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https://issues.apache.org/jira/browse/HADOOP-10802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14084654#comment-14084654
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Alejandro Abdelnur commented on HADOOP-10802:
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i've browsed the patch, the approach looks good. just not sure about the
captured metrics.
IMO, we shouldn't capture per key metrics. knowing a key is request more than
others, I don't think brings much.
i would keep track of going below watermarks and refill requests and I would
log the key names.
> Add metrics for KMS client and server encrypted key caches
> ----------------------------------------------------------
>
> Key: HADOOP-10802
> URL: https://issues.apache.org/jira/browse/HADOOP-10802
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 3.0.0
> Reporter: Andrew Wang
> Assignee: Arun Suresh
> Attachments: HADOOP-10802.WIP.patch
>
>
> HADOOP-10720 is adding KMS server and client caches for encrypted keys for
> performance reasons. It would be good to add metrics to make sure that the
> cache is working as expected, and to inform future dynamic cache sizing and
> refilling policies.
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