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(Updated 2010-11-01 14:07:12.847651) Review request for hadoop-mapreduce and Dhruba Borthakur. Changes ------- Fixed some comments I'd copied over but left unchanged. Summary ------- Extend TaskTrackerStatus.ResourceStatus and ResourceCalculatorPlugin to allow for sending last-one-minute load average reports. Here's a link on load and how they could help with scheduling: http://en.wikipedia.org/wiki/Load_(computing) This addresses bug MAPREDUCE-2170. https://issues.apache.org/jira/browse/MAPREDUCE-2170 Diffs (updated) ----- /trunk/src/java/org/apache/hadoop/mapred/TaskTrackerStatus.java 1029240 /trunk/src/java/org/apache/hadoop/mapreduce/util/LinuxResourceCalculatorPlugin.java 1029240 /trunk/src/java/org/apache/hadoop/mapreduce/util/ResourceCalculatorPlugin.java 1029240 /trunk/src/test/mapred/org/apache/hadoop/mapred/DummyResourceCalculatorPlugin.java 1029240 /trunk/src/test/mapred/org/apache/hadoop/mapred/TestTTResourceReporting.java 1029240 /trunk/src/test/mapred/org/apache/hadoop/mapreduce/util/TestLinuxResourceCalculatorPlugin.java 1029240 Diff: https://reviews.apache.org/r/20/diff Testing ------- /proc/loadavg is available on all GNU/Linux systems. Post editing and recompiling, "ant clean; ant test" passes. I've added a test case for the Linux plugin, and also extended the existing TT Reporting test to beam out and receive load averages. Please let me know if I need to add any more tests. Thanks, Harsh
