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https://issues.apache.org/jira/browse/SPARK-27603?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chenzhao Guo updated SPARK-27603:
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Description:
ShuffleClient resides in BlockManager, it's the client to read other executors'
shuffle files.
ShuffleManager is pluggable, however, ShuffleClient is restrained to be either
a `NettyBlockTransferService` or an
`ExternalShuffleClient`(&`MesosExternalShuffleClient`).
When a custom ShuffleManager is used, the current 3 implementations of
ShuffleClient may not be enough. For example, a shuffle manager leveraging
remote storage may require the network transferring shuffle data index(the
ranges of blocks) from the executor who wrote them, and then read directly from
the globally-accessible remote storage, instead of transfering data through
network as the 3 implementations do. Also, there is need for non-Netty based
block transfer service.
was:
ShuffleClient resides in BlockManager, it's the client to read other executors'
shuffle files.
ShuffleManager is pluggable, however, ShuffleClient is restrained to be either
a `NettyBlockTransferService` or an
`ExternalShuffleClient`(&`MesosExternalShuffleClient`).
When a custom ShuffleManager is used, the current 3 implementations of
ShuffleClient may not be enough. For example, a shuffle manager leveraging
remote storage may not need either of these 3 ShuffleClients. It may require
the network transferring shuffle data index(the ranges of blocks) from the
executor who wrote them, and then read directly from the globally-accessible
remote storage, instead of transfering data through network as the 3
implementations do. Also, there is need for non-Netty based block transfer
service.
> Make ShuffleClient pluggable
> ----------------------------
>
> Key: SPARK-27603
> URL: https://issues.apache.org/jira/browse/SPARK-27603
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.4.0
> Reporter: Chenzhao Guo
> Priority: Major
>
> ShuffleClient resides in BlockManager, it's the client to read other
> executors' shuffle files.
> ShuffleManager is pluggable, however, ShuffleClient is restrained to be
> either a `NettyBlockTransferService` or an
> `ExternalShuffleClient`(&`MesosExternalShuffleClient`).
> When a custom ShuffleManager is used, the current 3 implementations of
> ShuffleClient may not be enough. For example, a shuffle manager leveraging
> remote storage may require the network transferring shuffle data index(the
> ranges of blocks) from the executor who wrote them, and then read directly
> from the globally-accessible remote storage, instead of transfering data
> through network as the 3 implementations do. Also, there is need for
> non-Netty based block transfer service.
>
>
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