-SCSI and windows
> g
> Von: sander.grendel...@gmail.com
> Gesendet: Donnerstag, 9. Januar 2014 10:32
> An: Markus Stockhausen
> Cc: users@ovirt.org
> Betreff: Re: [Users] VirtIO disk latency
>
> On Thu, Jan 9, 2014 at 10:16 AM, Markus Stockhausen
> wrote:
> ...
> > - access NFS in
On Thu, Jan 9, 2014 at 10:16 AM, Markus Stockhausen
wrote:
...
> - access NFS inside the hypervisor - 12.000 I/Os per second - or 83us latency
> - access DISK inside ESX VM that resides on NFS - 8000 I/Os per second - or
> 125us latency
> - access DISK inside OVirt VM that resides on NFS - 2200 I
Hello,
coming from the "low cost NFS storage thread" I will open a new one
about a topic that might be interesting for others too.
We see a quite a heavy latency penalty using KVM VirtIO disks in comparison
to ESX. Doing one I/O onto disk inside a VM usually adds 370us of overhead in
the virtuali
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