[pve-devel] Virtio--Blk-Data-Plane deliver much higher I/O rates than both of its major competing hypervisors

[Alexandre DERUMIER]

>>A that was the culprit. Something without live migration isn't usable at 
>>least to me. 

Just found that :)

dataplane: enable virtio-blk x-data-plane=on live migration

http://git.qemu.org/?p=qemu.git;a=commit;h=84db52d059f3296abf7783968645c4a96d21b099


So maybe it's possible now :)


----- Mail original ----- 

De: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: "Cesar Peschiera" <brain at click.com.py>, pve-devel at pve.proxmox.com 
Envoyé: Jeudi 6 Février 2014 09:15:10 
Objet: Re: [pve-devel] Virtio--Blk-Data-Plane deliver much higher I/O rates than both of its major competing hypervisors 

Hi, 
Am 06.02.2014 09:12, schrieb Alexandre DERUMIER: 
>>> If i remember correctly there were some reasons why it is not available 
>>> in PVE right now. 
> 
> I think they are no technical objection and not to difficult to implement. (I need to read the qemu doc) 
> 
> (But live-migration don't work with Virtio--Blk-Data-Plane) 

A that was the culprit. Something without live migration isn't usable at 
least to me. 

Stefan 


> ----- Mail original ----- 
> 
> De: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
> À: "Cesar Peschiera" <brain at click.com.py>, pve-devel at pve.proxmox.com 
> Envoyé: Jeudi 6 Février 2014 08:37:49 
> Objet: Re: [pve-devel] Virtio--Blk-Data-Plane deliver much higher I/O rates than both of its major competing hypervisors 
> 
> Yes that's why i'm always staring at Virtio--Blk-Data-Plane but isn't 
> it unstable right now and has a lot of missing features? 
> 
> If i remember correctly there were some reasons why it is not available 
> in PVE right now. 
> 
> Stefan 
> 
> Am 06.02.2014 08:11, schrieb Cesar Peschiera: 
>> Hi people 
>> 
>> Only as comment for you (if you don't know it), I bring a link PDF of IBM 
>> that say between many things: 
>> 
>> KVM with Virtio--Blk-Data-Plane deliver much higher I/O rates than both 
>> of its major competing hypervisors 
>> 
>> KVM with virtio-blk technology could achieve only about 150,000 I/O 
>> operations per second for a single guest 
>> 
>> KVM with Virtio--Blk-Data-Plane: (Technology Preview in RHEL 6.4) more than 
>> 1.5 million IOPS for random I/O requests that were 4KB or less 
>> - 49% higher than VMware vSphere 5.1 
>> - The highest storage I/O performance ever reported in a virtualized 
>> environment 
>> 
>> VMware vSphere 5.1: recently indicated that it could achieve almost 1.1 
>> million IOPS 
>> 
>> In addition, KVM with virtio-blk-data-plane technology can achieve much 
>> higher I/O rates than what Microsoft has claimed for its Hyper-V hypervisor 
>> across multiple block sizes 
>> 
>> ftp://public.dhe.ibm.com/linux/pdfs/KVM_Virtualized_IO_Performance_Paper_v2.pdf 
>> 
>> 
>> Best regards 
>> Cesar 
>> 
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