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https://issues.apache.org/jira/browse/FLINK-18990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-18990:
-----------------------------------
Labels: pull-request-available (was: )
> Optimize reading of channel state on recovery
> ---------------------------------------------
>
> Key: FLINK-18990
> URL: https://issues.apache.org/jira/browse/FLINK-18990
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Task
> Reporter: Roman Khachatryan
> Assignee: Roman Khachatryan
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.12.0
>
>
> Curently, channel state is read not sequentially.
> Inverting control would make it more efficient.
> Current call chain:
> {code:java}
> StreamTask.readRecoveredChannelState
> ResultPartition.readRecoveredState - loop through subpartitions
> PipelinedSubpartition.readRecoveredState - loop while have data;
> bufferBuilder =
> parent.getBufferPool().requestBufferBuilderBlocking(subpartitionInfo.getSubPartitionIdx());
> ChannelStateReader.readOutputData {code}
> Proposed call chain:
> {code:java}
> StreamTask.readRecoveredChannelState
> ChannelStateReader.readOutputData loop through state handles ordererd by
> handle, offset
> request buffer in the same way: BufferBuilder bufferBuilder =
> resPart.getBufferPool().requestBufferBuilderBlocking(subpartitionInfo.getSubPartitionIdx());
> pass to resPart.getSubpartition(idx).add(BufferConsumer, boolean,
> boolean)
> {code}
>
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