Add separate metrics for missing blocks with desired replication level 1
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Key: HDFS-2554
URL: https://issues.apache.org/jira/browse/HDFS-2554
Project: Hadoop HDFS
Issue Type: Improvement
Components: name-node
Reporter: Todd Lipcon
Priority: Minor
Some users use replication level set to 1 for datasets which are unimportant
and can be lost with no worry (eg the output of terasort tests). But other data
on the cluster is important and should not be lost. It would be useful to
separate the metric for missing blocks by the desired replication level of
those blocks, so that one could ignore missing blocks at repl 1 while still
alerting on missing blocks with higher desired replication.
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