akka.cluster
Class EWMA$

java.lang.Object
  akka.cluster.EWMA$

All Implemented Interfaces:

java.io.Serializable

public class EWMA$
extends java.lang.Object
implements scala.Serializable

See Also:

Serialized Form

Field Summary

static EWMA$

MODULE$ Static reference to the singleton instance of this Scala object.

Constructor Summary

EWMA$()

Method Summary

double

alpha(scala.concurrent.duration.FiniteDuration halfLife, scala.concurrent.duration.FiniteDuration collectInterval) Calculate the alpha (decay factor) used in EWMA from specified half-life and interval between observations.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MODULE$

public static final EWMA$ MODULE$

Static reference to the singleton instance of this Scala object.

Constructor Detail

EWMA$

public EWMA$()

Method Detail

alpha

public double alpha(scala.concurrent.duration.FiniteDuration halfLife,
                    scala.concurrent.duration.FiniteDuration collectInterval)

Calculate the alpha (decay factor) used in EWMA from specified half-life and interval between observations. Half-life is the interval over which the weights decrease by a factor of two. The relevance of each data sample is halved for every passing half-life duration, i.e. after 4 times the half-life, a data sample’s relevance is reduced to 6% of its original relevance. The initial relevance of a data sample is given by 1 – 0.5 ^ (collect-interval / half-life).

Parameters:

halfLife - (undocumented)

collectInterval - (undocumented)

Returns:

(undocumented)