org.elasticsearch.cluster.routing.allocation.decider

Class ConcurrentRebalanceAllocationDecider

java.lang.Object

org.elasticsearch.common.component.AbstractComponent

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

org.elasticsearch.cluster.routing.allocation.decider.ConcurrentRebalanceAllocationDecider

public class ConcurrentRebalanceAllocationDecider
extends AllocationDecider

Similar to the ClusterRebalanceAllocationDecider this AllocationDecider controls the number of currently in-progress re-balance (relocation) operations and restricts node allocations if the configured threashold is reached. The default number of concurrent rebalance operations is set to 2

Re-balance operations can be controlled in real-time via the cluster update API using cluster.routing.allocation.cluster_concurrent_rebalance. Iff this setting is set to -1 the number of concurrent re-balance operations are unlimited.

Field Summary

Fields

Modifier and Type	Field and Description
static String	CLUSTER_ROUTING_ALLOCATION_CLUSTER_CONCURRENT_REBALANCE
static String	NAME

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

deprecationLogger, logger, settings

Constructor Summary

Constructors

Constructor and Description
ConcurrentRebalanceAllocationDecider(Settings settings, NodeSettingsService nodeSettingsService)

Method Summary

Methods

Modifier and Type	Method and Description
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, canRebalance, 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_CLUSTER_CONCURRENT_REBALANCE

public static final String CLUSTER_ROUTING_ALLOCATION_CLUSTER_CONCURRENT_REBALANCE

See Also:

Constant Field Values

Constructor Detail

ConcurrentRebalanceAllocationDecider

@Inject
public ConcurrentRebalanceAllocationDecider(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