Jobtracker leaves tasktrackers underutilized
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Key: HADOOP-5632
URL: https://issues.apache.org/jira/browse/HADOOP-5632
Project: Hadoop Core
Issue Type: Improvement
Components: mapred
Affects Versions: 0.19.1, 0.19.0, 0.18.3, 0.18.2, 0.18.1, 0.18.0, 0.20.0
Environment: 2x HT 2.8GHz Intel Xeon, 3GB RAM, 4x 250GB HD linux
boxes, 100 node cluster
Reporter: Khaled Elmeleegy
Fix For: 0.20.0
For some workloads, the jobtracker doesn't keep all the slots utilized even
under heavy load.
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