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https://issues.apache.org/jira/browse/IGNITE-4283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15722309#comment-15722309
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Vladimir Ozerov commented on IGNITE-4283:
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Design:
1) Every mapper works with it's own set of "remote" output maps;
2) These maps are essentially not "maps", but IO messages, which we fill up to
certain threshold;
3) Once filled, message is sent to remote node.
4) Async shuffle thread is no longer need in this architecture.
As a result we decrease concurrency, removes slowdown from a single shuffle
thread which is not able to send messages fast enough, and removes unnecessary
intermediate sorting.
NB! Be careful with "combiner" case and with "external" execution.
> Hadoop: implement "striped" shuffle mode.
> -----------------------------------------
>
> Key: IGNITE-4283
> URL: https://issues.apache.org/jira/browse/IGNITE-4283
> Project: Ignite
> Issue Type: Sub-task
> Components: hadoop
> Affects Versions: 1.7, 1.8
> Reporter: Vladimir Ozerov
> Assignee: Vladimir Ozerov
> Fix For: 2.0
>
>
> No need for this.
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