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

Class ThrottlingAllocationDecider

java.lang.Object

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

org.elasticsearch.cluster.routing.allocation.decider.ThrottlingAllocationDecider

public class ThrottlingAllocationDecider
extends AllocationDecider

ThrottlingAllocationDecider controls the recovery process per node in the cluster. It exposes two settings via the cluster update API that allow changes in real-time:

• cluster.routing.allocation.node_initial_primaries_recoveries - restricts the number of initial primary shard recovery operations on a single node. The default is 4
• cluster.routing.allocation.node_concurrent_recoveries - restricts the number of total concurrent shards initializing on a single node. The default is 2

If one of the above thresholds is exceeded per node this allocation decider will return Decision.THROTTLE as a hit to upstream logic to throttle the allocation process to prevent overloading nodes due to too many concurrent recovery processes.

Field Summary

Fields

Modifier and Type	Field	Description
static Setting<java.lang.Integer>	CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_INCOMING_RECOVERIES_SETTING
static Setting<java.lang.Integer>	CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_OUTGOING_RECOVERIES_SETTING
static Setting<java.lang.Integer>	CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_RECOVERIES_SETTING
static Setting<java.lang.Integer>	CLUSTER_ROUTING_ALLOCATION_NODE_INITIAL_PRIMARIES_RECOVERIES_SETTING
static int	DEFAULT_CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_RECOVERIES
static int	DEFAULT_CLUSTER_ROUTING_ALLOCATION_NODE_INITIAL_PRIMARIES_RECOVERIES
static java.lang.String	NAME

Constructor Summary

Constructors

Constructor	Description
ThrottlingAllocationDecider(Settings settings, ClusterSettings clusterSettings)

Method Summary

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

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

canAllocate, canAllocate, canForceAllocatePrimary, canRebalance, canRebalance, canRemain, shouldAutoExpandToNode

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_RECOVERIES

public static final int DEFAULT_CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_RECOVERIES

See Also:

Constant Field Values

DEFAULT_CLUSTER_ROUTING_ALLOCATION_NODE_INITIAL_PRIMARIES_RECOVERIES

public static final int DEFAULT_CLUSTER_ROUTING_ALLOCATION_NODE_INITIAL_PRIMARIES_RECOVERIES

See Also:

Constant Field Values

NAME

public static final java.lang.String NAME

See Also:

Constant Field Values

CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_RECOVERIES_SETTING

public static final Setting<java.lang.Integer> CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_RECOVERIES_SETTING

CLUSTER_ROUTING_ALLOCATION_NODE_INITIAL_PRIMARIES_RECOVERIES_SETTING

public static final Setting<java.lang.Integer> CLUSTER_ROUTING_ALLOCATION_NODE_INITIAL_PRIMARIES_RECOVERIES_SETTING

CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_INCOMING_RECOVERIES_SETTING

public static final Setting<java.lang.Integer> CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_INCOMING_RECOVERIES_SETTING

CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_OUTGOING_RECOVERIES_SETTING

public static final Setting<java.lang.Integer> CLUSTER_ROUTING_ALLOCATION_NODE_CONCURRENT_OUTGOING_RECOVERIES_SETTING

Constructor Details

ThrottlingAllocationDecider

public ThrottlingAllocationDecider(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