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https://issues.apache.org/jira/browse/HDFS-5951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13902014#comment-13902014
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Haohui Mai commented on HDFS-5951:
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I think Ambari is more focused on providing statistics, but the point of the
work is to pass down the experience from operation / support practice as rules
so that the wisdom can benefit the general users.
For example, the current patch implements a rule that issues a warning if the
namenode has not been checkpointed for a while. We plan to implement checks on
whether the size of heap is appropriate for the scale of the namespace, etc.
These rules are not necessarily monitoring rules, they provide suggestions on
best practice on operation.
It seems to me that they are highly specific to HDFS. It should be the
responsibility of the HDFS developers to provide these rules and let external
entities (e.g., Ambari) to query the results from HDFS.
> Provide diagnosis information in the Web UI
> -------------------------------------------
>
> Key: HDFS-5951
> URL: https://issues.apache.org/jira/browse/HDFS-5951
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Haohui Mai
> Assignee: Haohui Mai
> Attachments: HDFS-5951.000.patch, diagnosis-failure.png,
> diagnosis-succeed.png
>
>
> HDFS should provide operation statistics in its UI. it can go one step
> further by leveraging the information to diagnose common problems.
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