Anyone have experience with the charms to be able to set the MTU to jumbo
packets?
Right now in testing to see if it would work we had to do this:
for i in `ip a | grep mtu| egrep -ve "eth0|eth1|eth2|eth3|bond0|lo|juju-br0" |
awk '{print $2}' | awk -F: '{print $1}'`; do ip link set ${i} mtu 8900; done
We were able to get 6.5 Gigabit/s throughput with enabling jumbo packets.
ubuntu@3-885bd897-3655-42ab-b0b9-a97b31826f88:~$ sudo ip link set dev ens3 mtu
8000
ubuntu@3-885bd897-3655-42ab-b0b9-a97b31826f88:~$ sudo iperf -c 192.168.10.116
-i1 -t 10 -m
…
[ 3] local 192.168.10.115 port 33920 connected with 192.168.10.116 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 1.0 sec 845 MBytes 7.09 Gbits/sec
[ 3] 1.0- 2.0 sec 781 MBytes 6.55 Gbits/sec
[ 3] 2.0- 3.0 sec 762 MBytes 6.40 Gbits/sec
[ 3] 3.0- 4.0 sec 758 MBytes 6.36 Gbits/sec
Any openstack charmers have some insight?
- Ed
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