Virtual Networking NIC limits

[Bmoney]

If I have a virtual KVM on my media server for torrenting as a quazi safe box. 
When I transfer the file from the Virtual box to host machine what can I make my Virtual nics speeds? What are my limits etc. 
 

[Electronics Wizardy]

What type of nic do you have? What os?

 

I was messing with iperf on a dual 1366 system and getting about 27gb/s with a virtio nic and bridged vms a while ago. CPU limited, so a newer system should be faster

[Bmoney]

7 minutes ago, Electronics Wizardy said:

What type of nic do you have? What os?

 

I was messing with iperf on a dual 1366 system and getting about 27gb/s with a virtio nic and bridged vms a while ago. CPU limited, so a newer system should be faster

I will be putting a dual 10 GBE card in but it being virtual would it be limit but the physical nic I have? Ubuntu 19.XX 
It will be a Treadripp 2950X 

[leadeater]

When you're doing VM to same host physical NICs are not used at all, it's all done in memory and DMA.

[Electronics Wizardy]

1 minute ago, Bmoney said:

I will be putting a dual 10 GBE card in but it being virtual would it be limit but the physical hardware I have? Ubuntu 19.XX 
It will be a Treadripp 2950X 

Im assuming your using kvm.

 

Should be able to reach that speed with virtual nics, but the better way to go is with nics that have sr-iov so they cpu doesn't have to handle the networking.

[Windows7ge]

You would be limited by the speed of the physical NIC (10Gbit in this case) but as Electronics Wizardry was saying about virtio and I now want to test myself, virtual nics talking directly to each other that don't operate on a set speed (like a generic e1000) should have the capacity to go as fast as the rest of the system will allow it (as leadeater entailed).

 

Will give this a try on my Dual LGA2011 server. Let's see some big numbers.

If you want to go faster than 10Gbit and assuming you have PCI_e SSD you may be able to aggregate the two in such a way that one client can achieve over 1GB/s but it's a little finicky to setup and doesn't always give the desired results.