Hello. We can get up to ~90 Gbit/s on XCP-ng's dataplane (we're on OpenVSwitch) between hosts. I'm not that confident in VRs getting such speeds, likely there will be bottlenecks on Dom0 side, but for Shared-type networks there could be potential. We are still working on optimizing how much XCP can squeeze out of a VM before we reach hard limits of its PV controllers. We'd still like to try push as much as we can here.
Lugupidamisega / Best regards, Joann Mõndresku Süsteemiadministraator | Systems Administrator | [email protected] WaveCom AS | ISO 9001, 27001 & 27017 Certified DC and Cloud services Endla 16, Tallinn 10142 | www.wavecom.ee | www.facebook.com/wavecom.ee ----- Original Message ----- From: "Wido den Hollander" <[email protected]> To: "users" <[email protected]>, "Joann Mõndresku" <[email protected]> Sent: Tuesday, April 14, 2026 5:50:43 PM Subject: Re: Cloudstack and 100G networks Op 14-04-2026 om 15:23 schreef Joann Mõndresku: > Hello. > > It looks like CloudStack is utilising an unsigned smallint (up to 65K) for > nw_rate. > Is there a way to unlimit nw_rate for a network offering or are we bound to a > max of 65Gb/s per offering? > Using KVM or XCP-ng? Because are you sure that the network bridges can handle this? I'm a KVM guy and virtio-net struggles to go over 10Gb/s iirc. Wido > Further we noticed that even the default 200 Mb/s rates are actually applying > 25.6Mb/s (!!!) QoS throttle on actual VMs and VRs on XCP-ng platform. > > > Lugupidamisega / Best regards, > > Joann Mõndresku > > > > Süsteemiadministraator | Systems Administrator | [email protected] > > WaveCom AS | ISO 9001, 27001 & 27017 Certified DC and Cloud services > Endla 16, Tallinn 10142 | www.wavecom.ee | www.facebook.com/wavecom.ee >
