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Owen O'Malley commented on HADOOP-5784:
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This looks good, but I wish there was a good way to set up a test case. I guess the best way would be to create a JobTracker and call the heartbeat method and observe the requested heartbeat interval.
The length of the heartbeat cycle should be configurable.
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Key: HADOOP-5784
URL: https://issues.apache.org/jira/browse/HADOOP-5784
Project: Hadoop Core
Issue Type: Improvement
Components: mapred
Reporter: Owen O'Malley
Assignee: Amareshwari Sriramadasu
Fix For: 0.21.0

Attachments: patch-5784.txt


Currently, the hearbeat cycle is set to (# nodes / 100) in seconds. This can be too long for clusters that need to run low latency jobs. We should make the number of heartbeats that should arrive a second configurable.
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postedMay 8, '09 at 7:12a
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