Re: Performance concerns with large (2000-3000) number of tc classes

Linux Advanced Routing and Traffic Control

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>
> Hi All,
>
> I am in the early stages of planning a shared hosting platform that
> will use tc to limit outbound bandwidth usage.
>
> Before I get too far along, I wonder if anyone has direct experience
> with large numbers of classes, or can explain why it is a bad idea?
>
> In other words, what sort of performance degradation, if any, would
> there be in processing a qdisc with 5 classes vs one with 2000?
>
> Thanks,
>
> Joseph

Hi, Joseph.

Difficulty of scheme with big number of classes/disciplines is in
classification.
Best choice in this case is u32 filter with hashing.

--
Anton.
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