case class TopNLogic[K](heavyHittersN: Int) extends HeavyHittersLogic[K] with Product with Serializable
Tracks the top N heavy hitters, where N
is defined by heavyHittersN
.
Warning: top-N computations are not associative. The effect is that a top-N CMS has an ordering bias (with regard to heavy hitters) when merging instances. This means merging heavy hitters across CMS instances may lead to incorrect, biased results: the outcome is biased by the order in which CMS instances / heavy hitters are being merged, with the rule of thumb being that the earlier a set of heavy hitters is being merged, the more likely is the end result biased towards these heavy hitters.
- See also
Discussion in Algebird issue 353
Linear Supertypes
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- def purgeHeavyHitters(cms: CMS[K])(hitters: HeavyHitters[K]): HeavyHitters[K]
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