hi all:
I am going to implement the meter speed limit. I read the book of
"ovs-ofctl.pdf " about the instructions of burst. In this pdf book , the
instructions of burst is : If multiple bands' rate is exceeded,then the band
with the highest rate among the exceeded bands is selected . It's a bit
confused for me .
I think whether this burst problem is complicated . for example,
ovs-ofctl add-meter br1 meter=1, kbps,burst, band=type=drop, rate = 3000,
burst_size=5000 .
That's enough and also very easy to understand. if download speed is more than
3000 kbps, then just discarding the packages.
But the burst is hard to understand. According to my own understanding (just
think about TC) , we can see burst to be a buffer bucket. If there is nobody
use bandwidth, or bandwidth rate is less then 3000 kbps , the token will
accumulate in the bucket, but the maximum value is 5000 kbps. Next time the
user can use 5000 kbps bandwidth but only in a second. If user can use up 3000
kbps bandwidth ,then it will be limited at 3000 kbps.
Now ovs allow to set multiple band values , this is a little worse.
just for example .
ovs-ofctl add-meter br1 meter=1, kbps,burst, band=type=drop, rate = 3000,
burst_size=5000 type=drop, rate = 4000, burst_size=6000 .
I cant understand this . if according to ovs-ofctl.pdf , when rate could up
5000, then it limit value is 4000. when rate could up 6000, then it limite
value is 3000 . This is not very reasonable, we have bein in the case of a
speed limit . Can be more than 5000 kbps , has a great deal of randomness.
How to design the burst in here , has some suggestions ?
_______________________________________________
discuss mailing list
[email protected]
https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
