org.apache.hadoop.hbase.master.balancer

Class StochasticLoadBalancer.MoveCostFunction

java.lang.Object

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

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

Enclosing class:

StochasticLoadBalancer

static class StochasticLoadBalancer.MoveCostFunction
extends StochasticLoadBalancer.CostFunction

Given the starting state of the regions and a potential ending state compute cost based upon the number of regions that have moved.

Field Summary

Fields

Modifier and Type	Field and Description
private org.apache.hadoop.conf.Configuration	conf
private static float	DEFAULT_MAX_MOVE_PERCENT
private static int	DEFAULT_MAX_MOVES
(package private) static float	DEFAULT_MOVE_COST
(package private) static float	DEFAULT_MOVE_COST_OFFPEAK
private static String	MAX_MOVES_PERCENT_KEY
private float	maxMovesPercent
private static String	MOVE_COST_KEY
private static String	MOVE_COST_OFFPEAK_KEY

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

cluster

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
protected double	cost()

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

MOVE_COST_KEY

private static final String MOVE_COST_KEY

See Also:

Constant Field Values

MOVE_COST_OFFPEAK_KEY

private static final String MOVE_COST_OFFPEAK_KEY

See Also:

Constant Field Values

MAX_MOVES_PERCENT_KEY

private static final String MAX_MOVES_PERCENT_KEY

See Also:

Constant Field Values

DEFAULT_MOVE_COST

static final float DEFAULT_MOVE_COST

See Also:

Constant Field Values

DEFAULT_MOVE_COST_OFFPEAK

static final float DEFAULT_MOVE_COST_OFFPEAK

See Also:

Constant Field Values

DEFAULT_MAX_MOVES

private static final int DEFAULT_MAX_MOVES

See Also:

Constant Field Values

DEFAULT_MAX_MOVE_PERCENT

private static final float DEFAULT_MAX_MOVE_PERCENT

See Also:

Constant Field Values

maxMovesPercent

private final float maxMovesPercent

conf

private final org.apache.hadoop.conf.Configuration conf

Constructor Detail

MoveCostFunction

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

Method Detail

cost

protected double cost()

Specified by:

cost in class StochasticLoadBalancer.CostFunction