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https://issues.apache.org/jira/browse/IGNITE-4270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vladimir Ozerov updated IGNITE-4270:
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Issue Type: Sub-task (was: Task)
Parent: IGNITE-4262
> Hadoop: optionally stripe mapper output for every partition.
> ------------------------------------------------------------
>
> Key: IGNITE-4270
> URL: https://issues.apache.org/jira/browse/IGNITE-4270
> Project: Ignite
> Issue Type: Sub-task
> Components: hadoop
> Affects Versions: 1.8
> Reporter: Vladimir Ozerov
> Assignee: Vladimir Ozerov
> Fix For: 2.0
>
>
> Currently we have R maps for M mappers, where R is number of reducers. For
> this reason many mappers writes to concurrent offheap data structure, loosing
> time on concurrency burden.
> Let's add an option to create R * M maps, so that every mapper has dedicated
> map for every reducer. This will eliminate almost all concurrency overhead.
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