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https://issues.apache.org/jira/browse/HDFS-2943?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aaron T. Myers updated HDFS-2943:
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Attachment: HDFS-2943.patch
Here's a patch which addresses the issue. In addition to the above three
metrics, I also added "transactions since last edit log roll."
> Expose last checkpoint time and transaction stats as JMX metrics
> ----------------------------------------------------------------
>
> Key: HDFS-2943
> URL: https://issues.apache.org/jira/browse/HDFS-2943
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: name-node
> Affects Versions: 0.23.1
> Reporter: Aaron T. Myers
> Assignee: Aaron T. Myers
> Attachments: HDFS-2943.patch
>
>
> I think we should expose at least the following:
> * Last checkpoint time
> * Transactions since last checkpoint
> * Last written transaction
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