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

Class ResizeAllocationDecider

java.lang.Object

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

org.elasticsearch.cluster.routing.allocation.decider.ResizeAllocationDecider

public class ResizeAllocationDecider
extends AllocationDecider

An allocation decider that ensures we allocate the shards of a target index for resize operations next to the source primaries

Field Summary

Fields

Modifier and Type	Field	Description
static final String	NAME

Constructor Summary

Constructors

Constructor	Description
ResizeAllocationDecider()

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	canForceAllocateDuringReplace(ShardRouting shardRouting, RoutingNode node, RoutingAllocation allocation)	Returns a Decision whether the given shard can be forced to the given node in the event that the shard's source node is being replaced.
Decision	canForceAllocatePrimary(ShardRouting shardRouting, RoutingNode node, RoutingAllocation allocation)	Returns a Decision whether the given primary shard can be forcibly allocated on the given node.

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

canAllocate, canAllocateReplicaWhenThereIsRetentionLease, canRebalance, canRebalance, 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

Constructor Details

ResizeAllocationDecider

public ResizeAllocationDecider()

Method Details

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

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

canForceAllocatePrimary

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

Description copied from class: AllocationDecider

Returns a Decision whether the given primary shard can be forcibly allocated on the given node. This method should only be called for unassigned primary shards where the node has a shard copy on disk. Note: all implementations that override this behavior should take into account the results of AllocationDecider.canAllocate(ShardRouting, RoutingNode, RoutingAllocation) before making a decision on force allocation, because force allocation should only be considered if all deciders return Decision.NO.

Overrides:

canForceAllocatePrimary in class AllocationDecider

canForceAllocateDuringReplace

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

Description copied from class: AllocationDecider

Returns a Decision whether the given shard can be forced to the given node in the event that the shard's source node is being replaced. This allows nodes using a replace-type node shutdown to override certain deciders in the interest of moving the shard away from a node that *must* be removed. It defaults to returning "YES" and must be overridden by deciders that opt-out to having their other NO decisions *not* overridden while vacating. The caller is responsible for first checking: - that a replacement is ongoing - the shard routing's current node is the source of the replacement

Overrides:

canForceAllocateDuringReplace in class AllocationDecider