> The paper explicitly says the nlog implements the incremental computation
> for any state change in the input table, "incremental computation allows us
> to recompute only the affected state and push the delta down to the network
> edge." Therefore, IMO your implementation is applicable to either OVN or
> the NVP [2]. Please correct me if I am wrong.

You are correct. They are going to have similar behavior with respect to 
computation
method. What I meant previously is that we could not compare the performance 
just 
based on the computation engine. Other factors, such as how database interacts 
with
the engine and how the computation results are dispensed to hosts, will also 
have impact.

> Some error message is as follows:
> Applying: OVN: datalog man page
> /root/Downloads/ovs/.git/rebase-apply/patch:34: trailing whitespace.

Thanks for pointing out this. I will remove those white spaces in later patch.

-- Yusheng
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