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Type:
Improvement
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Status: Patch Available
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Priority:
Major
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Resolution: Unresolved
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Affects Version/s: 0.20.1, 0.21.0
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Fix Version/s: None
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Component/s: jobtracker
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Labels:
JobTracker's hostnameToNodeMap cache can speed up JobInProgress.initTasks() and JobInProgress.createCache() significantly. A test for 1 job with 100000 maps on a 2400 cluster shows nearly 10 and 50 times speed up for initTasks() and createCache().