org.apache.hadoop.hbase.master.balancer

Class StochasticLoadBalancer.CostFromRegionLoadFunction

java.lang.Object

org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.CostFunction

org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.CostFromRegionLoadFunction

Direct Known Subclasses:

StochasticLoadBalancer.CostFromRegionLoadAsRateFunction, StochasticLoadBalancer.StoreFileCostFunction

Enclosing class:

StochasticLoadBalancer

abstract static class StochasticLoadBalancer.CostFromRegionLoadFunction
extends StochasticLoadBalancer.CostFunction

Base class the allows writing costs functions from rolling average of some number from RegionLoad.

Field Summary

Fields

Modifier and Type	Field and Description
private ClusterMetrics	clusterStatus
private Map<String,Deque<BalancerRegionLoad>>	loads
private double[]	stats

Fields inherited from class org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.CostFunction

cluster

Constructor Summary

Constructors

Constructor and Description
CostFromRegionLoadFunction(org.apache.hadoop.conf.Configuration conf)

Method Summary

Modifier and Type	Method and Description
(package private) double	cost()
protected abstract double	getCostFromRl(BalancerRegionLoad rl)
protected double	getRegionLoadCost(Collection<BalancerRegionLoad> regionLoadList)
(package private) void	setClusterMetrics(ClusterMetrics status)
(package private) void	setLoads(Map<String,Deque<BalancerRegionLoad>> l)

Methods inherited from class org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.CostFunction

costFromArray, getMultiplier, init, isNeeded, postAction, regionMoved, scale, setMultiplier

Methods inherited from class java.lang.Object

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

Field Detail

clusterStatus

private ClusterMetrics clusterStatus

loads

private Map<String,Deque<BalancerRegionLoad>> loads

stats

private double[] stats

Constructor Detail

CostFromRegionLoadFunction

CostFromRegionLoadFunction(org.apache.hadoop.conf.Configuration conf)

Method Detail

setClusterMetrics

void setClusterMetrics(ClusterMetrics status)

setLoads

void setLoads(Map<String,Deque<BalancerRegionLoad>> l)

cost

double cost()

Specified by:

cost in class StochasticLoadBalancer.CostFunction

getRegionLoadCost

protected double getRegionLoadCost(Collection<BalancerRegionLoad> regionLoadList)

getCostFromRl

protected abstract double getCostFromRl(BalancerRegionLoad rl)