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https://issues.apache.org/jira/browse/HADOOP-3058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12588813#action_12588813
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Marco Nicosia commented on HADOOP-3058:
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Now that this has been scheduled for a release, I realize that there were a few
metrics that I should also have asked for. Hopefully these are not significant
changes in scope.
In addition to the above, I forgot to ask for the most basic stats. It's very
important that the NN send metrics on the number of files and blocks in the
system, so that we can trend these over time. Including the number of
directories would be a bonus.
> Hadoop DFS to report more replication metrics
> ---------------------------------------------
>
> Key: HADOOP-3058
> URL: https://issues.apache.org/jira/browse/HADOOP-3058
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs, metrics
> Reporter: Marco Nicosia
> Priority: Minor
>
> Currently, the namenode and each datanode reports 'blocksreplicatedpersec.'
> We'd like to be able to graph pending replications, vs number of under
> replicated blocks, vs. replications per second, so that we can get a better
> idea of the replication activity within the DFS.
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