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java.lang.Objectorg.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.CostFunction
public abstract static class StochasticLoadBalancer.CostFunction
Base class of StochasticLoadBalancer's Cost Functions.
Method Summary | |
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protected double |
costFromArray(double[] stats)
Function to compute a scaled cost using DescriptiveStatistics . |
protected double |
scale(double min,
double max,
double value)
Scale the value between 0 and 1. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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protected double costFromArray(double[] stats)
DescriptiveStatistics
. It
assumes that this is a zero sum set of costs. It assumes that the worst case
possible is all of the elements in one region server and the rest having 0.
stats
- the costs
protected double scale(double min, double max, double value)
min
- Min valuemax
- The Max valuevalue
- The value to be scaled.
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