org.elasticsearch.cluster.routing.allocation.decider

Class ClusterRebalanceAllocationDecider

java.lang.Object

org.elasticsearch.common.component.AbstractComponent

org.elasticsearch.cluster.routing.allocation.decider.AllocationDecider

org.elasticsearch.cluster.routing.allocation.decider.ClusterRebalanceAllocationDecider

public class ClusterRebalanceAllocationDecider
extends AllocationDecider

This AllocationDecider controls re-balancing operations based on the cluster wide active shard state. This decided can not be configured in real-time and should be pre-cluster start via cluster.routing.allocation.allow_rebalance. This setting respects the following values:

• indices_primaries_active - Re-balancing is allowed only once all primary shards on all indices are active.
• indices_all_active - Re-balancing is allowed only once all shards on all indices are active.
• always - Re-balancing is allowed once a shard replication group is active

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ClusterRebalanceAllocationDecider.ClusterRebalanceType An enum representation for the configured re-balance type.

Field Summary

Fields

Modifier and Type	Field and Description
static Validator	ALLOCATION_ALLOW_REBALANCE_VALIDATOR
static String	CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE
static String	NAME

Fields inherited from class org.elasticsearch.common.component.AbstractComponent

deprecationLogger, logger, settings

Constructor Summary

Constructors

Constructor and Description
ClusterRebalanceAllocationDecider(Settings settings, NodeSettingsService nodeSettingsService)

Method Summary

Modifier and Type	Method and Description
Decision	canRebalance(RoutingAllocation allocation) Returns a Decision whether the cluster can execute re-balanced operations at all.
Decision	canRebalance(ShardRouting shardRouting, RoutingAllocation allocation) Returns a Decision whether the given shard routing can be re-balanced to the given allocation.

Methods inherited from class org.elasticsearch.cluster.routing.allocation.decider.AllocationDecider

canAllocate, canAllocate, canAllocate, canAllocate, canRemain

Methods inherited from class org.elasticsearch.common.component.AbstractComponent

logDeprecatedSetting, logRemovedSetting, nodeName

Methods inherited from class java.lang.Object

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

Field Detail

NAME

public static final String NAME

See Also:

Constant Field Values

CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE

public static final String CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE

See Also:

Constant Field Values

ALLOCATION_ALLOW_REBALANCE_VALIDATOR

public static final Validator ALLOCATION_ALLOW_REBALANCE_VALIDATOR

Constructor Detail

ClusterRebalanceAllocationDecider

@Inject
public ClusterRebalanceAllocationDecider(Settings settings,
                                                 NodeSettingsService nodeSettingsService)

Method Detail

canRebalance

public Decision canRebalance(ShardRouting shardRouting,
                             RoutingAllocation allocation)

Description copied from class: AllocationDecider

Returns a Decision whether the given shard routing can be re-balanced to the given allocation. The default is Decision.ALWAYS.

Overrides:

canRebalance in class AllocationDecider

canRebalance

public Decision canRebalance(RoutingAllocation allocation)

Description copied from class: AllocationDecider

Returns a Decision whether the cluster can execute re-balanced operations at all. Decision.ALWAYS.

Overrides:

canRebalance in class AllocationDecider