com.twitter.algebird

TopPctLogic

case class TopPctLogic[K](heavyHittersPct: Double) extends HeavyHittersLogic[K] with Product with Serializable

Finds all heavy hitters, i.e., elements in the stream that appear at least (heavyHittersPct * totalCount) times.

Every item that appears at least (heavyHittersPct * totalCount) times is output, and with probability p >= 1 - delta, no item whose count is less than (heavyHittersPct - eps) * totalCount is output.

This also means that this parameter is an upper bound on the number of heavy hitters that will be tracked: the set of heavy hitters contains at most 1 / heavyHittersPct elements. For example, if heavyHittersPct=0.01 (or 0.25), then at most 1 / 0.01 = 100 items (or 1 / 0.25 = 4 items) will be tracked/returned as heavy hitters. This parameter can thus control the memory footprint required for tracking heavy hitters.

Linear Supertypes
Serializable, Product, Equals, HeavyHittersLogic[K], Serializable, AnyRef, Any
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  1. TopPctLogic
  2. Serializable
  3. Product
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  5. HeavyHittersLogic
  6. Serializable
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Instance Constructors

  1. new TopPctLogic(heavyHittersPct: Double)

Value Members

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

    Definition Classes
    AnyRef
  2. final def !=(arg0: Any): Boolean

    Definition Classes
    Any
  3. final def ##(): Int

    Definition Classes
    AnyRef → Any
  4. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  5. final def ==(arg0: Any): Boolean

    Definition Classes
    Any
  6. final def asInstanceOf[T0]: T0

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  7. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  8. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  9. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  10. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any
  11. val heavyHittersPct: Double

  12. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any
  13. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  14. final def notify(): Unit

    Definition Classes
    AnyRef
  15. final def notifyAll(): Unit

    Definition Classes
    AnyRef
  16. def purgeHeavyHitters(cms: CMS[K])(hitters: HeavyHitters[K]): HeavyHitters[K]

    Definition Classes
    TopPctLogicHeavyHittersLogic
  17. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  18. def updateHeavyHitters(cms: CMS[K])(left: HeavyHitters[K], right: HeavyHitters[K]): HeavyHitters[K]

    Definition Classes
    HeavyHittersLogic
  19. def updateHeavyHitters(oldCms: CMS[K], newCms: CMS[K])(hhs: HeavyHitters[K], item: K, count: Long): HeavyHitters[K]

    Definition Classes
    HeavyHittersLogic
  20. final def wait(): Unit

    Definition Classes
    AnyRef
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    @throws( ... )
  21. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
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    @throws( ... )
  22. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
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    @throws( ... )

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from HeavyHittersLogic[K]

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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