Hi > on 2019/9/2 16:54, 崔恒香 wrote: > The port_security function is disabled.But in the S version environment, > adding a lot of flows on br-int. Does this slow down the creation of VM? > why adding flows on S but not equivalent on O? True,if you want to compared the performance of the Stein and Ocata, you should keep their configuration as the same, otherwise it's not representative. > sure too many flows take performance down. @崔恒香 I think you can set the configuration item " vif_plugging_is_fatal=False" [1] in the nova-compute.conf, and then compare the performance of Ocata and Stein version by creating the same quantity servers. And you can combine with the configuration item " vif_plugging_timeout" to use. This way, you can verify if you are creating servers slow because of network. [1] https://docs.openstack.org/nova/stein/configuration/config.html#DEFAULT.vif_plugging_is_fatal [2] https://docs.openstack.org/nova/stein/configuration/config.html#DEFAULT.vif_plugging_timeout > regards. Brin Zhang