Package org.elasticsearch.gateway

Class ReplicaShardAllocator

java.lang.Object

org.elasticsearch.common.component.AbstractComponent

org.elasticsearch.gateway.BaseGatewayShardAllocator

org.elasticsearch.gateway.ReplicaShardAllocator

public abstract class ReplicaShardAllocator
extends BaseGatewayShardAllocator

Field Summary

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

deprecationLogger, logger, settings

Constructor Summary

Constructors

Constructor	Description
ReplicaShardAllocator(Settings settings)

Method Summary

Modifier and Type	Method	Description
protected abstract AsyncShardFetch.FetchResult<TransportNodesListShardStoreMetaData.NodeStoreFilesMetaData>	fetchData(ShardRouting shard, RoutingAllocation allocation)
protected abstract boolean	hasInitiatedFetching(ShardRouting shard)	Returns a boolean indicating whether fetching shard data has been triggered at any point for the given shard.
AllocateUnassignedDecision	makeAllocationDecision(ShardRouting unassignedShard, RoutingAllocation allocation, org.apache.logging.log4j.Logger logger)	Make a decision on the allocation of an unassigned shard.
void	processExistingRecoveries(RoutingAllocation allocation)	Process existing recoveries of replicas and see if we need to cancel them if we find a better match.

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

logDeprecatedSetting, logRemovedSetting, nodeName

Methods inherited from class org.elasticsearch.gateway.BaseGatewayShardAllocator

allocateUnassigned, buildDecisionsForAllNodes

Methods inherited from class java.lang.Object

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

Constructor Detail

ReplicaShardAllocator

public ReplicaShardAllocator(Settings settings)

Method Detail

processExistingRecoveries

public void processExistingRecoveries(RoutingAllocation allocation)

Process existing recoveries of replicas and see if we need to cancel them if we find a better match. Today, a better match is one that has full sync id match compared to not having one in the previous recovery.

makeAllocationDecision

public AllocateUnassignedDecision makeAllocationDecision(ShardRouting unassignedShard,
                                                         RoutingAllocation allocation,
                                                         org.apache.logging.log4j.Logger logger)

Description copied from class: BaseGatewayShardAllocator

Make a decision on the allocation of an unassigned shard. This method is used by BaseGatewayShardAllocator.allocateUnassigned(RoutingAllocation) to make decisions about whether or not the shard can be allocated by this allocator and if so, to which node it will be allocated.

Specified by:

makeAllocationDecision in class BaseGatewayShardAllocator

Parameters:

unassignedShard - the unassigned shard to allocate

allocation - the current routing state

logger - the logger

Returns:

an AllocateUnassignedDecision with the final decision of whether to allocate and details of the decision

fetchData

protected abstract AsyncShardFetch.FetchResult<TransportNodesListShardStoreMetaData.NodeStoreFilesMetaData> fetchData(ShardRouting shard,
                                                                                                                      RoutingAllocation allocation)

hasInitiatedFetching

protected abstract boolean hasInitiatedFetching(ShardRouting shard)

Returns a boolean indicating whether fetching shard data has been triggered at any point for the given shard.