Hello.
That's how TCP throughput mediation works. In basic case, you cannot
canot fully saturate link by two opposite TCP connections regardless of
using Open vSwitch.
There's one dirty hack that can override this behavior: you could use
qdisc on interface that prioritize packets that have ACK bit set over
those that don't in same connection. It will saturate link, but may lead
to other issues on certain types of traffic (because of packet
reordering), so [almost] nobody use it in real life.
Multiple parallel connections in same direction also saturate link more
evenly.
15.03.2021 6:33, Hongyi Zhao пишет:
I install the pve on an I7 8886U machine with 6 full-duplex gigabit
network cards. The network configuration of the pve host is shown
below:
<quote>
root@pve:~# cat /etc/network/interfaces
# network interface settings; autogenerated
# Please do NOT modify this file directly, unless you know what
# you're doing.
#
# If you want to manage parts of the network configuration manually,
# please utilize the 'source' or 'source-directory' directives to do
# so.
# PVE will preserve these directives, but will NOT read its network
# configuration from sourced files, so do not attempt to move any of
# the PVE managed interfaces into external files!
auto lo
iface lo inet loopback
auto enp1s0
iface enp1s0 inet manual
ovs_type OVSPort
ovs_bridge vmbr0
auto enp2s0
iface enp2s0 inet manual
ovs_type OVSPort
ovs_bridge vmbr1
iface enp3s0 inet manual
iface enp4s0 inet manual
iface enp5s0 inet manual
iface enp6s0 inet manual
auto vmbr0
iface vmbr0 inet static
address 192.168.10.254/24
gateway 192.168.10.1
ovs_type OVSBridge
ovs_ports enp1s0
auto vmbr1
iface vmbr1 inet manual
ovs_type OVSBridge
ovs_ports enp2s0
</quote>
Now I use scp to transfer file from pve (192.168.10.254) to another
physical machine (192.168.10.100) or vice versa, but run the following
two commands in order:
root@pve:~# scp macOS-10.13.qcow2 [email protected]:/dev/null
[email protected]'s password:
macOS-10.13.qcow2 37% 6209MB 83.6MB/s 02:01 ETA
werner@X10DAi:~$ scp macOS-10.13.qcow2 [email protected]:/dev/null
[email protected]'s password:
macOS-10.13.qcow2 30% 1408MB
53.5MB/s 01:00 ETA
As you can see, the show different network transfer speed. OTOH, if I
run the above two commands simultaneously, the results will look like
the following:
werner@X10DAi:~$ scp macOS-10.13.qcow2 [email protected]:/dev/null
[email protected]'s password:
macOS-10.13.qcow2 17% 811MB
26.0MB/s 02:26 ETA
root@pve:~# scp macOS-10.13.qcow2 [email protected]:/dev/null
[email protected]'s password:
macOS-10.13.qcow2 13% 2205MB 51.7MB/s 04:34 ETA
Any hints for the above observations and results will be highly appreciated.
Regards
_______________________________________________
pve-user mailing list
[email protected]
https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-user
