distcp should permit users to limit the number of maps
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Key: HADOOP-3350
URL: https://issues.apache.org/jira/browse/HADOOP-3350
Project: Hadoop Core
Issue Type: Improvement
Reporter: Chris Douglas
Fix For: 0.18.0
distcp provides no user-configurable setting to affect the number of maps run
during a copy. For large clusters, the current calculation- min(#bytes / 256MB,
#nodes * 20)- can be overly aggressive.
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