On Thu, Jun 20, 2013 at 3:45 PM, Anton 'EvilMan' Danilov <littlesmilingcloud@xxxxxxxxx> wrote: >> >> 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. > Thanks for the suggestions. The idea was to use cgroup net_cls.classid to tag packets and filter based on that. If I go with some hash scheme, what might a good maximum depth be? Or width, depending on how one looks at it I suppose. -- Joseph -- To unsubscribe from this list: send the line "unsubscribe lartc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
