[openstack-dev] [neutron] [Qos] Question about rate limit for VM use OVS

Joe Jiang ifzing at 126.com
Fri Jun 20 08:24:18 UTC 2014

Hi folks,
Anyone try that  rate limit configuration for OVS(port)?
Now i am trying to implement  it on my ovs_lib.py, actually it just call OVS command[1].

There is a way to do that for me:
> sudo ovs-vsctl set port tap42d7bb69-68 qos=@newqos \
             -- --id=@newqos create qos type=linux-htb \
             other-config:max-rate=200000000 queues=0=@q0\ \
             -- --id=@q0 create queue \
             other-config:min-rate=200000000 \

Then i test it use iperf, the vm ingress rate limit just work fine about 25MB/s. but the vm egress rate is as well as "None QoS", close to the eth nic on host speed.
 Can anybody explain me why my getting fail? 



Kind regards,
Mr. Joe Jiang
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