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Posted to mapreduce-issues@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2014/07/22 21:36:39 UTC

[jira] [Resolved] (MAPREDUCE-257) Preventing node from swapping

     [ https://issues.apache.org/jira/browse/MAPREDUCE-257?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Allen Wittenauer resolved MAPREDUCE-257.
----------------------------------------

    Resolution: Fixed

"prevent a node from swapping" -> "don't exhaust memory" -> "memory limits" -> "fixed"

Closing.

> Preventing node from swapping
> -----------------------------
>
>                 Key: MAPREDUCE-257
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-257
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Hong Tang
>
> When a node swaps, it slows everything: maps running on that node, reducers fetching output from the node, and DFS clients reading from the DN. We should just treat it the same way as if OS exhausts memory and kill some tasks to free up memory.



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