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From "Marco Nicosia (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3058) Hadoop DFS to report more replication metrics
Date Mon, 14 Apr 2008 21:57:05 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12588813#action_12588813
] 

Marco Nicosia commented on HADOOP-3058:
---------------------------------------

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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