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

Class EnableAllocationDecider

java.lang.Object

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

org.elasticsearch.cluster.routing.allocation.decider.EnableAllocationDecider

public class EnableAllocationDecider
extends AllocationDecider

This allocation decider allows shard allocations / rebalancing via the cluster wide settings CLUSTER_ROUTING_ALLOCATION_ENABLE_SETTING / CLUSTER_ROUTING_REBALANCE_ENABLE_SETTING and the per index setting INDEX_ROUTING_ALLOCATION_ENABLE_SETTING / INDEX_ROUTING_REBALANCE_ENABLE_SETTING. The per index settings overrides the cluster wide setting.

Allocation settings can have the following values (non-casesensitive):

• NONE - no shard allocation is allowed.
• NEW_PRIMARIES - only primary shards of new indices are allowed to be allocated
• PRIMARIES - only primary shards are allowed to be allocated
• ALL - all shards are allowed to be allocated

Rebalancing settings can have the following values (non-casesensitive):

• NONE - no shard rebalancing is allowed.
• REPLICAS - only replica shards are allowed to be balanced
• PRIMARIES - only primary shards are allowed to be balanced
• ALL - all shards are allowed to be balanced

See Also:

EnableAllocationDecider.Rebalance, EnableAllocationDecider.Allocation

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	EnableAllocationDecider.Allocation	Allocation values or rather their string representation to be used used with CLUSTER_ROUTING_ALLOCATION_ENABLE_SETTING / INDEX_ROUTING_ALLOCATION_ENABLE_SETTING via cluster / index settings.
static class	EnableAllocationDecider.Rebalance	Rebalance values or rather their string representation to be used used with CLUSTER_ROUTING_REBALANCE_ENABLE_SETTING / INDEX_ROUTING_REBALANCE_ENABLE_SETTING via cluster / index settings.

Field Summary

Fields

Modifier and Type	Field	Description
static Setting<EnableAllocationDecider.Allocation>	CLUSTER_ROUTING_ALLOCATION_ENABLE_SETTING
static Setting<EnableAllocationDecider.Rebalance>	CLUSTER_ROUTING_REBALANCE_ENABLE_SETTING
static Setting<EnableAllocationDecider.Allocation>	INDEX_ROUTING_ALLOCATION_ENABLE_SETTING
static Setting<EnableAllocationDecider.Rebalance>	INDEX_ROUTING_REBALANCE_ENABLE_SETTING
static String	NAME

Constructor Summary

Constructors

Constructor	Description
EnableAllocationDecider(Settings settings, ClusterSettings clusterSettings)

Method Summary

Modifier and Type	Method	Description
Decision	canAllocate(ShardRouting shardRouting, RoutingAllocation allocation)	Returns a Decision whether the given shard routing can be allocated at all at this state of the RoutingAllocation.
Decision	canAllocate(ShardRouting shardRouting, RoutingNode node, RoutingAllocation allocation)	Returns a Decision whether the given shard routing can be allocated on the given node.
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, 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 String NAME

See Also:

Constant Field Values

CLUSTER_ROUTING_ALLOCATION_ENABLE_SETTING

public static final Setting<EnableAllocationDecider.Allocation> CLUSTER_ROUTING_ALLOCATION_ENABLE_SETTING

INDEX_ROUTING_ALLOCATION_ENABLE_SETTING

public static final Setting<EnableAllocationDecider.Allocation> INDEX_ROUTING_ALLOCATION_ENABLE_SETTING

CLUSTER_ROUTING_REBALANCE_ENABLE_SETTING

public static final Setting<EnableAllocationDecider.Rebalance> CLUSTER_ROUTING_REBALANCE_ENABLE_SETTING

INDEX_ROUTING_REBALANCE_ENABLE_SETTING

public static final Setting<EnableAllocationDecider.Rebalance> INDEX_ROUTING_REBALANCE_ENABLE_SETTING

Constructor Details

EnableAllocationDecider

public EnableAllocationDecider(Settings settings,
 ClusterSettings clusterSettings)

Method Details

canAllocate

public Decision canAllocate(ShardRouting shardRouting,
 RoutingNode node,
 RoutingAllocation allocation)

Description copied from class: AllocationDecider

Returns a Decision whether the given shard routing can be allocated on the given node. The default is Decision.ALWAYS.

Overrides:

canAllocate in class AllocationDecider

canAllocate

public Decision canAllocate(ShardRouting shardRouting,
 RoutingAllocation allocation)

Description copied from class: AllocationDecider

Returns a Decision whether the given shard routing can be allocated at all at this state of the RoutingAllocation. The default is Decision.ALWAYS.

Overrides:

canAllocate 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

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