Object/Class

akka.cluster.sharding

ShardCoordinator

Related Docs: class ShardCoordinator | package sharding

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object ShardCoordinator

Source
ShardCoordinator.scala
See also

ClusterSharding extension

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Content Hierarchy
LeastShardAllocationStrategyAbstractShardAllocationStrategyShardAllocationStrategy
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Type Members

  1. abstract class AbstractShardAllocationStrategy extends ShardAllocationStrategy

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    Java API: Java implementations of custom shard allocation and rebalancing logic used by the ShardCoordinator should extend this abstract class and implement the two methods.

  2. class LeastShardAllocationStrategy extends ShardAllocationStrategy with Serializable

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    The default implementation of ShardCoordinator.LeastShardAllocationStrategy allocates new shards to the ShardRegion with least number of previously allocated shards.

    The default implementation of ShardCoordinator.LeastShardAllocationStrategy allocates new shards to the ShardRegion with least number of previously allocated shards. It picks shards for rebalancing handoff from the ShardRegion with most number of previously allocated shards. They will then be allocated to the ShardRegion with least number of previously allocated shards, i.e. new members in the cluster. There is a configurable threshold of how large the difference must be to begin the rebalancing. The number of ongoing rebalancing processes can be limited.

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    @SerialVersionUID()

  3. trait ShardAllocationStrategy extends NoSerializationVerificationNeeded

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    Interface of the pluggable shard allocation and rebalancing logic used by the ShardCoordinator.

    Interface of the pluggable shard allocation and rebalancing logic used by the ShardCoordinator.

    Java implementations should extend AbstractShardAllocationStrategy.

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