Open Stack

Hi all,

is there a way to improve network performance on my instances with VXLAN? I
changed the MTU on physical interfaces to 1600, still performance it's
lower than in baremetal hosts:

*On Instance:*

[root at vms6-149a71e8-1f2a-4d6e-bba4-e70dfa42b289 ~]# iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 10.0.66.35, port 42900
[  5] local 10.0.66.38 port 5201 connected to 10.0.66.35 port 42901
[ ID] Interval           Transfer     Bandwidth
[  5]   0.00-1.00   sec   189 MBytes  1.59 Gbits/sec
[  5]   1.00-2.00   sec   245 MBytes  2.06 Gbits/sec
[  5]   2.00-3.00   sec   213 MBytes  1.78 Gbits/sec
[  5]   3.00-4.00   sec   227 MBytes  1.91 Gbits/sec
[  5]   4.00-5.00   sec   235 MBytes  1.97 Gbits/sec
[  5]   5.00-6.00   sec   235 MBytes  1.97 Gbits/sec
[  5]   6.00-7.00   sec   234 MBytes  1.96 Gbits/sec
[  5]   7.00-8.00   sec   235 MBytes  1.97 Gbits/sec
[  5]   8.00-9.00   sec   244 MBytes  2.05 Gbits/sec
[  5]   9.00-10.00  sec   234 MBytes  1.97 Gbits/sec
[  5]  10.00-10.04  sec  9.30 MBytes  1.97 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  5]   0.00-10.04  sec  2.25 GBytes  1.92 Gbits/sec   43             sender
[  5]   0.00-10.04  sec  2.25 GBytes  1.92 Gbits/sec
 receiver


*On baremetal:*
iperf3 -s
warning: this system does not seem to support IPv6 - trying IPv4
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 172.16.21.4, port 51408
[  5] local 172.16.21.5 port 5201 connected to 172.16.21.4 port 51409
[ ID] Interval           Transfer     Bandwidth
[  5]   0.00-1.00   sec  1.02 GBytes  8.76 Gbits/sec
[  5]   1.00-2.00   sec  1.07 GBytes  9.23 Gbits/sec
[  5]   2.00-3.00   sec  1.08 GBytes  9.29 Gbits/sec
[  5]   3.00-4.00   sec  1.08 GBytes  9.27 Gbits/sec
[  5]   4.00-5.00   sec  1.08 GBytes  9.27 Gbits/sec
[  5]   5.00-6.00   sec  1.08 GBytes  9.28 Gbits/sec
[  5]   6.00-7.00   sec  1.08 GBytes  9.28 Gbits/sec
[  5]   7.00-8.00   sec  1.08 GBytes  9.29 Gbits/sec
[  5]   8.00-9.00   sec  1.08 GBytes  9.28 Gbits/sec
[  5]   9.00-10.00  sec  1.08 GBytes  9.29 Gbits/sec
[  5]  10.00-10.04  sec  42.8 MBytes  9.31 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  5]   0.00-10.04  sec  10.8 GBytes  9.23 Gbits/sec   95             sender
[  5]   0.00-10.04  sec  10.8 GBytes  9.22 Gbits/sec
 receiver


Thanks,
Pedro Sousa
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