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https://issues.apache.org/jira/browse/HDFS-2708?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aaron T. Myers updated HDFS-2708:
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Description: It would be useful for tools to be able to retrieve the
total number of blocks on each datanode. (was: It would be useful for tools to
be able to retrieve the total # blocks in the file system (and also display eg
via dfsadmin report, this is currently only available via FSNamesystemMetrics,
so would add to ClientProtocol#getStats?) and the total number of blocks on
each datanode (via DataNodeInfo).)
Target Version/s: 2.0.0 (was: 1.1.0, 0.23.1)
Affects Version/s: 2.0.0
Assignee: Aaron T. Myers
Summary: Stats for the # of blocks per DN (was: Stats for the
total # blocks and blocks per DN)
Let's separate the original description of this JIRA into multiple distinct
issues. In this JIRA, let's just add support for getting the number of blocks
on each DN via the FSNamesystem metrics, since that interface already has
support for retrieving the total number of blocks in the file system.
If we really do want to add other interfaces to retrieve both of these metrics,
let's do that in a separate JIRA.
> Stats for the # of blocks per DN
> --------------------------------
>
> Key: HDFS-2708
> URL: https://issues.apache.org/jira/browse/HDFS-2708
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: data-node, name-node
> Affects Versions: 2.0.0
> Reporter: Eli Collins
> Assignee: Aaron T. Myers
> Priority: Minor
>
> It would be useful for tools to be able to retrieve the total number of
> blocks on each datanode.
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