Package org.apache.hadoop.hbase.master.balancer

Class DistributeReplicasConditional

java.lang.Object

org.apache.hadoop.hbase.master.balancer.RegionPlanConditional

org.apache.hadoop.hbase.master.balancer.DistributeReplicasConditional

@Private
public class DistributeReplicasConditional
extends RegionPlanConditional

If enabled, this class will help the balancer ensure that replicas aren't placed on the same servers or racks as their primary. Configure this via BalancerConditionals.DISTRIBUTE_REPLICAS_KEY

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.master.balancer.RegionPlanConditional

RegionPlanConditional.ValidationLevel

Field Summary

Fields

Modifier and Type	Field	Description
private final List<RegionPlanConditionalCandidateGenerator>	candidateGenerators

Constructor Summary

Constructors

Constructor	Description
DistributeReplicasConditional(BalancerConditionals balancerConditionals, BalancerClusterState cluster)

Method Summary

Modifier and Type	Method	Description
private boolean	checkViolation(RegionInfo movingRegion, ReplicaKey movingReplicaKey, Set<RegionInfo> destinationRegions)
(package private) List<RegionPlanConditionalCandidateGenerator>	getCandidateGenerators()	Get the candidate generator(s) for this conditional.
(package private) static ReplicaKey	getReplicaKey(RegionInfo regionInfo)
RegionPlanConditional.ValidationLevel	getValidationLevel()	Returns a RegionPlanConditional.ValidationLevel that is appropriate for this conditional.
(package private) boolean	isViolatingHost(RegionPlan regionPlan, Set<RegionInfo> hostRegions)
(package private) boolean	isViolatingRack(RegionPlan regionPlan, Set<RegionInfo> rackRegions)
(package private) boolean	isViolatingServer(RegionPlan regionPlan, Set<RegionInfo> serverRegions)

Methods inherited from class org.apache.hadoop.hbase.master.balancer.RegionPlanConditional

isViolating, setClusterState

Methods inherited from class java.lang.Object

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

Field Details

candidateGenerators

private final List<RegionPlanConditionalCandidateGenerator> candidateGenerators

Constructor Details

DistributeReplicasConditional

public DistributeReplicasConditional(BalancerConditionals balancerConditionals,
 BalancerClusterState cluster)

Method Details

getValidationLevel

public RegionPlanConditional.ValidationLevel getValidationLevel()

Description copied from class: RegionPlanConditional

Returns a RegionPlanConditional.ValidationLevel that is appropriate for this conditional.

Specified by:

getValidationLevel in class RegionPlanConditional

Returns:

the validation level

getCandidateGenerators

List<RegionPlanConditionalCandidateGenerator> getCandidateGenerators()

Description copied from class: RegionPlanConditional

Get the candidate generator(s) for this conditional. This can be useful to provide the balancer with hints that will appease your conditional. Your conditionals will be triggered in order.

Specified by:

getCandidateGenerators in class RegionPlanConditional

Returns:

the candidate generator for this conditional

isViolatingServer

boolean isViolatingServer(RegionPlan regionPlan,
 Set<RegionInfo> serverRegions)

Specified by:

isViolatingServer in class RegionPlanConditional

isViolatingHost

boolean isViolatingHost(RegionPlan regionPlan,
 Set<RegionInfo> hostRegions)

Overrides:

isViolatingHost in class RegionPlanConditional

isViolatingRack

boolean isViolatingRack(RegionPlan regionPlan,
 Set<RegionInfo> rackRegions)

Overrides:

isViolatingRack in class RegionPlanConditional

checkViolation

private boolean checkViolation(RegionInfo movingRegion,
 ReplicaKey movingReplicaKey,
 Set<RegionInfo> destinationRegions)

getReplicaKey

static ReplicaKey getReplicaKey(RegionInfo regionInfo)