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From "Hong Tang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5817) Preventing node from swapping
Date Wed, 13 May 2009 08:52:45 GMT
Preventing node from swapping
-----------------------------

                 Key: HADOOP-5817
                 URL: https://issues.apache.org/jira/browse/HADOOP-5817
             Project: Hadoop Core
          Issue Type: Improvement
          Components: mapred
            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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