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https://issues.apache.org/jira/browse/HDFS-2554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13435653#comment-13435653
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Eli Collins commented on HDFS-2554:
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Wrt CorruptBlocksRN as long as we can distinguish between a block with *all*
corrupt replicas and *some* corrupt replicas we're good.
Probably best at this point to just code up a patch with your proposal.
> Add separate metrics for missing blocks with desired replication level 1
> ------------------------------------------------------------------------
>
> Key: HDFS-2554
> URL: https://issues.apache.org/jira/browse/HDFS-2554
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 2.0.0-alpha
> Reporter: Todd Lipcon
> Assignee: Andy Isaacson
> 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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