Class

com.twitter.algebird

TopNLogic

Related Doc: package algebird

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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
Serializable, Product, Equals, HeavyHittersLogic[K], Serializable, AnyRef, Any
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  1. TopNLogic
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Instance Constructors

  1. new TopNLogic(heavyHittersN: Int)

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Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any

  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  4. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  5. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  6. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  7. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  8. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any

  9. val heavyHittersN: Int

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  10. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

  11. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  12. final def notify(): Unit

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    Definition Classes
    AnyRef

  13. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

  14. def purgeHeavyHitters(cms: CMS[K])(hitters: HeavyHitters[K]): HeavyHitters[K]

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    Definition Classes
    TopNLogic → HeavyHittersLogic

  15. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef

  16. def updateHeavyHitters(cms: CMS[K])(left: HeavyHitters[K], right: HeavyHitters[K]): HeavyHitters[K]

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    Definition Classes
    HeavyHittersLogic

  17. def updateHeavyHitters(oldCms: CMS[K], newCms: CMS[K])(hhs: HeavyHitters[K], item: K, count: Long): HeavyHitters[K]

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    Definition Classes
    HeavyHittersLogic

  18. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  19. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  20. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from HeavyHittersLogic[K]

Inherited from Serializable

Inherited from AnyRef

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