org.apache.hadoop.hbase.master.balancer

Class StochasticLoadBalancer.ReadRequestCostFunction

java.lang.Object

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

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

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

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

Enclosing class:

StochasticLoadBalancer

static class StochasticLoadBalancer.ReadRequestCostFunction
extends StochasticLoadBalancer.CostFromRegionLoadAsRateFunction

Compute the cost of total number of read requests The more unbalanced the higher the computed cost will be. This uses a rolling average of regionload.

Field Summary

Fields

Modifier and Type	Field and Description
private static float	DEFAULT_READ_REQUEST_COST
private static String	READ_REQUEST_COST_KEY

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

cluster

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
protected double	getCostFromRl(BalancerRegionLoad rl)

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

getRegionLoadCost

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

cost, setClusterMetrics, setLoads

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

READ_REQUEST_COST_KEY

private static final String READ_REQUEST_COST_KEY

See Also:

Constant Field Values

DEFAULT_READ_REQUEST_COST

private static final float DEFAULT_READ_REQUEST_COST

See Also:

Constant Field Values

Constructor Detail

ReadRequestCostFunction

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

Method Detail

getCostFromRl

protected double getCostFromRl(BalancerRegionLoad rl)

Specified by:

getCostFromRl in class StochasticLoadBalancer.CostFromRegionLoadFunction