Make DN minimum valid volumes configurable
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Key: HDFS-1161
URL: https://issues.apache.org/jira/browse/HDFS-1161
Project: Hadoop HDFS
Issue Type: Improvement
Components: data-node
Affects Versions: 0.22.0
Reporter: Eli Collins
Assignee: Eli Collins
Fix For: 0.22.0
The minimum number of non-faulty volumes to keep the DN active is hard-coded to
1. It would be useful to allow users to configure this value so the DN can be
taken offline when eg half of its disks fail, otherwise it doesn't get reported
until it's down to it's final disk and suffering degraded performance.
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