<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Verdana; font-size: 10pt; color: #000000'><span style="font-family: monospace; font-size: medium; background-color: rgb(255, 255, 255);">>>Yes so dataplane is disabled while live migration but you still can't</span><br style="font-family: monospace; font-size: medium;"><span style="font-family: monospace; font-size: medium; background-color: rgb(255, 255, 255);">>>use I/O throttling so PVE would need to disable this if dataplane is on.</span><br style="font-family: monospace; font-size: medium;">>><br style="font-family: monospace; font-size: medium;"><span style="font-family: monospace; font-size: medium; background-color: rgb(255, 255, 255);">>>Also "Image formats are not supported (qcow2, qed, etc).", Hot unplug is</span><br style="font-family: monospace; font-size: medium;"><span style="font-family: monospace; font-size: medium; background-color: rgb(255, 255, 255);">>>not supported. Block jobs (block-stream, drive-mirror, block-commit) are</span><br style="font-family: monospace; font-size: medium;"><span style="font-family: monospace; font-size: medium; background-color: rgb(255, 255, 255);">>>not supported.</span><br style="font-family: monospace; font-size: medium;"><div><font face="monospace"><br></font></div><div><font face="monospace">Yes, they are a lot of missing features. </font></div><div><font face="monospace">Maybe next year it'll be ok ;) Just need to wait a little more.</font></div><div><font face="monospace"><br></font><div style="font-family: Verdana; font-size: 10pt;"><br></div><div id="94879180-9244-4670-8790-002e21e44846" style="font-family: Verdana; font-size: 10pt;"><br></div><hr id="zwchr" style="font-family: Verdana; font-size: 10pt;"><div style="font-family: Helvetica, Arial, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); font-weight: normal; font-style: normal; text-decoration: none;"><b>De: </b>"Stefan Priebe - Profihost AG" <s.priebe@profihost.ag><br><b>À: </b>"Alexandre DERUMIER" <aderumier@odiso.com><br><b>Cc: </b>"Cesar Peschiera" <brain@click.com.py>, pve-devel@pve.proxmox.com<br><b>Envoyé: </b>Jeudi 6 Février 2014 09:24:28<br><b>Objet: </b>Re: [pve-devel] Virtio--Blk-Data-Plane deliver much higher I/O rates than both of its major competing hypervisors<br><br>Am 06.02.2014 09:20, schrieb Alexandre DERUMIER:<br>>>> A that was the culprit. Something without live migration isn't usable at <br>>>> least to me. <br>> <br>> Just found that :)<br>> <br>> dataplane: enable virtio-blk x-data-plane=on live migration<br>> <br>> http://git.qemu.org/?p=qemu.git;a=commit;h=84db52d059f3296abf7783968645c4a96d21b099<br>> <br>> <br>> So maybe it's possible now :)<br><br>Yes so dataplane is disabled while live migration but you still can't<br>use I/O throttling so PVE would need to disable this if dataplane is on.<br><br>Also "Image formats are not supported (qcow2, qed, etc).", Hot unplug is<br>not supported. Block jobs (block-stream, drive-mirror, block-commit) are<br>not supported.<br><br>So this would add so may exceptions to pve... i don't thing anybody<br>wants that.<br><br>Stefan<br><br><br>> <br>> ----- Mail original ----- <br>> <br>> De: "Stefan Priebe - Profihost AG" <s.priebe@profihost.ag> <br>> À: "Alexandre DERUMIER" <aderumier@odiso.com> <br>> Cc: "Cesar Peschiera" <brain@click.com.py>, pve-devel@pve.proxmox.com <br>> Envoyé: Jeudi 6 Février 2014 09:15:10 <br>> Objet: Re: [pve-devel] Virtio--Blk-Data-Plane deliver much higher I/O rates than both of its major competing hypervisors <br>> <br>> Hi, <br>> Am 06.02.2014 09:12, schrieb Alexandre DERUMIER: <br>>>>> If i remember correctly there were some reasons why it is not available <br>>>>> in PVE right now. <br>>><br>>> I think they are no technical objection and not to difficult to implement. (I need to read the qemu doc) <br>>><br>>> (But live-migration don't work with Virtio--Blk-Data-Plane) <br>> <br>> A that was the culprit. Something without live migration isn't usable at <br>> least to me. <br>> <br>> Stefan <br>> <br>> <br>>> ----- Mail original ----- <br>>><br>>> De: "Stefan Priebe - Profihost AG" <s.priebe@profihost.ag> <br>>> À: "Cesar Peschiera" <brain@click.com.py>, pve-devel@pve.proxmox.com <br>>> Envoyé: Jeudi 6 Février 2014 08:37:49 <br>>> Objet: Re: [pve-devel] Virtio--Blk-Data-Plane deliver much higher I/O rates than both of its major competing hypervisors <br>>><br>>> Yes that's why i'm always staring at Virtio--Blk-Data-Plane but isn't <br>>> it unstable right now and has a lot of missing features? <br>>><br>>> If i remember correctly there were some reasons why it is not available <br>>> in PVE right now. <br>>><br>>> Stefan <br>>><br>>> Am 06.02.2014 08:11, schrieb Cesar Peschiera: <br>>>> Hi people <br>>>><br>>>> Only as comment for you (if you don't know it), I bring a link PDF of IBM <br>>>> that say between many things: <br>>>><br>>>> KVM with Virtio--Blk-Data-Plane deliver much higher I/O rates than both <br>>>> of its major competing hypervisors <br>>>><br>>>> KVM with virtio-blk technology could achieve only about 150,000 I/O <br>>>> operations per second for a single guest <br>>>><br>>>> KVM with Virtio--Blk-Data-Plane: (Technology Preview in RHEL 6.4) more than <br>>>> 1.5 million IOPS for random I/O requests that were 4KB or less <br>>>> - 49% higher than VMware vSphere 5.1 <br>>>> - The highest storage I/O performance ever reported in a virtualized <br>>>> environment <br>>>><br>>>> VMware vSphere 5.1: recently indicated that it could achieve almost 1.1 <br>>>> million IOPS <br>>>><br>>>> In addition, KVM with virtio-blk-data-plane technology can achieve much <br>>>> higher I/O rates than what Microsoft has claimed for its Hyper-V hypervisor <br>>>> across multiple block sizes <br>>>><br>>>> ftp://public.dhe.ibm.com/linux/pdfs/KVM_Virtualized_IO_Performance_Paper_v2.pdf <br>>>><br>>>><br>>>> Best regards <br>>>> Cesar <br>>>><br>>>> _______________________________________________ <br>>>> pve-devel mailing list <br>>>> pve-devel@pve.proxmox.com <br>>>> http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel <br>>> _______________________________________________ <br>>> pve-devel mailing list <br>>> pve-devel@pve.proxmox.com <br>>> http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel <br>>><br></div><br></div></div></body></html>