Package org.elasticsearch.cluster.routing.allocation.decider

Class ClusterRebalanceAllocationDecider

java.lang.Object

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

Field Summary

Fields

Modifier and Type	Field	Description
static Setting<ClusterRebalanceAllocationDecider.ClusterRebalanceType>	CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING
static java.lang.String	NAME

Constructor Summary

Constructors

Constructor	Description
ClusterRebalanceAllocationDecider(Settings settings, ClusterSettings clusterSettings)

Method Summary

Modifier and Type	Method	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, canForceAllocatePrimary, canRemain, shouldAutoExpandToNode

Methods inherited from class java.lang.Object

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

Field Details

NAME

public static final java.lang.String NAME

See Also:

Constant Field Values

CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING

public static final Setting<ClusterRebalanceAllocationDecider.ClusterRebalanceType> CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING

Constructor Details

ClusterRebalanceAllocationDecider

public ClusterRebalanceAllocationDecider(Settings settings,
ClusterSettings clusterSettings)

Method Details

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