On Tue, Oct 31, 2017 at 2:25 PM, FERNANDO FREDIANI <fernando.frediani@upx.com> wrote:

Hi.

Does the virtualization layer causes any significant impact in the VM performance, even a high CPU VM that justify the use of this feature ?

Depends on your definition of 'significant' and on the workload. Certainly enabling huge pages, NUMA setting and removal of some unneeded devices can help some workloads.
 

DPDK for sure is a fantastic feature for networking environments.

A bit over-rated, for most workloads, if you ask me...
Currently requires a bit too much configuration (in my opinion), but certainly there are workloads who critically need it.
Y.
 


Fernando


On 31/10/2017 05:56, Yaniv Kaul wrote:


On Mon, Oct 30, 2017 at 9:33 PM, Vinícius Ferrão <ferrao@if.ufrj.br> wrote:
Hello John,

This is very interesting news for HPC guys. Accordingly to the blog post there's a new “CPU passthrough” function. Which is interesting.

Do you guys are targeting which market? I’m looking forward for virtual nodes on a HPC environment.

Any intensive workload, CPU and memory bound especially, would benefit from the configuration.
In memory DBs (SAP Hana, Redis and friends) for example, MapReduce (Hadoop), etc. 

For some workloads, low latency networking is also important (especially for nodes inter-communication) and we are looking at DPDK for it. See[1].

Y.



Thanks,
V.

On 30 Oct 2017, at 07:38, John Marks <jmarks@redhat.com> wrote:

Hello!
Just a quick heads up that there is a new post on the oVirt blog:


In a nutshell:

oVirt 4.2.0 Alpha, released on September 28, features a new high performance virtual machine type. It brings VM performance closer to bare metal performance. Read the blog post.

See you on the oVirt blog!

Best,

John
--
John Marks
Technical Writer, oVirt
redhat Israel
Cell: +972 52 8644 491

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