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https://issues.apache.org/jira/browse/YARN-3881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15676313#comment-15676313
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Bingxue Qiu commented on YARN-3881:
-----------------------------------
Hi [~zjshen], I haven't find the totalVirtualCores / totalMB of cluster
metrics in the metrics.json, maybe it's necessary to show the water line
trends when the nodes changes, just like add nodes or nodes fail?
> Writing RM cluster-level metrics
> --------------------------------
>
> Key: YARN-3881
> URL: https://issues.apache.org/jira/browse/YARN-3881
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: timelineserver
> Reporter: Zhijie Shen
> Assignee: Zhijie Shen
> Labels: YARN-5355
> Attachments: metrics.json
>
>
> RM has a bunch of metrics that we may want to write into the timeline backend
> to. I attached the metrics.json that I've crawled via
> {{http://localhost:8088/jmx?qry=Hadoop:*}}. IMHO, we need to pay attention to
> three groups of metrics:
> 1. QueueMetrics
> 2. JvmMetrics
> 3. ClusterMetrics
> The problem is that unlike other metrics belongs to a single application,
> these ones belongs to RM or cluster-wide. Therefore, current write path is
> not going to work for these metrics because they don't have the associated
> user/flow/app context info. We need to rethink of modeling cross-app metrics
> and the api to handle them.
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