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https://issues.apache.org/jira/browse/IGNITE-3414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15364912#comment-15364912
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Vladimir Ozerov commented on IGNITE-3414:
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Yes, I meant LinkedHashSet here.
> Hadoop: Optimize map-reduce job planning.
> -----------------------------------------
>
> Key: IGNITE-3414
> URL: https://issues.apache.org/jira/browse/IGNITE-3414
> Project: Ignite
> Issue Type: Task
> Components: hadoop
> Affects Versions: 1.6
> Reporter: Vladimir Ozerov
> Assignee: Vladimir Ozerov
> Priority: Critical
> Fix For: 1.7
>
>
> Currently Hadoop module has inefficient map-reduce planning engine. In
> particular, it assigns tasks only to affinity nodes. It could lead to
> situation when very huge tasks is processed by a single cluster node, while
> other cluster nodes are idle.
> We should implement configurable map-reduce planner which will be able to
> utilize the whole cluster.
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