Rename dfs.datanode.max.xcievers and bump it's default value
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Key: HDFS-1861
URL: https://issues.apache.org/jira/browse/HDFS-1861
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Eli Collins
Assignee: Eli Collins
Fix For: 0.23.0
Reasonably sized jobs and HBase easily exhaust the current default for
dfs.datanode.max.xcievers. 4096 works better in practice.
Let's also deprecate it in favor of a more intuitive name, eg
dfs.datanode.max.receiver.threads.
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