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Bharath Vissapragada commented on HBASE-25865: ---------------------------------------------- thanks, lgtm. > Visualize current state of region assignment > -------------------------------------------- > > Key: HBASE-25865 > URL: https://issues.apache.org/jira/browse/HBASE-25865 > Project: HBase > Issue Type: New Feature > Components: master, Operability, Usability > Reporter: Nick Dimiduk > Assignee: Nick Dimiduk > Priority: Major > Fix For: 3.0.0-alpha-1, 2.5.0 > > Attachments: image1.png, image2.png > > > After several months of debugging and tuning the balancer and normalizer on a > large production cluster, we found that working from visualizations of the > current region state was very useful for understanding behaviors and > quantifying improvements we made along the way. Specifically, we found that a > chart of total assigned region count and total assigned region store files > size per table per host was immensely useful for tuning the balancer. > Histograms of store file size made understanding normalizer activity much > more intuitive. > Our scripts would parse the output of the shell's {{status 'detailed'}} > command, extract the desired metric, and produce charts. I'd like to build > into the master UI the equivalent functionality, with data coming directly > from the {{ClusterMetrics object}}, and data rendered into an interactive > chart rendered in the browser. -- This message was sent by Atlassian Jira (v8.3.4#803005)