does your test use the network? in B what neutron agent do you use for
networking?
openstack and libvirt are, at different level, control plane. you should look
at the differences in the data plane
On June 29, 2015 7:19:45 PM GMT+08:00, "Narayanan, Krishnaprasad"
<naray...@uni-mainz.de> wrote:
>Hello all,
>
>I ran tests under the following settings to measure the IO performance
>of MySQL database. I used Sysbench as the client workload generator. I
>found that the performance of MySQL (both resource utilization and
>application) has degraded by more than 50% after switching from setting
>a) to setting b).
>
>Setting a): Controller & Compute node OS - Ubuntu 12.04, cloud
>software: OpenStack Havana, networking: nova-network, Hypervisor: KVM,
>Libvirt version: 1.1.1, QEMU version: 1.5.0, Host disk write cache:
>enabled, Guest disk cache: none and host OS scheduler: CFQ.
>Setting b): Controller & Compute node OS - Ubuntu 14.04, cloud
>software: OpenStack Icehouse, networking: Neutron, Hypervisor: KVM,
>Libvirt version: 1.2.2, QEMU version: 2.0.0, Host disk write cache:
>enabled, Guest disk cache: none and host OS scheduler: CFQ.
>
>May I know has anybody performed such tests and if yes, can you please
>share details on the IO performance of VMs and the application?
>
>I don't know whether is the right question to ask in this forum. Can
>somebody share information at a high level about the improvements made
>in Libvirt (from version 1.1.1 to 1.2.2) for handling IO requests?
>
>Regards,
>Krishnaprasad
>
>
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