org.elasticsearch.cluster.routing.allocation.allocator

クラス BalancedShardsAllocator

java.lang.Object

org.elasticsearch.common.component.AbstractComponent

org.elasticsearch.cluster.routing.allocation.allocator.BalancedShardsAllocator

すべての実装されたインタフェース:

ShardsAllocator

public class BalancedShardsAllocator
extends AbstractComponent
implements ShardsAllocator

The BalancedShardsAllocator re-balances the nodes allocations within an cluster based on a BalancedShardsAllocator.WeightFunction. The clusters balance is defined by four parameters which can be set in the cluster update API that allows changes in real-time:

• cluster.routing.allocation.balance.shard - The shard balance defines the weight factor for shards allocated on a RoutingNode
• cluster.routing.allocation.balance.index - The index balance defines a factor to the number of ShardRoutings per index allocated on a specific node
• cluster.routing.allocation.balance.threshold - A threshold to set the minimal optimization value of operations that should be performed

These parameters are combined in a BalancedShardsAllocator.WeightFunction that allows calculation of node weights which are used to re-balance shards based on global as well as per-index factors.

ネストされたクラスのサマリー

ネストされたクラス

修飾子とタイプ	クラスと説明
static class	BalancedShardsAllocator.Balancer A BalancedShardsAllocator.Balancer
static class	BalancedShardsAllocator.WeightFunction This class is the primary weight function used to create balanced over nodes and shards in the cluster.

フィールドのサマリー

フィールド

修飾子とタイプ	フィールドと説明
static String	SETTING_INDEX_BALANCE_FACTOR
static String	SETTING_SHARD_BALANCE_FACTOR
static String	SETTING_THRESHOLD

クラスから継承されたフィールド org.elasticsearch.common.component.AbstractComponent

deprecationLogger, logger, settings

コンストラクタのサマリー

コンストラクタ

コンストラクタと説明
BalancedShardsAllocator(Settings settings)
BalancedShardsAllocator(Settings settings, NodeSettingsService nodeSettingsService)

メソッドのサマリー

修飾子とタイプ	メソッドと説明
boolean	allocateUnassigned(RoutingAllocation allocation) Assign all unassigned shards to nodes
void	applyFailedShards(FailedRerouteAllocation allocation) Applies changes on failed nodes based on the implemented algorithm.
void	applyStartedShards(StartedRerouteAllocation allocation) Applies changes on started nodes based on the implemented algorithm.
float	getIndexBalance() Returns the index related weight factor.
float	getShardBalance() Returns the shard related weight factor.
float	getThreshold() Returns the currently configured delta threshold
boolean	moveShards(RoutingAllocation allocation) Move started shards that can not be allocated to a node anymore
boolean	rebalance(RoutingAllocation allocation) Rebalancing number of shards on all nodes

クラスから継承されたメソッド org.elasticsearch.common.component.AbstractComponent

logDeprecatedSetting, logRemovedSetting, nodeName

クラスから継承されたメソッド java.lang.Object

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

フィールドの詳細

SETTING_THRESHOLD

public static final String SETTING_THRESHOLD

関連項目:

定数フィールド値

SETTING_INDEX_BALANCE_FACTOR

public static final String SETTING_INDEX_BALANCE_FACTOR

関連項目:

定数フィールド値

SETTING_SHARD_BALANCE_FACTOR

public static final String SETTING_SHARD_BALANCE_FACTOR

関連項目:

定数フィールド値

コンストラクタの詳細

BalancedShardsAllocator

public BalancedShardsAllocator(Settings settings)

BalancedShardsAllocator

@Inject
public BalancedShardsAllocator(Settings settings,
                                       NodeSettingsService nodeSettingsService)

メソッドの詳細

applyStartedShards

public void applyStartedShards(StartedRerouteAllocation allocation)

インタフェースからコピーされた説明: ShardsAllocator

Applies changes on started nodes based on the implemented algorithm. For example if a shard has changed to ShardRoutingState.STARTED from ShardRoutingState.RELOCATING this allocator might apply some cleanups on the node that used to hold the shard.

定義:

applyStartedShards インタフェース内 ShardsAllocator

パラメータ:

allocation - all started shards

applyFailedShards

public void applyFailedShards(FailedRerouteAllocation allocation)

インタフェースからコピーされた説明: ShardsAllocator

Applies changes on failed nodes based on the implemented algorithm.

定義:

applyFailedShards インタフェース内 ShardsAllocator

パラメータ:

allocation - all failed shards

allocateUnassigned

public boolean allocateUnassigned(RoutingAllocation allocation)

インタフェースからコピーされた説明: ShardsAllocator

Assign all unassigned shards to nodes

定義:

allocateUnassigned インタフェース内 ShardsAllocator

パラメータ:

allocation - current node allocation

戻り値:

true if the allocation has changed, otherwise false

rebalance

public boolean rebalance(RoutingAllocation allocation)

インタフェースからコピーされた説明: ShardsAllocator

Rebalancing number of shards on all nodes

定義:

rebalance インタフェース内 ShardsAllocator

パラメータ:

allocation - current node allocation

戻り値:

true if the allocation has changed, otherwise false

moveShards

public boolean moveShards(RoutingAllocation allocation)

インタフェースからコピーされた説明: ShardsAllocator

Move started shards that can not be allocated to a node anymore

定義:

moveShards インタフェース内 ShardsAllocator

パラメータ:

allocation - current node allocation

戻り値:

true if the allocation has changed, otherwise false

getThreshold

public float getThreshold()

Returns the currently configured delta threshold

getIndexBalance

public float getIndexBalance()

Returns the index related weight factor.

getShardBalance

public float getShardBalance()

Returns the shard related weight factor.