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Slow network performance inside VM
Hello,
I have a server running OpenNebula based on Debian Stretch. I then virtualize using KVM.
I noticed that the network performance in the VM is much slower than directly on the host system.
I ran a script which downloads test files from various mirrors via wget.
Strange is that almost all mirrors in the VM are a lot slower, but others achieve a similar performance as on the host system (Cachefly mirror or IP-Projects speedtest).
I could not yet reproduce what the speed depends on. The system was empty each time the test was run, so no other processes were running in the background.
Anybody have any idea what might be causing this?
I am using a routed network setup on the system.
Comments
Seems traffic going via to different server/route . Check dns entry
Ping difference make impact on speedtest
What network driver are you using? Tried virtio?
The routing is the same, except the vm is also routed through the hostsystem
Somehow virtio wasn't set properly, works now!
Thank you!