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I have a cassandra cluster (two nodes) already set up. When I use nodetool to get the tablestats I get different values depending on where I use nodetool. Is there a way to get an output that give a representation of the entire cluster?

For example, when I use nodetool tablestats thingsboard (this is in my node 1), I get write latency: 0.015ms. And when I do the same, but in my node 2, I get write latency: 0.012ms.

Is there a way that I can get an average of this value within nodetool? Like: nodetool tablestats (node1 and node2) thingsboard ?

Thanks in advance

Francisco Parrilla
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No, it's not possible out of the box - all nodetool commands are using JMX of the node to which it's connected. To have aggregated results you need to setup some monitoring system, for example, by using Metrics Collector for Apache Cassandra (MCAC), and use Prometheus to scrape data, and represent data using Grafana. You can use other systems as well - for example, scrape JMX metrics using Prometheus's JMX collector, etc.

Alex Ott
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